B150 – SIEMENS 1P50A 120V BOLT ON 10kA BREAKER

Standard · 50A · 1-Pole · 120V · Bolt-On

The B150 – SIEMENS 1P50A 120V Bolt-On Breaker is a reliable circuit protection solution designed for efficiency and safety. With a 10kA interrupting capacity, it effectively safeguards against overloads and short circuits. Ideal for residential and commercial applications, this breaker ensures optimal performance and lasting durability for your electrical needs.

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SKU SIEB150 Categories , ,
Specifications
BrandSiemens
TypeStandard (Thermal-Magnetic)
Amperage50 A
Poles1-Pole
Voltage120V
Interrupting Rating10 kA
MountingBolt-On
Frame / SeriesB
Catalogue #B150
Panel Compatibility

The Siemens B150 is a bolt-on style breaker from Siemens' BL/BA bolt-on series, designed to mount in compatible Siemens/ITE panelboards and loadcentres — including EQ, ES, PL, and PN series panels that accept bolt-on breakers. It is rated 1-pole, 50A, 120V with a 10kA interrupting capacity, suitable for residential and light commercial panel applications.

Bolt-on breakers are not interchangeable with plug-on (QP/QT) breakers — confirm your panel's busbar type before ordering. Send us your panel model number and we'll confirm fitment.

The B-series (e.g., B150) uses a bolt-on connection to the panel busbar, secured with a fastener, while QP-series breakers simply plug onto the bus. The two styles are not interchangeable — your panel must specifically accept bolt-on breakers. Check your loadcentre's label or contact us and we'll help you identify the right type.

Yes. The B150 is rated 1-pole, 120V, 50A with a 10kA interrupting capacity, making it appropriate for single-pole 120V branch circuits in residential and light commercial panels where the available fault current does not exceed 10kA. Always verify the fault-current level at your panel with a qualified electrician to ensure the breaker's interrupting rating is adequate.

Availability of specific bolt-on frame breakers can vary. Northern Breaker Group specializes in obsolete and hard-to-find breakers and maintains an extensive inventory across our Calgary, Edmonton, and Vancouver locations. Contact us with your requirements and we'll advise on current stock or sourcing options.

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