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Grey Square D EDB24020 miniature circuit breaker, bolt-on two-pole toggle, 5.66 by 1.96 by 4.05 inches

SQUARE D

SQUARE D EDB24020 Miniature Circuit Breaker 20A 2 Pole

SKU CH-QCJ9-5SFR4

A 20 A, two-pole miniature breaker rated 18 kA at 277/480 V AC for Square D NF panelboards

  • 20 A rating protects standard branch circuits
  • 18 kA interrupting capacity clears heavy fault currents
  • Bolt-on mounting fits Square D NF panelboards directly
  • Toggle actuator gives clear on/off indication
  • Compact 5.66 in frame saves enclosure space

SQUARE D EDB 20 A 2-pole breaker

This SQUARE D EDB24020 miniature circuit breaker delivers 20 A overcurrent protection for single-phase loads on a 277/480 V AC system. It mounts by bolt-on connection into compatible Square D NF panelboards and uses a toggle actuator for manual switching.

For NF panelboard circuits needing 20 A two-pole

Electricians wiring lighting, HVAC or receptacle branches in commercial panels rated for the EDB series will find this breaker a direct fit. Installations requiring a DC rating, a plug-on mounting style or a frame size above 125 A must select a different device.

18 kA interrupting rating at 277/480 V AC

The breaker carries a maximum AIR of 18 kA at its rated voltage, which determines whether it can safely clear the available fault current on the circuit. Verify the panelboard’s short-circuit rating before specifying this unit.

How it compares

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Price $397.99
Pricier than about 90% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSQUARE D

Questions about this item

How many amps will the EDB24020 carry continuously before the thermal trip activates?

The breaker is rated for 20 A continuous current; the thermal element opens when that limit is exceeded for a sustained period.

What temperature rise should I expect inside the enclosure when the breaker runs at full load all day?

The maximum operating temperature is 104 °F, so the enclosure must stay at or below that ambient to avoid nuisance tripping.

Which panelboard series must already be installed for this bolt-on breaker to fit?

It is designed for Square D NF panelboards and will not mount in other series.

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