Schneider Electric LC1K0910M7 — 9A TeSys K Contactor Selection Guide

By Abdullah Zahid
14 min read
Schneider Electric LC1K0910M7 TeSys K 3-pole 9A contactor with 220-230V AC coil for motor control panel installation

Schneider Electric LC1K0910M7 TeSys K Contactor, 3-Pole, AC-3, 9A at 440V, 1NO Auxiliary Contact, 220-230V AC 50/60Hz Coil — Specs, Selection Guide and Alternatives

Controls engineers and panel builders searching for a compact, reliable 9A motor contactor with a 220-230V AC coil have a clear candidate in the Schneider Electric LC1K0910M7. This 3-pole electromechanical contactor is rated 9A AC-3 at 440V — sufficient for motor loads up to 4 kW at 400V — and carries a single 1NO auxiliary contact for signaling or interlocking. What settles the decision quickly is verifying two hard constraints: your control supply is 220-230V AC at 50 or 60 Hz, and your motor's full-load current does not exceed 9A on any phase. If both check out, this is a well-proven, space-efficient choice from the TeSys K series.

If you have already confirmed this is the right part, check current pricing and availability for the LC1K0910M7 at LeadTime.ca — ships worldwide.

Who Should Buy the LC1K0910M7 — and Who Shouldn't

This contactor is the right choice for engineers and technicians who meet all of the following criteria:

  • Control supply voltage is confirmed at 220-230V AC, 50 or 60 Hz — not 24V DC, not 380V
  • Motor full-load current on each phase does not exceed 9A under AC-3 duty (motor switching on the run)
  • Panel uses 35mm DIN rail or accepts a screw-panel mount and has adequate height clearance for the TeSys K footprint
  • Application requires exactly 1NO auxiliary contact for status indication or interlocking — not 2NO or 1NO+1NC combinations
  • Motor load is an AC induction type — pump, fan, compressor, or conveyor drive rated up to 4 kW at 400V
  • UL Listed, CSA Certified, and IEC 60947-4-1 compliant hardware is required for your jurisdiction

If your motor draws more than 9A AC-3, move to the LC1K1210M7 (12A) or LC1K2510M7 (25A). If your control system runs on 24V DC, the correct model is the LC1K0910B7 — the B7 suffix designates a 24V DC coil. This model is not suitable for DC load switching or single-phase motor applications without field modification.

On this page:

What the LC1K0910M7 Actually Does in a Motor Control Circuit

The LC1K0910M7 is a switch — a fast, reliable, electrically operated switch built specifically for repeated motor circuit switching under load. When the 220-230V AC coil receives its control signal, three normally open main contacts close in 10 to 20 milliseconds, connecting the motor's three phases to the supply. When the coil de-energizes, the contacts open and the motor circuit breaks. That cycle can repeat up to 3,600 times per hour under rated conditions, and the mechanical structure is rated for 20,000,000 no-load operations under EN/ISO 13849-1 testing — translating to years of continuous duty before mechanical inspection is warranted.

What the LC1K0910M7 does not do is protect the motor. The contactor has no built-in thermal overload, no short-circuit protection, and no phase-loss detection. For a complete motor starter, it must be paired with a thermal overload relay or motor circuit breaker in series. This is not a limitation unique to this model — it is the standard architecture for IEC motor control. The contactor switches; the overload relay protects. Together they form a compliant motor starter per IEC 60947-4-1.

The 1NO auxiliary contact on this unit operates in parallel with the main coil status. When the coil is energized and the main contacts are closed, the auxiliary contact closes as well. This is used for seal-in circuits, status indication to a PLC input card, or interlocking with other contactors in a multi-motor sequence. Its minimum operating current is 5 mA at a minimum of 17V, making it compatible with standard 24V PLC digital inputs without additional signal conditioning.

