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White rectangular miniature circuit breaker with two black toggle switches and bolt-on mounting lugs

SIEMENS

SIEMENS B225 Miniature Circuit Breaker BL Series 25A 2 Pole 120/240V AC

SKU CH-2BK2-7P228

Miniature circuit breaker rated 25 A with 10 kA interrupting capacity for 120/240 V AC panels

  • 25 A rating protects circuits from overload
  • 2-pole design controls both hot legs
  • 10 kA interrupting capacity clears faults safely
  • Bolt-on mounting fits Siemens P1 panels
  • 120/240 V AC rating matches residential service

SIEMENS BL Series 25 A Breaker

This Siemens BL series miniature circuit breaker is a 25 A, two-pole device rated for 120/240 V AC. It uses a bolt-on mounting style and a toggle actuator for direct installation in compatible load centres. The unit carries a 10 kA interrupting rating at the rated voltage.

Suits Siemens P1 panelboards; not for other panels

Electricians wiring Siemens P1 panelboards will find the bolt-on lug terminals accept 14 AWG copper or 12 AWG aluminium conductors. Installers working with different panelboard series or requiring a plug-on mounting style must select a different breaker family.

10 kA AIR at 120/240 V AC

The maximum ampere interrupting rating of 10 kA at 120/240 V AC is the critical specification that determines whether this breaker can safely clear a fault in the intended circuit. Always verify the available fault current against this rating before installation.

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Price $98.99
Pricier than about 68% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

How do I install the B225 bolt-on breaker into a Siemens P1 panel and what is the common wiring mistake?

Mount the breaker onto the panel bus bars and secure the lug terminals; the step often missed is using 14 AWG copper or 12 AWG aluminium minimum wire size for the 25 A rating.

What maintenance or replacement will the B225 need over its service life?

The breaker is a sealed unit with no user-serviceable parts; replace it if it trips repeatedly, shows contact discoloration, or after a fault exceeds the 10 kA interrupting rating at 120/240 V AC.

What limit appears first when the B225 runs continuously at full load?

The 25 A thermal trip curve opens the circuit before the 10 kA short-circuit rating is reached, so sustained overload is the first protection limit encountered.

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