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Compact grey moulded case breaker with two toggle switches and lug terminals

SIEMENS

SIEMENS ED42B030 Molded Case Circuit Breaker 30A 2P 480V AC

SKU CH-638Q-RH898

A 30 A, two-pole molded-case breaker rated 480 V AC and 250 V DC with 18 kA interrupting capacity for panelboard mounting

  • 30 A thermal-magnetic protection for reliable overload and short-circuit response
  • 18 kA interrupting rating at 480 V AC handles high fault currents safely
  • Two-pole design breaks both conductors for complete single-phase circuit isolation
  • Lug-in panelboard mounting fits Sentron panelboards and SB switchboards without modification
  • Fixed 30 A trip setting with 125 A frame provides consistent coordination in distribution systems

SIEMENS ED4 Series 30 A Breaker

The SIEMENS ED42B030 is a moulded-case circuit breaker rated at 30 amps with a 480 V AC maximum. It uses thermal-magnetic trip technology and provides an 18 kA interrupting rating at 480 V AC for reliable overcurrent protection.

Two-pole lug-in panelboard mounting

This two-pole unit fits lug-in style panelboards such as SB switchboards and Sentron panelboards. It accepts load-side lug connections and operates on single-phase or DC systems up to 250 V DC with any phase connection.

Fixed instantaneous trip in 125 A frame

The breaker has fixed instantaneous trip settings with both high and low amp trip points set at 30 A. It sits in a 125 A ED frame size, delivering consistent thermal-magnetic performance without adjustable elements.

How it compares

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

Price $1,162.99
Pricier than about 92% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

Will the 30 A thermal-magnetic trip handle continuous 30 A loads without nuisance tripping?

Yes — the low and high trip settings are both fixed at 30 A, so the breaker holds rated current and trips only on sustained overload or short circuit.

How much heat and noise does the ED4 frame produce when carrying 30 A all day?

The molded-case design runs silently; temperature rise stays within UL limits for a 125 A frame carrying 30 A continuously.

Which panelboards accept this lug-in 2-pole breaker?

It mounts in Sentron panelboards and SB switchboards that take ED-series lug-in frames.

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