Typical System Architecture for a TeSys K Motor Starter

The LC1K0910M7 sits in the power path between the branch circuit protection and the motor terminals. Understanding its place in the full chain prevents wiring errors and specification gaps.

  • Upstream branch circuit protection — a fuse rated 25A gG or 25A aM, or a motor circuit breaker — provides short-circuit protection ahead of the contactor
  • LC1K0910M7 main contacts (terminals 1/L1, 3/L2, 5/L3 to 2/T1, 4/T2, 6/T3) carry the three motor phases and open or close on command from the coil
  • Thermal overload relay mounted downstream of the contactor (or integrated as a combination starter) senses motor current on all three phases and trips the circuit on sustained overload
  • Motor terminals receive the switched, protected three-phase supply — typically 400V or 440V AC for a 4 kW load
  • Coil terminals A1 and A2 connect to the 220-230V AC control circuit, which may be driven by a PLC output, a push-button station, or a relay output — the auxiliary 1NO contact feeds a status signal back to the control system

Where Engineers Deploy the LC1K0910M7

Pump control is the most common single application for this model. Circulation pumps, booster pumps, and condensate return pumps in HVAC and process systems routinely fall in the 2-4 kW range with full-load currents between 5A and 9A at 400-440V. The LC1K0910M7 handles this duty with margin, and its compact footprint fits neatly into pre-engineered pump control panels where space per circuit is tight.

Fan and air handler motor control is equally common. Cooling tower fans, exhaust fans, and air handling unit supply fans in the 4 kW class are standard candidates. The dual 50/60 Hz coil rating is a genuine advantage here: equipment built for international deployment can use a single contactor SKU across North American and European installations without re-specifying the coil voltage variant.

Compressor staging systems, particularly in refrigeration and HVAC chiller plants, use multiple contactors of this class to sequence compressor cylinders or unloaders. The 3,600 cycles-per-hour operating rate and high mechanical cycle life make the LC1K0910M7 a reliable choice in applications where the contactor energizes and de-energizes many times per shift.

Retrofit and replacement scenarios account for a significant share of LC1K0910M7 orders. When an older, bulkier contactor fails in an existing panel and the engineer needs to reclaim space or standardize on the TeSys K platform, the LC1K0910M7 provides a compact drop-in solution — provided the ratings match and the DIN rail or screw mounting is compatible with the existing enclosure layout.

Application Typical Deployment
Pump motor control (HVAC / process) Single-motor starter with thermal overload relay, DIN rail in MCC or panel
Fan and air handler motor control Multi-contactor panel for staged fan control; dual 50/60Hz supports international equipment
Compressor cylinder staging Multiple LC1K0910M7 units in sequence control; high cycle rate application
Conveyor and machine tool drives Paired with thermal overload in compact machine panel; PLC-controlled via coil circuit
System retrofit and panel space recovery Replacement of larger legacy contactor; DIN rail compatibility simplifies swap
Multi-motor OEM equipment Several units per panel for parallel motor control; standardized coil voltage simplifies BOM

LC1K0910M7 Key Specifications

Parameter Rating
Rated Operational Current (AC-3) 9A at 440V AC
Motor Power Rating (AC-3) 4 kW at 400V, 50/60 Hz
Coil Voltage 220-230V AC, 50/60 Hz
Coil Inrush Power 30 VA at 68°F (20°C)
Coil Hold-in Power 4.5 VA at 68°F (20°C)
Main Contact Configuration 3NO (3-pole, normally open)
Auxiliary Contact 1NO
Operating Rate 3,600 cycles/hour
Mechanical Life (B10d) 20,000,000 cycles (no-load, per EN/ISO 13849-1)
Certifications UL Listed, CSA Certified, IEC 60947-4-1, VDE 0660, BS 5424

Full technical specifications are available on the product page at LeadTime.ca.

LC1K0910M7 vs. LC1K1210M7 vs. Alternatives: Which One Do You Actually Need?

