Schneider 28909 Switch Disconnector — Specs & Selection Guide

By Abdullah Zahid
14 min read
Schneider Electric 28909 Compact INS100 100A 4-pole switch disconnector with black rotary handle for industrial panel installation

Switch Disconnector, Compact INS100, 100A, Standard Version with Black Rotary Handle, 4 Poles — Schneider 28909 Specs, Selection & Buying Guide

If you are a panel builder or controls engineer with a circuit diagram in hand and a 100A 4-pole isolation requirement to fill, the Schneider 28909 is likely already on your shortlist. This is a non-automatic, 4-pole load-break switch disconnector rated at 100A, with a voltage range spanning 690V AC at 50/60 Hz down to 250V DC, an 8 kV impulse withstand rating, and a breaking capacity of 20 kA standalone or 154 kA when coordinated with an upstream protection circuit breaker. The question is not whether this is a capable part — it is — but whether it is the right configuration for your exact application before you commit to an order.

If you have already confirmed the 28909 matches your pole count, voltage class, and breaking capacity requirement, check current pricing and availability at LeadTime.ca — we ship worldwide.

Who Should Buy the Schneider 28909 — and Who Shouldn't

The Schneider 28909 is the right choice for panel builders and systems integrators who need a compact, manually operated 4-pole isolator for 100A branch circuits in industrial or commercial installations. Confirm all of the following before ordering:

  • Your circuit requires 4-pole isolation — this model is 4P; 2-pole variants exist in the same family
  • Your rated operating voltage matches one of the listed classes: 690V AC, 480V NEMA, 440/480V, 380/415V, 220/240V AC, or 250V DC
  • Your available fault level is at or below 20 kA standalone, or you have a coordinating upstream breaker to achieve the 154 kA rated system breaking capacity
  • Your panel accommodates the compact footprint: 11.8 mm wide, 13.5 mm high, 15.5 mm deep
  • Your project compliance requirements align with IEC 60947-1 and IEC 60947-3
  • You require positive contact indication — this model includes visible break confirmation

If you need automatic overcurrent tripping, a different current rating (50A, 63A, or above 100A), or a 2-pole configuration, the 28909 is not the correct part — review the Compact INS100 family variants or consult the LeadTime.ca team for the right model number.

On this page:

What the Schneider 28909 Actually Does in a Power Distribution System

The Schneider 28909 is a non-automatic load-break switch disconnector. It does not trip on overcurrent. It does not detect faults. Its job is precise and critical: it manually isolates a branch circuit from the main power supply, confirms that the break has occurred through positive contact indication, and holds that isolation position reliably while maintenance or reconfiguration work takes place downstream.

Positive contact indication means the operator has a visual confirmation that all four poles are open — not inferred, but mechanically verified. In industrial applications where a lockout/tagout procedure is required before equipment access, this is not a convenience feature. It is a safety requirement. The black rotary handle provides a clear mechanical interface: the position of the handle directly corresponds to the contact state, and the design meets Class II insulation per IEC 60664 for frontal protection.

Where the 28909 differs from a traditional molded-case circuit breaker is in what it does not do. There is no thermal-magnetic trip mechanism, no automatic response to an overload condition, and no remote-trip capability in the base model. This is intentional. In many branch-circuit designs, the automatic protection is handled upstream by a coordinated breaker — leaving the disconnect switch to handle manual isolation cleanly. When paired with that upstream breaker, the 28909 system achieves a breaking capacity of 154 kA at 690V AC, which covers the fault exposure of most industrial distribution systems.

The Compact INS100 range was redesigned with an ergonomic front-plate that Schneider Electric attributes to a 40% reduction in wiring time versus previous-generation isolators. For panel builders assembling multiple units in a build run, this is a measurable productivity gain on the shop floor.

Where the 28909 Sits in a Typical Panel Architecture

The Schneider 28909 operates as a branch-level or main-level isolation device positioned between the upstream protective device and the downstream load or sub-distribution assembly. It does not originate protection — it provides the manual break point that an upstream breaker or fuse assembly coordinates with.

