We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Siemens BQ series 25A three-pole miniature circuit breaker, bolt-on mount, toggle actuator

SIEMENS

SIEMENS BQ3B025 Miniature Circuit Breaker 25A 3 Pole 240V AC

SKU CH-F0X0-6ZG64

Three-pole miniature circuit breaker rated 25 A at 240 V AC with a 10 kA interrupting capacity for Siemens panelboards

  • 25 A three-pole protection for 240 V AC circuits
  • 10 kA interrupting rating at 240 V AC
  • Bolt-on mounting fits Siemens panelboards directly
  • Terminal lugs accept 14–6 AWG copper or 12–6 AWG aluminium
  • Rated for operation up to 104 °F

Three-pole protection for Siemens panels

This Siemens BQ3B025 miniature circuit breaker provides three-pole overcurrent protection at 25 A and 240 V AC. It is built for bolt-on installation in compatible Siemens panelboards using the BQ series frame. The 10 kA interrupting rating at 240 V AC handles typical residential and light commercial fault currents. A toggle actuator gives clear on-off indication for maintenance staff.

Suited for 25 A three-phase loads on BQ frames

Electricians wiring three-phase circuits rated at 25 A in a Siemens BQ panelboard will find this breaker matches the frame size and mounting style. It accepts copper wire from 14 AWG to 6 AWG and aluminium from 12 AWG to 6 AWG. Installers needing a different ampere rating, a different number of poles, or a DIN-rail mount should select another model. The unit is not rated for DC applications.

25 A rating on a 125 A BQ frame

The decisive specification is the 25 A trip rating within the 125 A BQ frame size. This combination determines whether the breaker fits the panelboard slot and protects the intended conductor size. Verify the panelboard schedule calls for a 25 A three-pole BQ breaker before ordering.

How it compares

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

Price $441.99
Pricier than about 90% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

Will the bolt-on terminals need periodic re-torquing after installation?

The lug terminals accept copper wire from 14 AWG up to 6 AWG and aluminium from 12 AWG up to 6 AWG; a correct initial torque to Siemens specifications is the only required tightening.

What stops the breaker from carrying more than 25 amps continuously?

The thermal-magnetic trip unit is calibrated to open at 25 A; sustained overloads above that rating will cause the mechanism to trip.

How hot does the 3-pole unit get inside a panel running all day at full load?

The device is rated for a maximum operating temperature of 104 degrees Fahrenheit, so the enclosure must provide enough ventilation to keep ambient temperature at or below that level.

More in Breakers & Circuit Protection

Similar items