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Siemens HQJ23B125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Siemens
HQJ23B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
HQJ23B125
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Siemens HQJ23B125 - 125A 3 Pole Molded Case Circuit Breaker
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125A 3 Pole Molded Case Circuit Breaker
125A 3 Pole Molded Case Circuit Breaker
Description
Built for commercial power systems, the Siemens HQJ23B125 is a 3-pole, 125A molded case circuit breaker from the Sentron family. It provides reliable thermal-magnetic overcurrent protection for three-phase networks. This QJ-frame unit mounts into Siemens P1, P2, and P3 panelboards, switchboards, and motor control centers. It is superseded by the HQR23B125 model for newer installations. Featuring a 65kAIC rating at 240VAC, this breaker is HACR rated and supports reverse feed applications.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HQJ23B125 |
| Series | HQJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC |
| Frame Type | HQJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Switchboards, Meter Centers, Motor Control Centers |
| Wire Gauge | 6 AWG-300 kcmil (Cu), 4 AWG-300 kcmil (Al) |
| Max Wire | 300 kcmil |
| Min Wire | 6 AWG (Cu), 4 AWG (Al) |
| 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 |
|---|---|
| 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, Common Trip, Extra High Interrupting Capacity |
Product FAQs
5 answersWhat types of enclosures and panels are compatible with the HQJ23B125?
This breaker mounts into Siemens P1, P2, and P3 panelboards. It is also approved for use in Siemens switchboards, meter centers, and motor control centers.
Can the HQJ23B125 be used in reverse feed applications?
Yes, this breaker supports reverse feeding, allowing it to be back-fed when required by your system design.
Is the HQJ23B125 HACR rated for HVAC equipment?
Yes, this breaker carries an HACR rating, making it suitable for protecting heating, air conditioning, and refrigeration circuits.
What is the difference between the standard QJ23B125 and the HQJ23B125?
The H designation in the HQJ23B125 catalog number indicates a high interrupting rating. It provides 65kAIC at 240V, whereas the standard QJ version has a lower short-circuit current rating.
Is there a newer direct replacement for the HQJ23B125?
Yes, the HQJ23B125 has been superseded by the HQR23B125 for newer installations. The QR-frame HQR23B125 serves as the modern equivalent, though the HQJ23B125 is still used to maintain existing QJ-frame configurations.
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