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Grey Siemens BQ2B030 two-pole breaker with toggle actuator and bolt-on lugs

SIEMENS

SIEMENS BQ2B030 Circuit Breaker BQ Series 30A 2 Pole 120/240V AC

SKU CH-R0JY-ZKN6E

A 30 A, two-pole bolt-on breaker rated 120/240 V AC with 10 kA interrupting capacity for Siemens panelboards

  • Reliable overload protection with 10 kA interrupting rating at 120/240V AC
  • Fits standard Siemens panelboards using bolt-on mounting style
  • Handles 30 A loads across two poles for single-phase circuits
  • Accepts wire sizes from 14 AWG copper to 6 AWG maximum
  • Operates safely up to 104 °F maximum ambient temperature

Siemens BQ2B030 30 A Bolt-On Breaker

The Siemens BQ2B030 is a standard miniature circuit breaker rated at 30 A and 120/240 V AC. It uses a two-pole, bolt-on design that fits compatible Siemens panelboards. The toggle actuator provides manual switching and clear trip indication. A 10 kA interrupting rating handles typical residential fault currents.

Two-Pole Protection for Compatible Load Centres

This breaker suits electricians and homeowners adding a 240 V circuit such as a dryer, water heater or sub-panel in a Siemens load centre. It accepts copper wire from 14 AWG to 6 AWG and aluminium from 12 AWG to 6 AWG. Installers needing a plug-on style, a different ampere rating, or a DC rating should select another model.

10 kA Interrupting Rating at 120/240 V AC

The decisive specification is the maximum AIR of 10 kA at the rated voltage. If the panelboard or local code requires a higher interrupting capacity, this breaker will not meet that requirement. Verify the available fault current before specifying this device.

How it compares

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Price $120.99
Pricier than about 73% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

What comes in the box with the SIEMENS BQ2B030 and what must be purchased separately?

The breaker itself is supplied; mounting hardware and panelboard bus connections are part of the host enclosure, while 12 to 6 AWG copper or 12 to 6 AWG aluminium conductors are sourced separately.

How do I choose between the available versions of this 30 A two-pole breaker?

Only one version is listed — 30 A, two-pole, 120/240 V AC, bolt-on mounting, 10 kA interrupting rating — so selection is simply confirming those ratings match the panelboard schedule.

What does the 10 kA AIR rating mean once the breaker is installed in a real panel?

It indicates the breaker can safely interrupt up to 10 000 amps of fault current at 120/240 V AC, provided the panelboard’s available fault current does not exceed that value.

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