  • Utility supply or main incomer feeds a main protective circuit breaker or fused switch at the top of the distribution assembly
  • The upstream breaker provides fault protection and coordinates with the 28909 to achieve the 154 kA system breaking capacity
  • The Schneider 28909 is mounted in the panel at branch or main disconnect position, receiving the conditioned supply from the upstream device
  • Outgoing terminals from the 28909 feed motor starters, variable frequency drives, sub-panels, or other branch loads requiring manual isolation capability
  • Downstream equipment — drives, contactors, HVAC units, pump controls — is isolated from supply by rotating the 28909 black rotary handle to the OFF position, confirmed by positive contact indication

Industries and Applications That Specify the Compact INS100 100A

Motor branch circuit isolation is one of the most common deployments for the Schneider 28909. In variable frequency drive applications operating at 480V NEMA three-phase, the 4-pole 100A disconnect provides the required manual isolation point ahead of the drive — allowing safe maintenance access without de-energizing the entire panel. The 4-pole configuration is particularly important where a switched neutral is required in addition to the three phase conductors.

Control center main disconnects are another high-volume application. In multi-circuit industrial control panels fed from a 690V AC three-phase supply, the 28909 can serve as the main isolation device for the entire assembly, with the upstream protective breaker providing the fault-level coordination needed to reach the 154 kA breaking capacity rating.

Switchgear retrofit projects frequently specify the Compact INS100 family precisely because the compact footprint — 11.8 mm wide, 13.5 mm high, 15.5 mm deep, and 1.12 kg — fits into panel cutouts that cannot accommodate larger legacy frames without cabinet modification. This makes the 28909 a practical choice when upgrading aging disconnectors in space-constrained enclosures without a full panel redesign.

Pump station and HVAC installations operating at 380/415V AC 50 Hz, common in international projects, fall within the rated voltage range of the 28909. The multi-voltage rating covering 690V, 480V NEMA, 440/480V, 380/415V, and 220/240V AC makes this a single SKU that can be specified across geographically diverse project portfolios, simplifying procurement for engineering firms managing installations across multiple regions.

Application Typical Deployment
Motor branch circuit isolation 4P 100A disconnect ahead of VFD at 480V NEMA three-phase, manual lockout before maintenance
Industrial control center main disconnect Panel main isolation at 690V AC three-phase, coordinated with upstream breaker for 154 kA breaking capacity
Switchgear retrofit Drop-in replacement for legacy isolator in space-constrained cabinet; compact 11.8 mm frame width reduces rework
Pump station main disconnect 380/415V AC 50 Hz industrial supply isolation for pump and motor control at water or process facilities
HVAC equipment isolation Manual disconnect for rooftop or in-line HVAC units in commercial building electrical systems
DC circuit isolation 250V DC load-break switching in battery backup or DC distribution applications using DC-22A/DC-23A duty category

Schneider 28909 Electrical and Physical Specifications

Parameter Value
Current Rating 100A (at Ue = 690V AC)
Rated Voltage — AC 690V AC, 50/60 Hz (also rated: 480V NEMA, 440/480V, 380/415V, 220/240V AC)
Rated Voltage — DC 250V DC
Rated Insulation Voltage (Ui) 750–800V AC, 50/60 Hz
Rated Impulse Withstand Voltage 8 kV
Breaking Capacity — Standalone 20 kA at 690V AC
Breaking Capacity — With Upstream Breaker 154 kA at 690V AC
Poles 4P (4-pole)
Weight 1.12 kg
Compliance Standards IEC 60947-1, IEC 60947-3, IEC 60664-1 (Class II insulation)

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

Compact INS100 Variants: Which Configuration Do You Actually Need?

Model Poles Current Rating Key Difference
Schneider 28909 4P 100A Standard version, black rotary handle — this model
28908 variant 4P 80/100A Within same Compact INS100 family; different current or configuration — verify with distributor
Compact INS100 2P variant 2P 100A Two-pole isolation for single-phase or DC circuits where 4-pole is not required
Compact INS50 / INS63 4P 50A / 63A Lower current ratings within the INS family for smaller branch circuits
Compact INV series Various Various Related Schneider disconnect range — verify frame compatibility and ratings before substituting

If your load requirement is below 100A, or if your circuit design calls for 2-pole isolation only, the Schneider 28909 is not the correct model — check the full Compact INS100 family range at LeadTime.ca to confirm the right variant before ordering.

Expert Verdict: Is the Schneider 28909 the Right Disconnector for Your Project?

The Schneider 28909 earns its place in industrial panel builds because it solves a specific problem very well: reliable, manually operated 4-pole isolation at 100A with positive contact indication, in a compact frame that does not force a cabinet redesign. The 40% wiring-time reduction versus previous-generation designs is a documented productivity advantage for panel builders assembling builds at volume. The 8 kV impulse withstand voltage and 750–800V AC rated insulation voltage give it headroom above the typical 480V and 690V AC applications it commonly serves. For panel builders and systems integrators in North America who need Schneider ecosystem compatibility, proven IEC 60947-1 and IEC 60947-3 compliance, and a part they can source reliably from stocking distributors, this is a straightforward specification decision.

