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Siemens BQ2B040H Molded Case Circuit Breaker
- 40A
- 2 Pole
- Bolt-On
Siemens
BQ2B040H
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ2B040H
Quantity
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Siemens BQ2B040H - 40A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens BQ2B040H - 40A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ2B040H |
| Series | BQ |
| Amperage | 40A |
| 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 (P1, P2, P3) |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| 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 |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Common Trip, High Interrupting Capacity |
Sold out
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Siemens BQ2B040H - 40A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | BQ2B040H-R |
| Series | BQ |
| Amperage | 40A |
| 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 (P1, P2, P3) |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| 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 |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Common Trip, High Interrupting Capacity |
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Description
Part of the BQ family, this 40-amp bolt-on molded case circuit breaker provides robust long-time and instantaneous trip functions for commercial and industrial environments. It installs securely into Siemens P1, P2, and P3 panelboards, ensuring stable power distribution. Featuring a high interrupting capacity of 22kA at 120/240VAC, the BQ2B040H offers enhanced fault protection compared to standard models. It also serves as a reliable substitute for QBHW2040 and THHQB2140 applications.Specifications
| Brand | Siemens |
|---|---|
| Part Number | BQ2B040H |
| Series | BQ |
| Amperage | 40A |
| 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 (P1, P2, P3) |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| 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 |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Common Trip, High Interrupting Capacity |
Product FAQs
7 answersWhich panelboards are compatible with the Siemens BQ2B040H?
This bolt-on circuit breaker is designed for installation in Siemens P1, P2, and P3 panelboards.
What does the H in the BQ2B040H catalog number indicate?
The H designates a high interrupting rating. The BQ2B040H is rated for 22kAIC at 120/240VAC, whereas the standard BQ2B040 is rated for 10kAIC.
What wire sizes and materials are accepted by the BQ2B040H lugs?
The factory-installed lugs accept 14-6 AWG copper (Cu) wire and 12-6 AWG aluminum (Al) wire.
Can the Siemens BQ2B040H replace older ITE BQ circuit breakers?
Yes. Siemens acquired ITE, and the current Siemens BQ series serves as the direct replacement for legacy ITE BQ bolt-on breakers with matching specifications.
Is the Siemens BQ2B040H HACR rated?
Yes, Siemens BQ series molded case circuit breakers are HACR rated, making them suitable for group motor applications in heating, air conditioning, and refrigeration equipment.
How does the BQ2B040H connect to the panelboard?
It features a bolt-on connection type that secures directly to the panelboard bus, ensuring a reliable mechanical and electrical connection for commercial and industrial applications.
How does the trip unit function on the BQ2B040H?
It utilizes a fixed thermal-magnetic trip mechanism. The thermal component provides long-time delay for overloads, while the magnetic component provides instantaneous tripping for short circuits.
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