LC1D vs TeSys F/G: Which Contactor for High-Power Motors?

By Abdullah Zahid
22 min read
Schneider Electric LC1D TeSys D and TeSys F contactors side by side for high-power motor application comparison

LC1D vs TeSys F/G Contactors: Choosing the Right Schneider Contactor for High-Power Motors

When an engineer is finalizing a motor feeder design and the motor nameplate pushes into higher kW territory, one question surfaces quickly: is the LC1D (TeSys D / TeSys Deca) contactor family sufficient, or does this application demand the heavier-duty TeSys F or TeSys G frame? The answer depends on motor full-load current at the actual operating voltage, starting duty class, and available short-circuit current at the starter — not on kW alone. TeSys D (LC1D) contactors cover AC-3 currents from approximately 9 A up to around 150 A, corresponding to motors up to about 75 kW at 400 V depending on frame, while TeSys F contactors begin around 115 A AC-3 and extend to several hundred amps for genuinely large drives. Getting this boundary wrong in either direction costs real money — either in an oversized panel or in a coordination failure at the first fault.

If you have already confirmed which family fits your motor data and fault level, check current pricing and availability at LeadTime.ca — ships worldwide.

Who Should Choose LC1D, and Who Needs TeSys F/G?

This comparison is right for engineers sizing contactors for medium-to-large three-phase motors where the LC1D frame may be approaching its limits. Buy LC1D (TeSys D / Deca) when all of the following apply:

  • Motor full-load current at your operating voltage falls within the AC-3 rating of the chosen LC1D catalog number, with reasonable margin
  • Starting duty is normal (infrequent starts, standard torque loads such as pumps and fans in the 15–75 kW range at 400 V)
  • Short-circuit current at the starter can be coordinated using LC1D-based starter combinations per Schneider coordination tables
  • Panel footprint is a priority and the compact LC1D frame fits the enclosure design
  • Accessory ecosystem (auxiliary blocks, interlocks, surge suppressors, TeSys Green coils) and off-the-shelf availability are important to the project schedule

If motor FLC exceeds LC1D's AC-3 envelope at your voltage, starting duty is heavy or frequent on a large motor, or available fault current demands a higher-capacity frame and coordination combination, move to TeSys F or TeSys G. For TeSys G, exact product scope, current range, and positioning must be confirmed from current Schneider Electric catalog documentation, as field data and third-party discussion for this family remain limited.

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Where LC1D and TeSys F/G Sit in the Schneider TeSys Family

Schneider Electric's TeSys product family covers a wide span of motor control hardware — contactors, overload relays, motor protection circuit breakers, soft starters, and associated accessories — all designed to work together within a coordinated selection framework. Within that family, the TeSys D (LC1D) series is the standard-duty workhorse: a three-pole IEC power contactor with main circuit ratings up to 690 V AC, available across a broad range of frame sizes and widely stocked at distributors worldwide. The TeSys Deca generation carries forward the LC1D part numbering with updated coil technology, including TeSys Green low-consumption DC coils where some 24 V DC versions consume as little as 0.5 W, enabling direct interfacing with PLC output cards on smaller frame sizes. LC1D contactors integrate naturally with TeSys overload relays, auxiliary contact blocks, mechanical interlocks, surge suppressors, and timer modules — giving panel builders a consistent accessory ecosystem across a wide current range.

TeSys F contactors occupy the heavy-duty tier of the same ecosystem. Where LC1D covers the standard to upper-mid current range, TeSys F picks up from approximately 115 A AC-3 and extends to several hundred amps, targeting large industrial motors and severe-duty applications where LC1D frames would be operating near or beyond their limits. TeSys F frames are physically larger, require different terminal and busbar arrangements, and carry a dedicated accessory range — auxiliary blocks, interlocks, and busbar connection kits — that is not interchangeable with LC1D accessories.

TeSys G devices address high-current motor control and protection functions within the TeSys family, but their exact product scope, current rating envelope, and positioning relative to TeSys F must be taken directly from current Schneider Electric catalog documentation. Field discussion of TeSys G in engineering forums and community boards is notably sparse compared to the extensive commentary on LC1D and TeSys F, and this article will flag that gap rather than fill it with assumptions.

