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Siemens QRH22B175 Molded Case Circuit Breaker
- 175A
- 2 Pole
- Bolt-On
Siemens
QRH22B175
Molded Case Circuit Breaker
Brand
Siemens
SKU
QRH22B175
Quantity
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Siemens QRH22B175 - 175A 2 Pole Molded Case Circuit Breaker
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Description
Built for commercial power distribution, this 175A MCCB offers robust thermal-magnetic protection. The 2-pole breaker is part of the proven Siemens SENTRON QR frame series. It features a bolt-on mounting style designed specifically for Siemens P2, P3, P4, and P5 panelboards, as well as SB switchboards. This model is the official replacement for legacy QJ22B175 and QJH22B175 breakers. Delivering a 25kAIC rating at 240VAC, it includes load side lugs and is fully HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Series | QRH |
| Amperage | 175A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P2, P3, P4, P5 Panelboards, SB 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, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Push-to-Trip, Non-Interchangeable Trip, High Interrupting Capacity |
Product FAQs
8 answersWhat legacy Siemens circuit breakers does the QRH22B175 replace?
The QRH22B175 is the official direct replacement for obsolete Siemens QJ22B175 and QJH22B175 molded case circuit breakers.
Which Siemens panelboards are compatible with the QRH22B175 breaker?
This bolt-on breaker is designed for use in Siemens P2, P3, P4, and P5 panelboards, as well as SB series switchboards.
Do I need a specific mounting kit to install this breaker in a Siemens P-series panelboard?
Yes, mounting kits are required and vary by panel type. For example, P2 panels typically use the BBKQ1 strap kit, while P3 panels use the BBKQ2 twin-mount kit. Check your specific panelboard labeling to confirm the exact hardware required.
What wire sizes are accepted by the lugs on the QRH22B175?
The included load-side lugs accept aluminum or copper wire ranging from 3 AWG up to 300 kcmil.
Are the trip settings on the QRH22B175 adjustable?
No, this breaker features a fixed thermal magnetic trip unit with non-interchangeable long-time and instantaneous trip functions.
Is the Siemens QRH22B175 HACR rated?
Yes, this breaker is fully HACR rated, making it suitable for protecting heating, air conditioning, and refrigeration equipment circuits.
What enclosure types are suitable for this breaker?
When properly installed in a compatible panelboard or switchboard, it is suitable for use in NEMA 1 indoor and NEMA 3R outdoor enclosures.
What temperature rating of wire should be used with this 175A breaker?
For circuit breakers rated over 125 amps like the QRH22B175, you must use wire rated for 75 degrees Celsius unless otherwise specified on the breaker label, in accordance with NEC guidelines.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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1 review
- CMChani M.Verified BuyerReviewingSiemens QRH23B150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/25Worked just as we needed it to.
Great buy.