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
Grey Siemens BL series bolt-on circuit breaker, two toggle poles, 50A 120/240V AC rating

SIEMENS

SIEMENS B250H BL Series 50A 2 Pole 120/240V AC Circuit Breaker

SKU CH-TERN-GG0D8

Two-pole 50 A breaker rated 120/240 V AC with a 22 kA interrupting capacity for Siemens P1 panelboards

  • Reliable overload protection backed by a 22kA interrupting rating
  • Handles 50A loads on 120/240V AC single-phase circuits
  • Fits Siemens P1 panelboards with bolt-on mounting
  • Standard toggle actuator for clear on/off indication
  • Accepts wire down to 8 AWG via lug terminals

Siemens BL Series 50 A Bolt-On Breaker

This Siemens BL Series miniature circuit breaker provides 50 A, 2-pole protection for 120/240 V AC single-phase panels. It mounts by bolt-on connection and carries a 22 kA interrupting rating at 120/240 V AC. The toggle actuator gives clear on/off indication for residential and light-commercial load centres.

Installers wiring Siemens P1 load centres

Electricians fitting Siemens P1 panelboards will find this breaker a direct fit for the BL bus. The 8 AWG minimum wire size suits typical branch circuits up to 50 A. Buyers needing a plug-on variant, a DC-rated device, or a frame larger than 125 A should select a different series.

22 kA interrupting rating at 120/240 V AC

The 22 kA AIR rating is the single figure that determines whether this breaker meets the available fault current at the panel. If the system calculation demands a higher interrupting capacity, this model cannot be used and a higher-rated frame must be specified.

How it compares

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

Price $192.99
Pricier than about 81% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

How is the bolt-on breaker secured in a Siemens P1 panel, and which step is often missed?

The breaker bolts directly to the P1 panel bus using the supplied lug terminals; the step often missed is torquing the lugs to the panel manufacturer's specification to ensure a solid connection.

What maintenance will the toggle actuator and lug terminals need over time?

Periodically exercise the toggle actuator to prevent mechanical binding and inspect the lug terminals for signs of overheating or corrosion; re-torque if the panel schedule calls for it.

At what fault-current level does the 22 kA interrupting rating become the limiting factor?

The breaker is rated to safely interrupt up to 22 kA at 120/240 V AC; available fault current above that level exceeds its interrupting capacity and requires a higher-rated device.

More in Breakers & Circuit Protection

Similar items