AC-3 Current, Motor kW, and Core Spec Comparison

The table below summarizes the key parameters that drive the LC1D versus TeSys F/G selection decision. All figures are drawn from Schneider Electric catalog data and should be verified against the specific catalog number being specified, as ratings vary by frame size and voltage.

Parameter LC1D (TeSys D / Deca) TeSys F TeSys G
Typical application range Standard small-to-medium motors in industrial and commercial applications Large industrial motors and heavy-duty applications High-current motor control/protection applications (exact scope: confirm from Schneider catalog)
Main circuit rated voltage Up to 690 V AC (IEC rating) Similar IEC voltage classes (confirm from Schneider catalog) To be confirmed from Schneider catalog
AC-3 current range (typical) Approx. 9 A to 150 A depending on frame Approx. 115 A to several hundred amps depending on catalog number To be confirmed from Schneider catalog
Typical motor power at 400 V Up to approx. 75 kW (largest frames) Up to several hundred kW (specific values from Schneider catalog) To be confirmed from Schneider catalog
Mechanical endurance High mechanical life suitable for frequent operation (cite specific catalog values for selected frame) Suitable mechanical endurance for large motors with less frequent starts (confirm per catalog) To be confirmed from Schneider catalog
Family accessories Wide range: auxiliary blocks, surge suppressors, interlocks, timers, TeSys Green coils Dedicated auxiliaries, interlocks, busbar connection kits; fewer total accessory types but tailored to large frames Accessories specific to its function; check Schneider catalog
Typical installation context MCCs and control panels for motors up to mid-range kW MCCs and main feeders for large drives in heavy industry High-current motor starters and feeders (confirm scope)

Full technical specifications and catalog-number-level data are available on the product pages at LeadTime.ca.

Aspect LC1D (TeSys D / Deca) TeSys F/G
Integration in TeSys motor starters Direct integration with TeSys overload relays and protection devices across full LC1D range Integrates with matching TeSys overload and protection devices; confirm compatibility per Schneider selector
Compatibility with Schneider overload relays Wide overload relay compatibility within TeSys D family Dedicated overload relay compatibility for TeSys F/G; not interchangeable with LC1D accessories
Low-consumption coil availability TeSys Green coils available; some 24 V DC versions approx. 0.5 W consumption Coil options available; confirm low-consumption variants from current Schneider catalog
PLC interfacing ease Direct PLC output control possible on smaller frames with Green coils; confirm VA for larger frames Larger coil VA on big frames may require interposing relays or control transformers
Engineering documentation depth Extensive; wide community knowledge base and Schneider documentation Solid documentation; less community discussion than LC1D
Suitability in standard vs. custom feeders Well suited to standard MCC designs and OEM panels Preferred for custom large-motor feeder and main drive applications
Aspect LC1D (TeSys D / Deca) TeSys F/G
Relative unit cost per contactor Lower; wide range across frame sizes Significantly higher; scales with current rating
Typical stocking in distribution Widely stocked; commonly available off the shelf Larger frames more often special order or with extended lead times
Lead time for common ratings Short for most popular LC1D catalog numbers Longer for large-frame TeSys F/G; confirm with distributor before committing to schedule
Spare parts availability High; widely held at distributor and plant level Lower; deliberate spare stocking strategy recommended for critical drives
Impact on enclosure and busbar cost Compact footprint keeps enclosure and copper costs lower Larger frame increases enclosure depth, cable/busbar routing costs, and handling labour

Pricing for specific catalog numbers is available on the product page at LeadTime.ca, or contact for current pricing on TeSys F/G frames.

Typical Applications and Deployment Scenarios

LC1D (TeSys D / Deca) contactors appear across a wide spectrum of standard industrial motor applications: pump and fan starters in water and wastewater plants, HVAC motor feeders in commercial and district energy buildings, and OEM machine panels where motors in the 11–75 kW range at 400–480 V are the norm. The compact footprint and rich accessory ecosystem make LC1D the default choice for multi-motor MCCs where panel density matters and motors operate with normal duty cycles.

