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Siemens BQCH2B050 Molded Case Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
Siemens
BQCH2B050
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQCH2B050
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Siemens BQCH2B050 - 50A 2 Pole Molded Case Circuit Breaker
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50A 2 Pole Molded Case Circuit Breaker
50A 2 Pole Molded Case Circuit Breaker
Description
Built for commercial environments, this 50A two-pole breaker ensures consistent thermal-magnetic protection. The unit fastens securely into Siemens P1, P2, and P3 panelboards using a standard bolt-on connection. Note that this specific model is officially replaced by the BQD250 series. Featuring a 65kAIC rating at 240VAC, it provides substantial fault current mitigation. It includes a trip-free mechanism and quick-make/quick-break operation for enhanced safety.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQCH2B050-R |
| Series | BQCH |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 14kA @ 480Y/277VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 8-1 AWG (Cu), 6-1/0 AWG (Al) |
| Max Wire | 1 AWG (Cu), 1/0 AWG (Al) |
| Min Wire | 8 AWG (Cu), 6 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
5 answersWhich panelboards are compatible with the Siemens BQCH2B050 circuit breaker?
This breaker is specifically designed for bolt-on installation in Siemens P1, P2, and P3 commercial panelboards. It is not compatible with standard plug-on residential load centers.
What type of wire can be used with the BQCH2B050 terminals?
The factory-installed lugs accept both copper and aluminum conductors. The supported wire range is 8 to 1 AWG for copper and 6 to 1/0 AWG for aluminum. Ensure you use the correct wire gauge based on your application and local electrical codes.
How does the BQCH series differ from standard BQ breakers in terms of fault ratings?
The BQCH series is designed for higher fault current applications. While standard BQ breakers typically offer a 10kAIC rating, the BQCH2B050 provides an elevated 65kAIC rating at 240VAC and 14kAIC at 480Y/277VAC, making it suitable for commercial systems with higher available fault currents.
Is there a direct replacement for the legacy BQCH2B050?
Yes, the BQCH series is a legacy product line. Siemens has officially replaced it with the BQD series. For a 50A, 2-pole application, the BQD250 serves as the modern drop-in substitute for P1, P2, and P3 panelboards.
What trip functions are included in the BQCH2B050?
This thermal-magnetic breaker features fixed Long-Time and Instantaneous trip functions. The thermal element provides delayed protection against sustained overloads, while the magnetic element trips instantly in the event of a short circuit.
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