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Siemens QRH22B125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Siemens
QRH22B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
QRH22B125
Quantity
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Siemens QRH22B125 - 125A 2 Pole Molded Case Circuit Breaker
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Description
Part of the Sentron family, this 125A two-pole breaker provides robust thermal-magnetic protection for commercial and industrial electrical systems. It mounts securely into Siemens P2, P3, P4, and P5 panelboards, as well as SB switchboards. Rated at 25kA interrupting capacity at 240VAC, it features a push-to-trip mechanism and serves as an exact replacement for legacy QJ22B125 and QJH22B125 models.Specifications
| Brand | Siemens |
|---|---|
| Series | QRH |
| Amperage | 125A |
| 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 | 1 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 1 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, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Trip-Free Mechanism, High Interrupting Capacity |
Product FAQs
8 answersWhat legacy Siemens circuit breakers does the QRH22B125 replace?
The QRH22B125 is a direct replacement for legacy Siemens QJ22B125 and QJH22B125 molded case circuit breakers. It shares the same form factor and mounting footprint for easy retrofitting.
Which Siemens panelboards are compatible with the QRH22B125 circuit breaker?
This QR frame breaker is designed for use in Siemens P2, P3, P4, and P5 panelboards, as well as SB series switchboards.
Does this breaker require a mounting strap kit for panelboard installation?
Yes, installing the QRH22B125 in a panelboard typically requires a mounting strap kit, such as the BBKQR1 for single breaker mounting, depending on your specific panelboard configuration.
What are the lug torque specifications for the QRH22B125?
For the standard lugs, torque requirements depend on the wire size. Torque 1 AWG and 1/0 AWG conductors to 100 in-lb. Torque 2/0 AWG through 300 kcmil conductors to 225 in-lb.
Are internal accessories like shunt trips field-installable on this breaker?
Yes, Siemens QR frame circuit breakers support field-installable internal accessories, including shunt trips and auxiliary switches. Two-pole models feature one accessory pocket.
Is the QRH22B125 rated for reverse feed applications?
Yes, Siemens QR frame molded case circuit breakers feature a cable-in, cable-out design and are suitable for reverse feed applications.
What is the ambient temperature calibration for this circuit breaker?
Standard Siemens QR frame breakers are calibrated for 40 degrees Celsius ambient temperatures. Operating the breaker in higher temperature environments will require derating.
Can a padlock device be installed on the QRH22B125 for lockout procedures?
Yes, you can install a compatible padlocking device, such as the Siemens HPLQR, to secure the breaker handle in the OFF position for safety compliance during maintenance.
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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.