TeSys F contactors are found where the motor nameplate — and the fault level behind it — pushes beyond what LC1D frames handle with confidence. Crusher and mill drives in mining and aggregates, large compressors in oil and gas, boiler feed pumps and large circulating pumps in utilities, and primary fan drives in pulp and paper mills are all natural TeSys F territory. The common thread is not just motor size but the combination of high full-load current, heavy or frequent starting duty, and elevated short-circuit levels from stiff utility transformers close to the MCC.

Large HVAC applications — chillers above 200 kW, cooling tower fans on district energy systems, and large air-handling units — also increasingly call for TeSys F where motor FLC exceeds the LC1D envelope and where continuous duty at high ambient temperature makes thermal margin a real concern rather than a footnote.

Application Typical Deployment
Medium pump or fan (15–75 kW at 400–460 V) LC1D upper frame size — normal duty, standard MCC, moderate fault level
High-torque crusher or mill motor (110–160 kW) TeSys F — heavy starting duty, high inertia load, elevated SCCR requirement
Large fan or blower (200–315 kW) TeSys F with matching motor protection device — continuous duty, large enclosure, thermal margin required
OEM skid with mixed motor sizes (11–90 kW) LC1D for motors clearly within its AC-3 envelope; TeSys F for the largest or heaviest-duty motors on the skid
Retrofit after transformer upgrade (increased fault level) Evaluate marginal LC1D starters for upgrade to TeSys F/G plus coordinated protection to meet new SCCR
Large chiller or refrigeration compressor (above 200 kW) TeSys F — high FLC, critical process duty, justifies heavy-duty frame cost

Six Real-World Selection Scenarios

Scenario 1 — Medium-large pump at 55–75 kW, 400–460 V: Normal duty, moderate short-circuit level, standard industrial environment. If motor FLC and AC-3 duty fit within the LC1D catalog rating at the actual voltage with reasonable margin, and protection coordination is satisfied, LC1D at the appropriate upper frame size is the right answer. It keeps cost and footprint controlled and maintains access to the full LC1D accessory range.

Scenario 2 — High-torque crusher motor at 110–160 kW: Heavy starting torque, frequent starts, and a stiff utility transformer with high available fault current make this a TeSys F application. AC-3 current at this motor size exceeds LC1D's envelope, duty severity demands higher electrical and mechanical endurance, and SCCR coordination with upstream protection requires the larger frame's capacity. Attempting to force an LC1D here risks both under-rating and coordination failures.

Scenario 3 — Large fan or blower at 200–315 kW: Continuous duty, long run times, and high FLC point firmly to TeSys F, potentially combined with a matching motor protection circuit breaker or TeSys G protection device as per Schneider's design guidance for that power level. At these ratings, enclosure depth and busbar routing must be planned for TeSys F frame dimensions, and derating for high ambient temperature should be evaluated during engineering.

Scenario 4 — Existing plant with aging large contactors at 90–132 kW: When legacy large contactors approach end-of-life and motors are 90–132 kW, two paths exist. For motors that fall within LC1D's AC-3 limits at the operating voltage, redesigning the feeder around LC1D can simplify spare parts and reduce cost — if the short-circuit coordination also works. For motors above that threshold, replace like-for-like with TeSys F frames to minimize redesign scope. The key variable is whether the motor current and fault level actually require TeSys F, not just habit or previous practice.

Scenario 5 — OEM skid with mixed motor sizes from 11 kW to 90 kW: Use LC1D for all motors that fall clearly within its AC-3 envelope. Reserve TeSys F for the one or two largest motors, particularly those with heavy starting duty or at sites with high available fault current. Keeping TeSys F frames to the minimum justified by engineering reduces BOM complexity, lowers panel cost, and simplifies spare parts stocking on the skid.

Scenario 6 — Retrofit after transformer upgrade raising fault level: A transformer replacement that increases available short-circuit current at the MCC can push previously acceptable LC1D-based starters into marginal or non-compliant SCCR territory even if the motors themselves have not changed. For starters near the LC1D current limit where the new fault level cannot be coordinated within the LC1D family, upgrading to TeSys F/G plus matching protection is the correct response. This is a coordination-driven decision, not a motor-size decision — an important distinction when reviewing which starters actually need changing.

