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Grey Square D EDB24030 miniature circuit breaker, two toggle poles, bolt-on lugs, compact industrial finish

SQUARE D

SQUARE D EDB24030 circuit breaker 30A 2 pole 277/480V 18kA

SKU CH-ZK7E-49Z30

A 30 A, 2-pole miniature breaker rated 277/480 V AC with 18 kA interrupting capacity for Square D NF panelboards

  • 30 A protection for two-pole circuits at 277/480 V AC
  • 18 kA interrupting rating clears high fault currents safely
  • Bolt-on mounting fits Square D NF panelboards directly
  • Lug terminals accept conductors without extra accessories
  • Operates up to 104 °F ambient temperature

EDB Series 30 A Double-Pole Breaker

The SQUARE D EDB24030 is a miniature circuit breaker rated 30 amperes with two poles for 277/480 V AC and 125 V DC systems. It carries an 18 kA interrupting rating at the AC voltage and mounts by bolt-on lug terminals into Square D NF panelboards. The toggle actuator provides manual on-off control within a 125 A frame size.

Suits NF Panelboard Circuits, Not Other Load Centres

This breaker fits panels that accept the EDB frame and bolt-on connection method, making it appropriate for commercial and industrial branch-circuit protection where the NF series is specified. Installers working with incompatible load-centre families or plug-on mounting rails will need a different frame style.

Bolt-On Lug Terminal Frees Panel Space

The 5.66 in by 1.96 in by 4.05 in body mounts directly to the bus via the supplied lug, leaving adjacent pole positions open for additional devices. Operating temperature reaches 104 degrees Fahrenheit, so enclosure ventilation should accommodate that limit. No extra mounting hardware is required beyond the panelboard's bolt-on provisions.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $420.99
Pricier than about 90% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSQUARE D

Questions about this item

What Square D panelboard series must I already have for this EDB24030 breaker to bolt on correctly?

It is designed for Square D NF panelboards; the breaker will not fit other series without an adapter.

Will this 30 A, two-pole breaker coordinate with an older 125 A EDB frame main breaker already installed in the same panel?

Yes, both share the 125 A EDB frame size and 18 kA interrupting rating at 277/480 V AC, so selective coordination is maintained.

After installation, how can I confirm the breaker is operating within its rated limits?

Verify the toggle stays engaged under load, measure phase current at or below 30 A, and ensure ambient temperature does not exceed 104 °F.

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