Model Manufacturer Current Rating (AC-3) Coil Voltage Motor Power at 400V Key Difference
LC1K0910M7 Schneider Electric 9A 220-230V AC 4 kW Baseline — this model
LC1K0910B7 Schneider Electric 9A 24V DC 4 kW 24V DC coil for PLC/logic controller integration
LC1K1210M7 Schneider Electric 12A 220-230V AC 5.5 kW Higher current for larger motors
LC1K2510M7 Schneider Electric 25A 220-230V AC 11 kW Significantly larger motor loads
3TB44 (Siemens) Siemens 9A 220V AC 4 kW Standard SIRIUS size — larger footprint, different mounting
A9-30-10 (ABB) ABB 9A 230V AC 4 kW Standard A9 footprint — larger than TeSys K
DILM9-10 (Eaton) Eaton 9A 230V AC 4 kW Compact DIL — similar footprint; verify terminal and mounting compatibility before cross-referencing

If your motor's full-load current is above 9A, the LC1K1210M7 is the correct next step — do not attempt to run a 10A or 12A motor load through the LC1K0910M7. Check current availability of the LC1K0910M7 and related TeSys K variants at LeadTime.ca.

Expert Verdict: When This Contactor Earns Its Place and When It Doesn't

The LC1K0910M7 is the right choice for controls engineers and system integrators who are specifying compact motor control panels with 220-230V AC control power and motor loads at or below 4 kW at 400V. Its 3,600 cycles-per-hour operating rate makes it suitable for applications that switch frequently, not just occasional starts. The 20,000,000-cycle mechanical life rating reflects a design built for continuous industrial duty, and the dual 50/60 Hz coil operation means a single stocked part covers both North American and international equipment without requiring separate SKUs. Maintenance technicians replacing a failed contactor in an existing 220V AC circuit will find this a straightforward, well-documented swap — provided they verify the ratings match exactly before pulling the trigger on an order.

There are three situations where this model is genuinely the wrong choice, and being honest about them matters. First, if your control system runs on 24V DC — common in modern PLC-driven panels — the LC1K0910B7 is the correct model; the M7 coil suffix designates 220-230V AC and the coil will not function on DC. Second, if your motor draws more than 9A AC-3, even briefly under starting conditions that exceed the AC-3 duty envelope, the contacts will degrade prematurely — step up to the LC1K1210M7 or LC1K2510M7 with margin to spare. Third, this is an open-frame contactor that requires installation inside a suitable enclosure; it is not rated for washdown or outdoor exposed mounting.

From a procurement standpoint, the LC1K0910M7 is a normally stocked part at authorized Schneider Electric distributors, with typical lead times ranging from same-day to next-business-day for standard quantities. For urgent replacement scenarios — a pump station down, a compressor offline — that stock position matters. Buying through a specialist industrial automation distributor adds a layer of technical verification that a generic online retailer cannot provide: confirmation that the model suffix, coil voltage, and current rating all match your specific circuit before the part ships. View current pricing and stock status for the LC1K0910M7 at LeadTime.ca — we ship to facilities worldwide.

For volume pricing on multi-unit panel builds or to confirm lead time before committing to a production schedule, contact the LeadTime.ca team directly — we ship worldwide.

What Engineers Need to Know Before Ordering the LC1K0910M7

Community discussions specifically about the LC1K0910M7 or the broader TeSys K LC1K series are not widely documented in public industrial automation forums. This contactor is typically specified and deployed through industrial integrators, OEM panel builders, and maintenance departments rather than through the hobbyist or early-career channels where forum activity tends to concentrate. What exists in place of community feedback is a well-documented pattern of specification errors that specialist distributors and application engineers encounter repeatedly — and understanding these patterns is more valuable than any forum thread.