Coil Options, Accessories, and Control Integration

One of the practical advantages of LC1D (TeSys D / Deca) in standard MCC design is the density of its accessory ecosystem. Auxiliary contact blocks, mechanical interlocks for reversing starters, surge suppressors, pneumatic timer modules, and TeSys Green low-consumption coils are all designed to attach directly to LC1D frames within a consistent form factor. TeSys Green DC coils on smaller LC1D frames can consume as little as 0.5 W at 24 V DC, which matters when multiple starters share a control power supply or when PLC output card current limits are a design constraint. For larger LC1D frames and for TeSys F coils, control VA increases significantly and may require interposing relays or a dedicated control transformer — confirm coil voltage, frequency, and VA requirements from the Schneider catalog for the specific catalog number being used.

TeSys F frames carry their own dedicated accessory range: auxiliary blocks, mechanical interlocks, and busbar connection kits designed for large-frame physical dimensions and higher current-carrying requirements. These accessories are not interchangeable with LC1D items, and attempting to fit LC1D auxiliary blocks or interlocks onto TeSys F contactors is a documented source of ordering errors in the field. The same principle applies in reverse — TeSys G accessories are specific to TeSys G devices and should not be assumed compatible with TeSys F without explicit confirmation from Schneider's compatibility documentation.

Short-Circuit Coordination and SCCR — Where It Gets Critical

Short-circuit current rating (SCCR) and protection coordination are frequently the deciding factors in LC1D versus TeSys F/G selections, yet many engineers initially approach the question purely from motor kW. The correct sequence is to determine motor FLC, then check that the chosen contactor family and frame, combined with the upstream protection device, achieves the required SCCR and coordination type (Type 1 or Type 2) at the actual available fault current. Schneider publishes coordination tables linking specific LC1D and TeSys F catalog numbers to compatible protective devices and the resulting coordination data — these tables are the authoritative reference and must be consulted for the specific combination being used.

A motor starter that passes the AC-3 current check but fails coordination at a higher post-transformer fault level is not a compliant design. This is why Scenario 6 above — the transformer upgrade retrofit — is a real and recurring engineering problem. TeSys F/G frames, by virtue of their higher current capacity and physical construction, are able to form coordinated combinations with protection devices at fault levels that exceed what LC1D combinations can achieve. Where that higher fault capacity is needed, moving to TeSys F/G is the correct engineering decision regardless of whether the motor size itself has changed.

Panel Footprint, Wiring, and Busbar Considerations

LC1D contactors are noted for their compact footprint relative to their AC-3 current rating, which is one of the reasons they dominate standard MCC designs for medium motors. A panel housing multiple LC1D-based starters for motors in the 15–75 kW range will be substantially smaller than an equivalent panel built around TeSys F frames for the same motor count — a meaningful cost and space difference in large projects.

Key installation considerations when working with TeSys F/G frames include:

  • TeSys F/G frames require greater enclosure depth and width than LC1D equivalents at similar kW ratings; enclosure selection must account for this early in the panel design
  • Large TeSys F/G frames typically require busbar connection kits and terminal adaptors rather than standard wire terminations used with LC1D — confirm connection method and kit part numbers from Schneider accessories documentation
  • Creepage and clearance requirements increase at higher current ratings; verify that enclosure layout meets IEC 60947 and applicable CSA/UL requirements for the specific frame
  • Temperature rise in enclosed panels is a greater concern for large-frame contactors; consult Schneider derating curves for the installed ambient temperature when specifying TeSys F/G in sealed or poorly ventilated enclosures
  • Follow manufacturer installation instructions and apply lockout/tagout procedures before any installation, wiring, or maintenance work on energized switchgear

Expert Verdict: How to Draw the Line Between LC1D and TeSys F/G

For the majority of industrial motor feeder designs, LC1D (TeSys D / Deca) is the correct starting point and often the correct finish point. It covers AC-3 currents from approximately 9 A to around 150 A, handles motors up to about 75 kW at 400 V depending on frame, offers a mature accessory ecosystem, carries excellent documentation depth, and is widely stocked for fast delivery. Engineers designing MCCs for standard pumps, fans, compressors, and conveyors in that power band — with normal duty cycles and moderate short-circuit levels — will find that LC1D meets the engineering requirements without the cost premium and panel size penalty of moving to larger frames. The TeSys Green coil technology adds a practical advantage for PLC-interfaced starters where control power budgets are tight, and the consistency of the LC1D accessory range across frame sizes simplifies panel standardization across multi-motor installations.

