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Siemens HQR22B125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Siemens
HQR22B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
HQR22B125
Quantity
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Siemens HQR22B125 - 125A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial power systems, the Siemens HQR22B125 is a 2-pole, 125A molded case circuit breaker. It utilizes fixed thermal and magnetic trip units to provide consistent protection for critical circuits. The bolt-on design installs seamlessly into Siemens P1, P2, and P3 panelboards, switchboards, and meter centers. It also serves as a replacement for older QJ frame breakers. Rated for 65kAIC at 240VAC, this unit includes a push-to-trip testing button and supports reverse feed.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HQR22B125 |
| Series | HQR |
| Amperage | 125A |
| 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, Meter Centers |
| Wire Gauge | 3 AWG - 300 kcmil (Cu), 6 AWG - 350 kcmil (Al) |
| Max Wire | 350 kcmil |
| Min Wire | 3 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, NOM, UL |
| Temp Rating | 40C |
| Construction Features | Reverse Feed, Push-to-Trip, Non-Interchangeable Trip, High Interrupting Capacity |
Product FAQs
7 answersIs the HQR22B125 a direct replacement for older QJ frame breakers?
Yes, the Siemens QR frame was introduced as the successor to the legacy QJ frame. It maintains the same form and fit, allowing it to replace older QJ breakers in existing panels.
How does the HQR22B125 differ from a standard QR22B125?
The HQR22B125 features a high interrupting rating of 65kAIC at 240VAC. A standard QR22B125 has a lower interrupting rating of 10kAIC.
What are the wire gauge requirements for the HQR22B125 lugs?
The standard lugs accommodate 3 AWG through 300 kcmil for copper conductors, and 6 AWG through 350 kcmil for aluminum conductors.
Does this breaker plug in or bolt onto the bus?
The HQR22B125 features a bolt-on connection type, meaning it must be securely bolted to the panelboard bus rather than snapped into place.
Can internal accessories be added to the HQR22B125 in the field?
Yes, the Siemens QR frame supports field-installable internal accessories, such as shunt trips and auxiliary switches, without needing to order a custom factory build.
Does the QR frame include a mechanical test feature?
Yes, this breaker includes a push-to-trip button on the faceplate, allowing users to manually test the mechanical tripping mechanism.
Which Siemens enclosures are compatible with this breaker?
It is designed to bolt into Siemens P1, P2, and P3 panelboards. It is also compatible with Siemens switchboards and meter centers configured for QR frame breakers.
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