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Square D QJA32125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- I-Line
Square D
QJA32125
Molded Case Circuit Breaker
Brand
Square D
SKU
QJA32125
Quantity
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Square D QJA32125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D QJA32125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | QJA32125 |
| Series | QJA |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 208Y/120VAC, 100kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 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 | Phase Connection ABC (Factory Configured) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | ANCE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Mercury Free, PVC Free |
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Square D QJA32125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | QJA32125 |
| Series | QJA |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 208Y/120VAC, 100kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 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 | Phase Connection ABC (Factory Configured) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | ANCE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Mercury Free, PVC Free |
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Description
Built for heavy-duty electrical systems, the Square D QJA32125 is a 125A, 3-pole molded case circuit breaker. Part of the PowerPacT Q-Frame series, it utilizes thermal-magnetic technology for precise long-time and instantaneous (LI) trip functions. Designed with an I-Line plug-on mounting style, it integrates seamlessly into Square D I-Line panelboards. It also replaces the discontinued Q23125 model. This current-limiting breaker provides a robust 100kAIC rating at 240VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | QJA32125 |
| Series | QJA |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 208Y/120VAC, 100kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 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 | Phase Connection ABC (Factory Configured) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | ANCE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Mercury Free, PVC Free |
Product FAQs
8 answersCan I use the QJA32125 to replace older obsolete Square D breakers?
Yes, the PowerPacT QJA32125 is a direct replacement for the discontinued Square D Q23125 circuit breaker. It maintains the same physical footprint, I-Line mounting style, and 125A 3-pole configuration.
What does the letter J signify in the QJA32125 catalog number?
In the PowerPacT Q-Frame catalog structure, the J indicates the breaking capacity tier. A J-tier breaker provides a high interrupting rating of 100kA at 240V AC, compared to lower tiers like the D (25kA) or G (65kA).
What are the specific magnetic trip thresholds for this 125A Q-Frame breaker?
The fixed magnetic trip unit on the QJA32125 features a hold current rating of 1200A and a trip current rating of 2400A.
How does the I-Line connection on the QJA32125 wire into the panel?
The breaker features a plug-on line-side connection that presses directly onto the I-Line panelboard bus. A mounting bracket secures the unit to the panel interior, eliminating the need for line-side cabling. The load side utilizes standard mechanical lugs.
Is the QJA32125 suitable for reverse-feed applications?
No. Because this is an I-Line breaker equipped with plug-on jaw contacts on the line side and mechanical lugs on the load side, it cannot be reverse fed. Power must flow from the panel bus to the load terminals.
Can I install this breaker in a 480V or 600V system?
No, this PowerPacT Q-Frame molded case circuit breaker is rated for a maximum of 240V AC. Using it on 480V or 600V electrical systems violates its UL listing and safety specifications.
Which panelboards accept the QJA32125?
This breaker is compatible exclusively with Square D I-Line panelboards and switchboards. It will not mount in QO load centers or standard NQ and NF lighting panels.
What is the factory phase connection for this 3-pole breaker?
The QJA32125 comes factory-configured with an ABC phase connection to match standard 3-phase I-Line bus structures.
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