TeSys F becomes the right choice the moment any one of the critical parameters moves outside LC1D territory: motor FLC at the operating voltage exceeds the LC1D AC-3 rating for available frame sizes, starting duty is severe or very frequent on a large motor, or the available fault current demands a coordination combination that LC1D cannot satisfy. At those boundaries, the correct response is a deliberate step to TeSys F — not an attempt to push LC1D beyond its published ratings with derating arguments or by selecting a theoretically adjacent catalog number. TeSys G addresses high-current motor control and protection functions within the TeSys family, but engineers should extract all TeSys G scope, current data, and application guidance directly from current Schneider Electric documentation rather than from community forums, where TeSys G discussion remains sparse. Specific alternative models for any given high-current application should be confirmed with Schneider selection tools using the motor FLC, voltage, duty class, and fault level as inputs.

From a procurement standpoint, LC1D frames are straightforwardly available with short lead times for common catalog numbers. TeSys F/G frames at larger ratings are more often special order or carry longer lead times, which makes advance planning and early confirmation with a specialist distributor important for project schedules. If you are finalizing a BOM for a large motor feeder and need confirmation that the catalog number you have selected is in stock and ships to your location, check current availability directly on the product page at LeadTime.ca — the team can also help interpret coordination tables and confirm accessory compatibility for specific frame combinations.

For volume pricing on multiple contactor frames or to confirm lead time before committing to a build schedule, contact the LeadTime.ca team directly — we ship worldwide.

What Engineers Are Saying About LC1D vs TeSys F/G

Across automation forums including Reddit's r/PLC and r/industrialautomation, PLCTalk, and Schneider Electric's own community boards, the LC1D (TeSys D / Deca) family consistently draws the kind of quiet confidence that comes from years of broad field use. Engineers describe it as the "go-to" contactor for standard industrial motors — compact, well-documented, easy to accessorize, and available when needed. Recurring praise focuses on documentation consistency across generations of the product and the practical depth of the accessory range. The main friction point that surfaces in community threads is the transition to newer TeSys Deca part numbers and TeSys Green coil designations, where engineers familiar with older LC1D catalog numbers have encountered confusion about what has changed and what remains backward-compatible with existing auxiliary blocks and interlocks.

TeSys F receives a different kind of respect in forum discussions — engineers who use it tend to describe it as solid, heavy-duty equipment that is chosen deliberately for large motors and harsh duty rather than selected by default. The recurring complaints are predictable: it is physically large, it is more expensive, and it is less likely to be sitting on a distributor shelf when it is needed urgently. A pattern that appears in multiple threads is engineers discovering compatibility issues when attempting to fit newer accessories or motor protection devices onto older TeSys F frames, with the consensus being that Schneider's accessory compatibility lists are the authoritative reference and should be consulted before assuming any cross-generation or cross-family fit. Discussion specific to TeSys G in open engineering forums is sparse enough that any engineer making a TeSys G selection should treat community sentiment as absent rather than positive — current Schneider documentation is the only reliable guide for that family.

The most common question pattern in community discussions about this comparison follows a consistent theme: "How do I know when LC1D is no longer enough?" The short answer that experienced engineers give — and the same answer this article supports — is that the boundary is defined by motor full-load current at the actual voltage, duty class, and fault level, not by kW rules of thumb. Engineers who have worked through the Schneider coordination tables and AC-3 current charts for both families tend to find that LC1D handles more applications than expected when duty is genuinely standard, while TeSys F turns out to be unavoidable for anything with heavy starting or elevated fault levels at large motor sizes. The consistent advice from practitioners is to run the numbers using Schneider's selection tools rather than relying on approximate kW boundaries.

