Siemens QPJ3125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Plug-On
Siemens
QPJ3125
Molded Case Circuit Breaker
Brand
Siemens
SKU
QPJ3125
Quantity
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Siemens QPJ3125 - 125A 3 Pole Molded Case Circuit Breaker
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Siemens QPJ3125 - 125A 3 Pole Molded Case Circuit Breaker
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Quantity
| Brand | Siemens |
|---|---|
| Part Number | QPJ3125 |
| Series | QPJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens EQIII Load Centers |
| Wire Gauge | 2 AWG - 300 kcmil (Cu/Al) |
| Max Wire | 300 kcmil |
| Min Wire | 2 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, Requires 6 Spaces |
Sold out
Quantity
Siemens QPJ3125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | QPJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens EQIII Load Centers |
| Wire Gauge | 2 AWG - 300 kcmil (Cu/Al) |
| Max Wire | 300 kcmil |
| Min Wire | 2 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, Requires 6 Spaces |
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125A 3 Pole Molded Case Circuit Breaker
125A 3 Pole Molded Case Circuit Breaker
125A 3 Pole Molded Case Circuit Breaker
Description
Designed for three-phase applications, this 125A molded case circuit breaker functions as a reliable main breaker. It utilizes thermal-magnetic trip technology to protect commercial and residential systems with a 10kAIC rating at 240VAC. This plug-on unit is engineered exclusively for Siemens EQIII load centers. The footprint requires six one-inch panel spaces, mounting across three positions on each side of the busbar. Load side lugs are included to streamline wiring.Specifications
| Brand | Siemens |
|---|---|
| Series | QPJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens EQIII Load Centers |
| Wire Gauge | 2 AWG - 300 kcmil (Cu/Al) |
| Max Wire | 300 kcmil |
| Min Wire | 2 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, Requires 6 Spaces |
Product FAQs
6 answersWhich load centers are compatible with the Siemens QPJ3125 breaker?
This unit is engineered exclusively for Siemens EQIII 3-phase load centers. It will not fit standard residential panels or enclosures from other manufacturers.
Is this breaker suitable for single-phase applications?
No, the QPJ3125 is a 3-pole breaker engineered specifically for three-phase Siemens EQIII load centers. It cannot be installed in single-phase panels.
How much panel space does the QPJ3125 require for installation?
Due to its crossover design, this breaker requires six 1-inch panel spaces. It mounts across three positions on each side of the busbar in an EQIII load center.
Can the QPJ3125 be used as a main breaker?
Yes, this breaker is commonly used as a main breaker in Siemens EQIII 3-phase load centers, though it can also serve as a branch breaker depending on your specific panel configuration.
Does this breaker bolt onto the busbar or plug in?
The QPJ3125 is a plug-on circuit breaker. While it belongs to the QJ and QR frame group, which includes bolt-on variants, the QPJ series utilizes a specialized plug-in mounting style specifically for EQIII panels.
Can standard QJ or QR breakers be used as direct replacements for the QPJ3125?
No. Even though they share the same frame group, standard QJ or QR breakers typically feature bolt-on connections. The QPJ3125 has a unique plug-on crossover architecture required for EQIII load centers.
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