Where the 28909 is not the right answer is equally important to state clearly. If your application requires automatic overcurrent tripping or remote-trip capability, you need a molded-case circuit breaker — the 28909 will not protect against an undetected overload on its own. If your available fault current exceeds 20 kA and you do not have a coordinating upstream protective breaker in the circuit, the standalone breaking capacity is insufficient and the device should not be specified without that upstream device confirmed in the design. For low-current DC applications below 100A where a smaller frame is appropriate, the INS50 or INS63 family variants are a better fit. And if you need a configuration other than the black rotary handle standard version, confirm with your distributor before ordering — non-standard handle colors or configurations may carry extended lead times.

On the procurement side, the Schneider 28909 is available from authorized distributors carrying North American stock, with typical in-stock lead times of 3–5 days versus a 3–6 week factory lead time for units that must be sourced direct. That difference matters when you are building to a project deadline. Specialist distributors also provide the configuration verification and compliance confirmation that generic channel resellers typically cannot. For current pricing and confirmed availability before you commit a line item to your build schedule, visit the Schneider 28909 product page at LeadTime.ca — we ship worldwide.

For volume pricing, lead time confirmation across a multi-line order, or help verifying the correct variant for your voltage class, contact the LeadTime.ca team directly — we work with panel builders and procurement teams worldwide.

What Engineers Need to Know Before Ordering the Schneider 28909

Because the Schneider 28909 is a utilitarian industrial component with an established design practice around it, most experienced panel builders and controls engineers order this part based on distributor datasheets and Schneider technical documentation rather than peer forum discussion — and that reflects the product's maturity, not any deficiency. However, the absence of broad online community discussion also means there is no easily searchable record of common ordering errors to warn new specifiers. Based on distributor experience and the technical profile of this part, here is what engineers consistently get wrong when ordering this model — and what to do instead.

The most frequent ordering error is pole count confusion. The Compact INS100 family includes both 2-pole and 4-pole configurations. A buyer who skims the family catalog and sees the 100A rating without confirming the pole designation can end up with a 2-pole unit when the circuit design requires 4-pole isolation of all phases plus neutral. The 28909 is unambiguously 4-pole — but that must be verified against the circuit diagram before the purchase order is issued, not after the unit arrives on-site. A re-order in this situation carries a 3–6 week factory lead time if stock is depleted.

The second error is voltage class mismatch. The 28909 is rated across multiple voltage classes — 690V AC, 480V NEMA, 440/480V, 380/415V, 220/240V AC, and 250V DC. These are not interchangeable markings on a single universal part; the voltage class determines insulation coordination and compliance status at the installation point. Engineers specifying for North American 480V NEMA applications must confirm the correct voltage-class variant is what ships. Check the voltage marking on the incoming delivery paperwork against your schematic before installation. If there is any uncertainty about which voltage variant is correct for your application, the LeadTime.ca team can confirm the right configuration before the order is placed — which is precisely the kind of pre-order verification that a specialist distributor exists to provide.

Wiring and Installation Overview

The following is an overview of the key steps and considerations for installing the Schneider 28909. Engineers requiring full wiring diagrams, torque specifications, and detailed commissioning procedures should refer to Schneider Electric's official installation documentation for the Compact INS100 range.

  • Mount the disconnect switch in the panel cutout and verify firm mechanical seating; confirm the compact frame dimensions (11.8 mm wide, 13.5 mm high, 15.5 mm deep) are compatible with the available cutout before proceeding
  • Route incoming supply conductors — L1, L2, L3, and N for AC applications; positive and negative for 250V DC applications — to the top terminals; route outgoing load conductors from the bottom terminals to downstream circuit protection and equipment
  • If auxiliary contacts are included in the configuration, wire control circuit connections per schematic to the logic controller or indicator circuit; verify continuity of auxiliary contacts in the ON position with a multimeter before energizing
  • Test mechanical operation before energizing: the black rotary handle must move smoothly between OFF and ON positions with a positive audible click at each position; do not force a stiff handle — investigate before proceeding
  • Perform insulation resistance testing per IEC 60947-1 requirements using a megohmmeter set to the appropriate voltage class; verify proper grounding and confirm no visible physical damage before closing the circuit

Wrong-Part Prevention Checklist

Before placing your order for the Schneider 28909, verify each item on this checklist. Ordering errors on disconnect switches typically result in 3–6 week re-order cycles and delayed panel commissioning.