Five Selection Mistakes That Lead to Wrong Orders

These are the five most common technical and procurement errors that engineers and buyers encounter when specifying LC1D versus TeSys F/G for high-power motors:

1. Sizing from motor kW alone, ignoring FLC and AC-3 rating. Nominal kW at one voltage does not directly translate to the AC-3 current rating needed for contactor selection. Motor FLC varies by efficiency class, service factor, and actual operating voltage. Always size from FLC and the AC-3 current table for the specific LC1D or TeSys F catalog number at the actual line voltage.

2. Selecting for AC-3 current without checking coordination. A contactor frame that meets the AC-3 current requirement may still be non-compliant if the available short-circuit current at the starter exceeds what the contactor-plus-protection combination achieves in Schneider's coordination tables. Check Type 1 and Type 2 coordination for the exact catalog combination and the fault level at the board.

3. Assuming accessories are interchangeable between LC1D and TeSys F/G. Auxiliary blocks, mechanical interlocks, and other add-on components are family-specific. LC1D accessories do not fit TeSys F frames, and TeSys G accessories should not be assumed compatible with TeSys F without explicit Schneider confirmation. Use the accessory compatibility chart for each family.

4. Over-specifying TeSys F/G without engineering justification. Using large TeSys F/G frames for motors that LC1D handles comfortably adds cost, increases panel size, and lengthens lead time without delivering a safety or reliability benefit. Apply the defined margin per standards and Schneider guidance, but avoid arbitrary oversizing driven by unfamiliarity with LC1D's upper-frame capabilities.

5. Ordering the correct frame with the wrong coil voltage. Selecting the right contactor family and frame size but ordering a coil voltage or frequency incompatible with the available control power is a recurring cause of rework. For large TeSys F/G frames, coil VA is higher and may exceed the capacity of an existing control transformer or PLC output card. Confirm coil voltage, frequency, and VA for every catalog number before ordering.

Wrong-Part Prevention Checklist

Before placing an order for any LC1D or TeSys F/G contactor, work through this checklist verbatim:

  1. Confirm motor full-load current (FLC) and AC-3 duty versus the specific LC1D or TeSys F catalog rating at the actual line voltage.
  2. Check short-circuit current at the motor starter and confirm contactor plus protection coordination per Schneider tables (Type 1/2 coordination).
  3. Confirm that the chosen frame supports the overload relay or motor protection device family planned (e.g., TeSys overload relay range compatibility).
  4. Verify control coil voltage and frequency match the control system and available control power.
  5. Check enclosure space, creepage/clearance, and wiring method; large TeSys F/G frames can require more depth and busbar kits.
  6. Avoid mixing accessories (auxiliary blocks, mechanical interlocks) across incompatible TeSys families.
  7. For very frequent switching or heavy starting, confirm mechanical and electrical endurance ratings for the exact catalog number.

If any item on this checklist cannot be confirmed from the catalog data in hand, contact the LeadTime.ca team before ordering — our application specialists can help verify selections against Schneider coordination documentation and confirm availability for your project timeline.

Frequently Asked Questions

What is the largest motor I can run on an LC1D contactor at 400 V, and what happens when I exceed that?

Based on Schneider Electric catalog data, TeSys D (LC1D) contactors cover AC-3 currents from approximately 9 A up to around 150 A depending on frame size, corresponding to motors up to about 75 kW at 400 V for the largest standard LC1D frames. Exceeding that boundary means the motor FLC exceeds the AC-3 rating of the largest available LC1D frame at that voltage, at which point TeSys F is the correct family to evaluate. Always verify the exact rating for the specific catalog number against Schneider AC-3 tables at your operating voltage, since efficiency class, service factor, and actual running current all affect the margin.

Can I reuse my existing TeSys D overload relay when I upgrade a motor starter to TeSys F?

No — overload relays in the TeSys family are not interchangeable across LC1D (TeSys D) and TeSys F frames. TeSys F contactors require overload relays or motor protection devices from the compatible TeSys F range, which are different in physical form and electrical rating from TeSys D overload relays. When upgrading a starter from LC1D to TeSys F, plan to replace the overload relay as part of the project and confirm the new combination against Schneider compatibility documentation.

Is TeSys F always the right choice for a 90 kW motor, or can a large LC1D still work?

