Siemens HQR22B125HL Molded Case Circuit Breaker
- 125A
- 2 Pole
- Unit Mount
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Siemens HQR22B125HL - 125A 2 Pole Molded Case Circuit Breaker
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Description
Built for industrial applications, the Siemens HQR22B125HL is a 2-pole, 125A molded case circuit breaker from the SENTRON QR series. It delivers robust thermal-magnetic protection for heavy-duty electrical networks. Designed with a unit-mount configuration, this breaker installs into Siemens enclosures, switchboards, and meter centers. It includes line and load lugs for secure wiring and replaces older HQJ22B125HL models.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HQR22B125HL |
| Series | HQR |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Enclosures, Switchboards, Meter Centers |
| 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 | Line and Load Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Common Trip, Trip-Free Mechanism, Extra High Interrupting Capacity |
Product FAQs
7 answersCan the Siemens HQR22B125HL replace older QJ frame circuit breakers?
Yes. The Siemens QR frame is the direct successor to the legacy QJ frame. It shares the exact form factor and mounting dimensions, making the HQR22B125HL a direct drop-in replacement for the obsolete HQJ22B125HL.
What equipment is the HQR22B125HL designed to be installed in?
This unit-mount breaker is engineered for use in Siemens enclosures, switchboards, and meter centers. You must verify your specific equipment label to confirm QR frame compatibility before installation.
What are the conductor requirements for the HQR22B125HL lugs?
The factory-installed lugs accept either aluminum or copper wire ranging from 3 AWG to 300 kcmil. Ensure conductors are properly torqued according to the manufacturer specifications printed on the breaker.
What does the 100kAIC rating on the HQR22B125HL indicate for my application?
The 100kA at 240VAC interrupting capacity means this breaker can safely clear severe fault currents up to 100,000 amps. This extra-high rating is typically required in heavy commercial or industrial networks with high available fault currents.
Is the HQR22B125HL a plug-on or bolt-on breaker?
This is a unit-mount, bolt-on circuit breaker. It requires bolted connections to the buswork or mounting pan, providing a secure, vibration-resistant connection for industrial environments.
Can I install this Siemens QR frame breaker in a non-Siemens panelboard?
No. Siemens circuit breakers are UL-listed exclusively for use in compatible Siemens equipment. Installing this breaker in a GE, Square D, or Eaton panel voids the safety certification and creates a severe fire hazard.
Are the thermal and magnetic trip settings adjustable on the HQR22B125HL?
No. This breaker utilizes a standard thermal-magnetic trip unit with fixed long-time (overload) and fixed instantaneous (short-circuit) functions. If your application requires adjustable trip curves, you will need a breaker with an electronic trip unit.
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