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Siemens B150 Molded Case Circuit Breaker
- 50A
- 1 Pole
- Bolt-On
Siemens
B150
Molded Case Circuit Breaker
Brand
Siemens
SKU
B150
Quantity
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Siemens B150 - 50A 1 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens B150 - 50A 1 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B150 |
| Series | B |
| Amperage | 50A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment, Handle Tie |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed, Trip-Free Mechanism |
Sold out
Quantity
Siemens B150 - 50A 1 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B150-R |
| Series | B |
| Amperage | 50A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment, Handle Tie |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed, Trip-Free Mechanism |
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Description
Part of the B-frame family, this 50-amp thermal-magnetic device delivers standard 10kAIC interrupting capacity for commercial electrical systems. The bolt-on design ensures a secure connection within Siemens P1, P2, P3, P4, and P5 panelboards, making it ideal for demanding environments. Featuring fixed long-time and instantaneous trip functions, it serves as a robust solution for branch circuit protection while maintaining an HACR rating for HVAC equipment compatibility.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B150 |
| Series | B |
| Amperage | 50A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment, Handle Tie |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed, Trip-Free Mechanism |
Product FAQs
6 answersWhich Siemens panelboards accept the B150 circuit breaker?
This bolt-on breaker is engineered specifically for Siemens P1, P2, P3, P4, and P5 commercial power panels. It is not compatible with standard residential plug-on load centers.
Is the Siemens B150 the same as a Type BL breaker?
Yes, the B150 is a Type BL low voltage molded case circuit breaker. You may frequently see it referenced as catalog number BL150 or as a B-frame bolt-on breaker.
What type of wire can I use with the B150 terminal lugs?
The integrated lugs are rated for both copper and aluminum conductors. They accept 8 to 6 AWG copper wire or 8 to 4 AWG aluminum wire. Always verify local codes and apply the manufacturer specified torque during installation.
How does the thermal magnetic trip unit in the B150 operate?
The breaker features fixed long-time and instantaneous (LI) trip functions. The thermal component responds to sustained overloads by heating a bimetallic strip, while the magnetic component reacts immediately to high current short circuits.
Can the B150 be used for HVAC equipment?
Yes, Siemens Type BL breakers like the B150 are HACR rated, meaning they are tested and approved for use with heating, air conditioning, and refrigeration equipment branch circuits.
Does the B150 require a separate mounting hardware kit?
As a bolt-on breaker, it secures directly to the panelboard bus using integrated mounting screws. No separate plug-on hardware is required, ensuring a highly secure connection in commercial environments.
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