The most common ordering error is coil voltage confusion. The model suffix tells the full story: M7 means 220-230V AC coil; B7 means 24V DC coil. Engineers who are retrofitting older panels sometimes inherit a wiring diagram that specifies a coil voltage different from the actual control supply — particularly in panels that have been modified over the years. The fix is simple: verify the actual voltage present at the coil terminals A1 and A2 before specifying the model suffix. Applying 24V DC to an M7 coil will not energize the contactor. Applying 220V AC to a B7 coil will destroy it immediately.

The second pattern is under-specification for future loads. A motor rated 8.5A today that is expected to be upgraded to a 10-12A motor within the next two years creates a quiet risk if the panel is built around the 9A LC1K0910M7. The cost difference between the LC1K0910M7 and the LC1K1210M7 is marginal; the cost of replacing a welded contactor after an overload event — including downtime, labor, and potential motor damage — is not. If there is any credible plan to increase motor size, specify the next rating up from the start. When in doubt about sizing or application fit, a specialist distributor can walk through the motor nameplate data and confirm the correct model before the order is placed — that conversation costs nothing and prevents expensive commissioning surprises.

Installation and Wiring Overview

The following points cover the key requirements for mounting and connecting the LC1K0910M7. For full wiring diagrams and detailed installation procedures, refer to the official Schneider Electric instruction sheet supplied with the product or available from se.com.

  • Mount on a 35mm DIN rail or secure directly to the panel backplate using the screw-mount option; verify height clearance in the enclosure before positioning
  • Connect three motor phase conductors to main terminals 1/L1, 3/L2, 5/L3 (line side) and 2/T1, 4/T2, 6/T3 (load side); apply 1.3 Nm torque to each screw clamp terminal using a Philips #2 or 6mm flat screwdriver
  • Connect 220-230V AC control supply to coil terminals A1 and A2; coil pickup voltage range is 0.8–1.15 Uc and drop-out range is 0.2–0.75 Uc at 50°C — verify control supply voltage is within pickup range before commissioning
  • Wire the 1NO auxiliary contact (terminals 13 and 14) into the control or signaling circuit; minimum auxiliary circuit current is 5 mA at a minimum of 17V — compatible with standard 24V PLC digital inputs
  • Always install upstream branch circuit protection (25A gG or 25A aM fuse) and a thermal overload relay in series on the load side — the contactor provides no built-in overload or short-circuit protection

Wrong-Part Prevention Checklist

Before placing your order, work through each item below. These are the six checks that prevent the most common specification errors on this model:

  1. Confirm coil voltage is 220-230V AC, not 24V DC or 380/400V
  2. Verify current rating of your motor circuit does not exceed 9A AC-3
  3. Check that 35mm DIN rail mounting works in your enclosure (height clearance needed)
  4. Confirm you need exactly 1NO auxiliary contact (not 2NO or combinations)
  5. Verify operating frequency is 50/60Hz compatible (standard in North America)
  6. Check that external overload relay or circuit protection is provided (contactor does not include built-in breaker)

If any item on this checklist raises a question, contact the LeadTime.ca team before ordering — we can verify the correct model against your motor nameplate and control wiring diagram.

Frequently Asked Questions

What does the AC-3 duty rating mean and why does it matter when sizing this contactor?

AC-3 is an IEC 60947 duty classification specifically for squirrel-cage motor switching — closing on the motor at standstill and breaking the motor while it is running at speed. This is the most demanding standard switching duty for a contactor because the breaking current is the full running current with an inductive motor load. The LC1K0910M7 is rated 9A AC-3 at 440V, meaning it can safely switch this load under those conditions for its rated electrical life of approximately 1,369,863 cycles. Sizing to this rating rather than general AC-1 resistive ratings ensures the contacts are not degraded prematurely.

Can I use the LC1K0910M7 for a single-phase motor instead of a 3-phase motor?

This contactor is a 3-pole device configured for 3-phase motor circuits. Using it for a single-phase motor is not a standard application and would require field modification of the contact configuration, which is outside normal installation practice. For single-phase motor control, a 1-pole or 2-pole contactor of the appropriate rating is the correct specification.

