SIEMENS
SIEMENS BL 50 A 1-pole 120/240 V AC bolt-on circuit breaker
Single-pole 50 A bolt-on breaker rated 120/240 V AC with 10 kA interrupting capacity for Siemens P1 panels
- TypeCircuit Breakers
- 50 A single-pole protection for residential circuits
- 10 kA interrupting rating handles fault currents safely
- Bolt-on mounting fits Siemens P1 panelboards directly
- 120/240 V AC rating covers standard household voltages
- 8 AWG minimum wire size supports robust conductor connections
Siemens BL 50 A Single-Pole Breaker
This Siemens BL series circuit breaker is a single-pole, bolt-on device rated at 50 amps for 120/240 V AC systems. It fits Siemens P1 panelboards and load centres, providing standard overcurrent protection with a 10 kA interrupting rating at the rated voltage. The toggle actuator allows manual switching, and the lug terminals accept wire sizes down to 8 AWG. It is built on a 125 A frame in a compact 3.6 in length.
Suited For Siemens P1 Panels
Electricians and facility managers maintaining or expanding Siemens P1 load centres will find this breaker a direct fit for single-phase branch circuits requiring 50 A protection. It is not suitable for panels of other brands or series, for three-phase applications, or for circuits needing DC voltage ratings. Installers requiring a two-pole or higher interrupting capacity device should look elsewhere.
50 A Rating Decides Fit
The 50 A current rating is the primary specification that determines whether this breaker matches the circuit design. The conductor ampacity and the load calculation must align with this value for code-compliant protection. The 10 kA AIR rating at 120/240 V AC must also meet the available fault current at the installation point. Verify both figures against the project requirements before purchase.
Highlights
- 50 A single-pole protection for residential circuits
- 10 kA interrupting rating handles fault currents safely
- Bolt-on mounting fits Siemens P1 panelboards directly
- 120/240 V AC rating covers standard household voltages
- 8 AWG minimum wire size supports robust conductor connections
Specifications
| Brand | Siemens |
|---|---|
| Type | Circuit Breakers |
Questions about this item
How do I bolt the BL 50 A breaker into a Siemens P1 panelboard, and what torque should I use on the lug?
Align the bolt-on base with the P1 panelboard bus, secure the mounting screw, then insert 8 AWG minimum copper wire into the lug and tighten to the torque value printed on the breaker label.
What part will need replacement after the BL 50 A breaker trips repeatedly?
The breaker itself is the replaceable component; after repeated over-current trips the internal mechanism can degrade, so replace the entire BL series unit rather than attempting internal repair.
At what fault current does the BL 50 A breaker reach its interrupting limit?
The maximum AIR rating is 10 kA at 120/240 V AC; any available fault current above that level exceeds the breaker’s tested interrupting capacity.
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