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Siemens BQ2B050H Molded Case Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
Siemens
BQ2B050H
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ2B050H
Quantity
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Siemens BQ2B050H - 50A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens BQ2B050H - 50A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ2B050H |
| Series | BQ |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | BQ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
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Quantity
Siemens BQ2B050H - 50A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ2B050H-R |
| Series | BQ |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | BQ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
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Description
Engineered for demanding systems, the Siemens BQ2B050H delivers 50 amps of thermal-magnetic protection. This 2-pole MCCB is ideal for commercial power distribution networks. The unit mounts via a secure bolt-on connection, making it compatible with standard Siemens panelboards. It comes equipped with load side lugs that accept 8-6 AWG copper conductors. With a 22 kAIC rating at 120/240VAC, it safely handles fault currents. The breaker is HACR rated and complies with UL 489 standards.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQ2B050H |
| Series | BQ |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | BQ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhat is the difference between the Siemens BQ2B050 and the BQ2B050H?
The H in the BQ2B050H catalog number indicates a higher interrupting rating. While the standard BQ2B050 is rated for 10 kAIC, the BQ2B050H is rated for 22 kAIC at 120/240VAC, making it suitable for systems with higher available fault current.
Which panelboards are compatible with the BQ2B050H circuit breaker?
This breaker is designed for use in compatible Siemens bolt-on panelboards and distribution equipment that accept BQ or BQH frame types. Always verify the panelboard label for approved breaker types before installation.
Is the Siemens BQ2B050H suitable for use with HVAC equipment?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration motor group applications.
What wire sizes are accepted by the lugs on this 50A breaker?
The factory-installed load side lugs accept 8 to 6 AWG copper conductors, or 8 to 4 AWG aluminum conductors. Ensure proper torque is applied during installation according to the manufacturer specifications.
Can I use the BQ2B050H in a plug-on load center?
No, this is a bolt-on molded case circuit breaker. It must be mechanically bolted to the panel busbar and is not compatible with plug-on load centers.
Does this breaker provide ground fault or arc fault protection?
No, the BQ2B050H features a standard thermal magnetic trip unit for overload and short-circuit protection. It does not include GFCI or AFCI functionality.
What does the LI trip function code mean on this breaker?
The LI designation means the breaker includes Long-Time and Instantaneous trip functions. The long-time function protects against sustained overloads, while the instantaneous function trips immediately during a short-circuit.
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