This depends on motor FLC at the actual operating voltage, starting duty, and available fault current — not on the 90 kW figure alone. For a 90 kW motor at 400 V with normal duty and moderate fault levels, verify the FLC against LC1D AC-3 ratings for the largest available frame. If the current fits with adequate margin and coordination is achieved, LC1D may be technically valid. If FLC is at or near the LC1D limit, or duty is heavy or fault level is high, TeSys F is the appropriate choice. Run the numbers using Schneider catalog data rather than applying a fixed kW boundary.

Do LC1D and TeSys F use the same mechanical interlocks for reversing starters?

No. Mechanical interlocks are family-specific and are not interchangeable between LC1D (TeSys D) and TeSys F contactors. Each family has dedicated interlock accessories designed for its own frame dimensions and mounting arrangement. Attempting to fit LC1D interlocks to TeSys F frames is a documented source of ordering errors; use the accessory compatibility charts for each family and specify interlocks by the catalog numbers listed for the contactor frame in use.

How do I account for high ambient temperature when choosing between LC1D and TeSys F/G?

Both LC1D and TeSys F/G frames are subject to current derating in elevated ambient temperatures inside enclosed panels. Schneider publishes derating curves for each family and frame size. For large TeSys F/G frames operating in hot or poorly ventilated enclosures, the effective AC-3 current rating at elevated temperature may be meaningfully lower than the catalog value at the standard reference temperature. Evaluate derating during engineering using Schneider's published curves, and consider whether thermal derating shifts the motor current outside the selected contactor's rated range at worst-case ambient conditions.

What documentation should I consult before finalizing an LC1D or TeSys F/G selection?

For any motor starter design, consult Schneider Electric's current TeSys D (LC1D) and TeSys F product catalogs for AC-3 current and kW tables at your operating voltage, Schneider's coordination tables for the contactor-plus-protection combination at the available fault level, and the accessory compatibility charts for auxiliary blocks, interlocks, and overload relays. For TeSys G, use only current Schneider catalog documentation, as community and third-party data for that family are limited. This article supports but does not replace formal engineering calculations or compliance verification against IEC 60947, CSA, or UL standards applicable to your installation.

Why Order Through LeadTime.ca

  • LeadTime.ca ships worldwide — LC1D frames for standard motor starters and TeSys F/G frames for large-drive applications can be sourced and dispatched globally
  • Application specialists can help cross-reference Schneider catalog numbers, confirm LC1D versus TeSys F/G suitability for specific motor and fault data, and identify compatible overload relays and accessories
  • Larger TeSys F/G frames are frequently special-order items with extended lead times — early confirmation with a specialist distributor protects project schedules
  • Volume pricing is available for multi-frame MCC projects and plant standardization programs; contact for current pricing before finalizing BOMs
  • Sourcing hard-to-find specific frame sizes and accessory kits across the TeSys range is a core capability

At-a-Glance Summary

  • LC1D (TeSys D / Deca) covers AC-3 currents from approximately 9 A to 150 A depending on frame, up to about 75 kW at 400 V for the largest standard frames
  • TeSys F picks up from approximately 115 A AC-3 and extends to several hundred amps, addressing large industrial motors up to several hundred kW at 400 V
  • LC1D main circuit rated voltage is up to 690 V AC (IEC); TeSys F carries similar IEC voltage class ratings — confirm from Schneider catalog for each catalog number
  • TeSys Green coils on LC1D (some 24 V DC versions approx. 0.5 W) enable direct PLC output interfacing on smaller frames; large TeSys F coils have higher VA and may require interposing relays
  • LC1D accessories (auxiliary blocks, interlocks, surge suppressors, timers) are not interchangeable with TeSys F/G accessories — stay within each designated family
  • Short-circuit coordination (Type 1/Type 2) and SCCR must be verified against Schneider coordination tables for the specific contactor-plus-protection combination at the available fault level — this drives TeSys F/G selection as often as motor FLC does
  • LC1D is widely stocked with short lead times for common catalog numbers; large TeSys F/G frames are more often special order — plan accordingly
  • TeSys G scope, current rating, and application guidance must come from current Schneider Electric catalog documentation; community field data for TeSys G is sparse
  • This guide supports but does not replace formal engineering calculations and compliance verification against IEC 60947, CSA, and UL standards applicable to your installation

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