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Square D EDB34045 three-pole miniature circuit breaker, bolt-on mount, toggle actuator, grey industrial finish

SQUARE D

SQUARE D EDB34045 Miniature Circuit Breaker 45A 3 Pole

SKU CH-AVTX-931T7

Miniature circuit breaker rated 45 A with three poles, 18 kA interrupting at 277/480 V AC and 125/250 V DC, bolt-on mounting for Square D NF panelboards

  • Three-pole protection for three-phase circuits
  • 45 A rating handles substantial branch loads
  • 18 kA interrupting capacity at 277/480 V AC
  • Bolt-on mounting fits Square D NF panelboards
  • Compact 5.66 × 2.94 × 4.05 in frame saves panel space

EDB34045 45 A three-pole breaker

The SQUARE D EDB34045 is a bolt-on miniature circuit breaker rated 45 A at 277/480 V AC and 125/250 V DC. It installs directly into Square D NF panelboards and provides three-pole protection for three-phase loads. The toggle actuator gives clear on/off indication for maintenance and emergency switching. Frame size is 125 A EDB.

18 kA interrupting capacity

The breaker carries an 18 kA AIR rating at 277/480 V AC, suitable for typical commercial and light-industrial fault levels. It will handle continuous 45 A loads within its 104 °F maximum operating temperature. Higher fault currents or ambient temperatures beyond this limit require a different protective device. The lug terminals accept standard conductor sizes for the frame.

Bolt-on mounting for NF panelboards

Compatibility is limited to Square D NF series panelboards and load centres; the breaker will not fit other manufacturers' enclosures or Square D series with different mounting footprints. Three-pole construction occupies three adjacent pole spaces in the panel. Verify the panelboard schedule and available space before ordering.

Highlights

  • Three-pole protection for three-phase circuits
  • 45 A rating handles substantial branch loads
  • 18 kA interrupting capacity at 277/480 V AC
  • Bolt-on mounting fits Square D NF panelboards
  • Compact 5.66 × 2.94 × 4.05 in frame saves panel space

Specifications

BrandSQUARE D

Questions about this item

Will the 45 A, 3-pole EDB breaker fit in my existing Square D NF panelboard?

Yes, it is designed for Square D NF panelboards and uses a bolt-on mounting style with a 125 A EDB frame size.

How can I confirm the breaker is operating correctly after installation?

Switch the toggle actuator to the on position and verify that the circuit carries load up to 45 A without tripping, staying within the 104 °F maximum operating temperature.

Does the breaker come with line and load lugs or must they be purchased separately?

The unit includes a terminal connection lug for cable termination.

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