  1. Verify pole count matches your circuit design (this model is 4P; confirm you need 4-pole isolation)
  2. Confirm rated operating voltage matches your application (690V AC, 480V NEMA, 250V DC, etc.)
  3. Check breaking capacity requirement against your fault level (20 kA alone, 154 kA with upstream breaker providing coordination)
  4. Confirm you need visible break indicator (this model has positive contact indication)
  5. Verify handle color requirement (this model has black rotary handle; other colors available)
  6. Check compliance standards needed (IEC 60947-1, IEC 60947-3 apply to this model)
  7. Ensure compact frame size fits available panel cutout space

If any item on this checklist raises a question before you order, contact the LeadTime.ca team — we confirm configurations before orders ship, not after.

Frequently Asked Questions

Can the Schneider 28909 be used in a 250V DC application, or is it only rated for AC circuits?

The 28909 is rated for both AC and DC service. The DC rating is 250V DC, covered under duty categories DC-22A and DC-23A. If your DC application voltage exceeds 250V DC, the 28909 is not the correct part — verify your DC bus voltage against this rated value before specifying.

Does the Schneider 28909 require an upstream fuse or breaker, or can it operate standalone?

The 28909 can operate as a standalone switch-disconnector with a breaking capacity of 20 kA at 690V AC. However, if the available fault current at your installation point exceeds 20 kA, an upstream coordinating protection circuit breaker is required to achieve the rated system breaking capacity of 154 kA. Determine the available fault level at your installation before finalizing the specification.

What is the difference between the Compact INS100 and the Compact INV series from Schneider Electric?

Both the Compact INS100 and Compact INV are members of Schneider Electric's disconnect switch range, but they are distinct product families with different frame sizes, ratings, and accessory compatibility. Do not substitute one for the other without verifying that the frame dimensions, current rating, and accessory interfaces match your design. Contact your distributor to confirm the correct family before ordering.

Is the Schneider 28909 a direct retrofit for an ABB or Eaton equivalent 100A 4-pole disconnect switch?

The 28909 performs the same isolation function as equivalent 100A 4-pole disconnect switches from other manufacturers, but mounting dimensions, terminal configurations, and accessory interfaces are not guaranteed to be interchangeable. A panel designed around an ABB OT series or Eaton Moeller equivalent may require bracket or wiring modifications to accept the 28909. Verify mechanical fit using the 28909 dimensional data (11.8 mm wide, 13.5 mm high, 15.5 mm deep) against your existing cutout before ordering for a retrofit application.

What does the positive contact indication feature mean in practice during a lockout procedure?

Positive contact indication means the 28909 provides a direct mechanical confirmation that all four poles are open — the contact state is physically verified by the position indicator, not inferred from the handle position alone. In lockout/tagout procedures governed by OSHA, CSA Z460, or equivalent standards, this visible break confirmation is a key element of safe isolation verification. The black rotary handle position aligns with the contact state to provide this confirmation.

What is the typical lead time for the Schneider 28909 when ordering through a North American distributor?

When ordered from a distributor carrying Compact INS100 stock in North America, typical lead time is 3–5 days. Factory lead time for units sourced directly or through distributors without local stock is typically 3–6 weeks. Confirm stock status with your distributor before committing to a project timeline — availability varies by region and demand period.

Why Order the Schneider 28909 Through LeadTime.ca

At-a-Glance Summary

  • Model: Schneider 28909 — Switch disconnector, Compact INS100, 100A, 4-pole, black rotary handle, standard version
  • Current rating: 100A at Ue = 690V AC
  • AC voltage range: 690V, 480V NEMA, 440/480V, 380/415V, 220/240V AC at 50/60 Hz
  • DC voltage rating: 250V DC (duty categories DC-22A / DC-23A)
  • Breaking capacity: 20 kA standalone; 154 kA with upstream coordinating protection circuit breaker, both at 690V AC
  • Rated impulse withstand voltage: 8 kV
  • Rated insulation voltage (Ui): 750–800V AC, 50/60 Hz
  • Physical footprint: 11.8 mm wide × 13.5 mm high × 15.5 mm deep; weight 1.12 kg
  • Compliance: IEC 60947-1, IEC 60947-3, IEC 60664-1 Class II insulation
  • Key advantage: 40% reduction in wiring time versus previous-generation Schneider disconnectors
  • Positive contact indication: confirms visible break mechanically — required for lockout/tagout procedures
  • Typical stock lead time: 3–5 days from North American stocking distributors; 3–6 weeks factory direct
  • Not suitable for: automatic overcurrent protection, fault currents above 20 kA without upstream breaker, or 2-pole circuit designs

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