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Siemens HQR22B150 Molded Case Circuit Breaker
- 150A
- 2 Pole
- Bolt-On
Siemens
HQR22B150
Molded Case Circuit Breaker
Brand
Siemens
SKU
HQR22B150
Quantity
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Siemens HQR22B150 - 150A 2 Pole Molded Case Circuit Breaker
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Description
A reliable choice for commercial facilities, the Siemens HQR22B150 is a 2-pole, 150A molded case circuit breaker. It utilizes fixed thermal-magnetic trip technology to protect critical distribution circuits from overloads. This bolt-on MCCB mounts into Siemens P1, P2, and P3 panelboards, as well as compatible switchboards. It functions as a seamless replacement for legacy QJ frame breakers. Rated for 65kAIC at 240VAC, this breaker features a push-to-trip button and is fully HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Series | HQR |
| Amperage | 150A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC |
| Frame Type | HQR |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Switchboards |
| Wire Gauge | 3 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 3 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 Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Push-to-Trip Button, Non-Interchangeable Trip, High Interrupting Capacity |
Product FAQs
6 answersCan the Siemens HQR22B150 replace an older QJ frame breaker?
Yes. The Siemens QR frame is the direct successor to the legacy QJ frame. The HQR22B150 shares the same form factor and mounting as legacy QJ frame breakers, making it a seamless retrofit for existing panelboards and switchboards.
What is the difference between the QR22B150 and the HQR22B150?
The difference is the interrupting rating. The standard QR22B150 is rated for 10kAIC at 240V, while the HQR22B150 is a high-interrupting breaker rated for 65kAIC at 240V.
Does the HQR22B150 require a mounting kit for Siemens P1 panelboards?
Yes. When installing this breaker as a main or subfeed in a Siemens Revised P1 panelboard, you will need a mounting kit. Use the MBKQR1 kit for single-phase systems or the MBKQR3 kit for three-phase systems.
What is the lug torque specification for the HQR22B150?
For the standard aluminum or copper lugs, torque the wire grip screws to 100 in-lb for 3 AWG to 1/0 AWG wire, and 225 in-lb for 2/0 AWG to 300 kcmil wire. Always verify the exact torque requirements on the breaker label before terminating.
Will the HQR22B150 fit in a standard residential load center?
No. The HQR22B150 is a bolt-on molded case circuit breaker designed for commercial and industrial distribution equipment, such as Siemens P1, P2, and P3 panelboards or switchboards. It is not compatible with residential plug-on load centers that use QP or QT breakers.
Can I adjust the trip settings on the HQR22B150?
No. The HQR22B150 features a fixed thermal and fixed magnetic trip unit. It does not offer adjustable long-time or instantaneous settings.
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