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Grey Square D EDB24040 miniature circuit breaker, two toggle poles, bolt-on lugs, 5.66 by 1.96 by 4.05 inches

SQUARE D

SQUARE D EDB24040 Miniature Circuit Breaker E FRAME 40A 2 Pole

SKU CH-TEYK-2PE68

Protects 40 A single-phase circuits with 18 kA interrupting capacity at 277/480 V AC, bolt-on mounting for Square D NF panelboards

  • 40 A rated current protects circuits reliably
  • 277/480 V AC rating suits industrial panels
  • 18 kA interrupting rating clears faults safely
  • Bolt-on mounting fits NF panelboards directly
  • Toggle actuator enables quick manual control

Application fit

The SQUARE D EDB24040 is a 40 A miniature circuit breaker from the E FRAME series built for Square D NF panelboards. It serves single-phase loads where a two-pole, bolt-on device rated 277/480 V AC and 125 V DC is specified. Contractors and facility engineers select it when panel space and series compatibility are fixed by the NF platform.

Interface limits

The breaker carries a maximum AIR rating of 18 kA at 277/480 V AC and uses a standard toggle actuator. Its terminal connection is a lug type suited to the frame size of 125 A. Operation is rated up to 104 degrees Fahrenheit, so ambient conditions beyond that envelope require a different device.

Build and mounting

Bolt-on mounting secures the unit directly to the NF panelboard bus, reducing the chance of loose connections over time. The compact footprint of 5.66 in length, 1.96 in width and 4.05 in depth fits standard NF pole spacing without forcing panel redesign. Lug terminals accept the conductors used in typical branch-circuit wiring for this frame class.

Highlights

  • 40 A rated current protects circuits reliably
  • 277/480 V AC rating suits industrial panels
  • 18 kA interrupting rating clears faults safely
  • Bolt-on mounting fits NF panelboards directly
  • Toggle actuator enables quick manual control

Specifications

BrandSQUARE D

Questions about this item

How do I choose between the EDB frame sizes for my panel?

This breaker uses the 125A EDB frame and fits Square D NF panelboards with bolt-on mounting.

What does the 18kA interrupting rating mean when the breaker is installed?

It can safely clear a fault current up to 18kA at 277/480V AC in a compatible NF panelboard.

Does the bolt-on connection limit the breaker to a specific bus type?

Yes, the bolt-on lug terminals are designed for Square D NF series panelboards only.

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