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Grey moulded-case three-pole breaker with front lugs and toggle handle

SIEMENS

SIEMENS ED43B030 Circuit Breaker 30A 3 Pole 480V AC

SKU CH-P3MH-Z23X6

Three-pole molded-case breaker rated 30 A at 480 V AC with 18 kA interrupting capacity for Sentron panelboards

  • 30 A thermal-magnetic protection for three-phase circuits
  • 480 V AC rating with 18 kA interrupting capacity
  • Fixed 30 A trip setting ensures consistent overload response
  • 125 A ED-frame lug-in design fits Sentron panelboards
  • Three-pole ABC phase connection for balanced distribution

Industrial circuit protection for three-phase

The Siemens ED43B030 is a 30 A three-pole molded case breaker rated for 480 V AC. It fits Sentron panelboards and SB switchboards using the ED4 frame size of 125 A. Electrical contractors and facility engineers use it for branch-circuit protection in commercial and light-industrial installations.

Fixed thermal-magnetic trip

The breaker carries a maximum AIR rating of 18 kA at 480 V AC and offers no adjustable trip settings; both high and low trip points are fixed at 30 A. It is not rated for DC voltage, so it cannot be applied in direct-current circuits. The instantaneous trip function is also fixed, limiting coordination flexibility in selective-tripping schemes.

Lug-in panelboard mounting with load-side lugs

Installation uses a lug-in mounting style and load-side lug terminals, which suit standard panelboard bus arrangements. The fixed trip curve means the device cannot be field-adjusted for motor-starting inrush or selective coordination studies. DC-rated applications and adjustable-trip requirements fall outside this model's capabilities.

How it compares

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

Price $1,516.99
Pricier than about 93% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

Should I choose the 30 A version or a different amp rating for my panel?

This breaker is fixed at 30 A with both high and low trip settings at 30 A, so select it only when the circuit requires exactly that rating.

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

It indicates the breaker can safely interrupt up to 18 kA of fault current at 480 V AC, protecting downstream equipment during a short circuit.

Will the three-pole 480 V AC rating work on a standard three-phase panel?

Yes, the breaker is a three-pole, 480 V AC thermal-magnetic unit with ABC phase connection, designed for three-phase lug-in panelboard mounting.

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