Is external overload protection mandatory, or can I run the LC1K0910M7 alone?

External overload protection is mandatory for motor circuit compliance under IEC 60947-4-1 and North American electrical codes. The LC1K0910M7 is a contactor only — it will not detect or interrupt sustained motor overload, phase loss, or a stalled rotor condition. A thermal overload relay sized to 100-110% of the motor's full-load current, or a motor circuit breaker in series, is required to form a compliant motor starter. Installing the contactor without overload protection risks burning motor windings and welding or burning the contactor contacts.

Is the LC1K0910M7 a direct replacement for my existing 9A contactor from a different brand?

The electrical ratings — 9A AC-3, 220-230V AC coil — may match a contactor from another manufacturer, but the physical mounting footprint, terminal positions, and DIN rail clip dimensions will differ between brands. The Siemens 3TB44, ABB A9-30-10, and Eaton DILM9-10 are equivalent in electrical rating but have different physical sizes and terminal layouts. Always verify mounting compatibility and terminal spacing against your existing panel before treating any cross-reference as a direct drop-in replacement.

What do the LED or mechanical indicators tell me when troubleshooting a coil that won't energize?

The LC1K0910M7 does not include an LED indicator — its status is read mechanically or via the 1NO auxiliary contact. If the coil fails to energize, check that the control voltage at terminals A1 and A2 falls within the 0.8–1.15 Uc pickup range (176-265V for a 220V rated coil). If voltage is present but the coil does not pull in, test coil continuity with a multimeter. An open-circuit coil reading indicates the coil winding has failed and the contactor should be replaced. Also verify screw clamp connections are tight and free of corrosion at the coil terminals.

Does the M7 coil suffix mean this contactor works on both 50 Hz and 60 Hz systems?

Yes. The LC1K0910M7 coil is rated 220-230V AC at both 50 Hz and 60 Hz without modification or derating. This is a design feature of the TeSys K coil and allows the same part number to be used in North American 60 Hz installations and European or international 50 Hz systems. No separate SKU is required for frequency-specific deployment.

Why Order Through LeadTime.ca

  • Authorized distributor access to Schneider Electric TeSys K product line — confirmed stock of LC1K0910M7 and related variants
  • Technical pre-order verification — confirm coil voltage, current rating, and auxiliary contact configuration match your application before the part ships
  • Global shipping to facilities worldwide — not limited to any single region
  • Volume pricing available for multi-unit panel builds — contact the team directly for quantity quotes
  • Fast response on urgent replacement orders — specialist knowledge of the TeSys K product family means no time wasted on wrong-variant substitutions

At-a-Glance Summary

  • Model: Schneider Electric LC1K0910M7 — TeSys K 3-pole electromechanical contactor
  • Current rating: 9A AC-3 at 440V — suitable for motor loads up to 4 kW at 400V
  • Coil: 220-230V AC, 50/60 Hz — coil inrush 30 VA, hold-in 4.5 VA
  • Auxiliary contact: 1NO — minimum 5 mA at 17V for signaling circuits
  • Operating rate: 3,600 cycles/hour; mechanical life B10d = 20,000,000 cycles
  • Electrical life B10d: 1,369,863 cycles at rated load per IEC 60947-4-1
  • Mounting: 35mm DIN rail or screw panel mount; screw clamp terminals at 1.3 Nm torque
  • Operating temperature: -13 to 122°F (-25 to 50°C); altitude up to 6,561 ft (2,000 m) without derating
  • Certifications: UL Listed, CSA Certified, IEC 60947-4-1, VDE 0660, BS 5424, NF C 63-110
  • Not the right model if: coil supply is 24V DC (order LC1K0910B7), motor exceeds 9A AC-3 (order LC1K1210M7 or LC1K2510M7), or application requires more than 1NO auxiliary contact

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