Square D HJA32125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- I-Line
Square D
HJA32125
Molded Case Circuit Breaker
Brand
Square D
SKU
HJA32125
Quantity
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Square D HJA32125 - 125A 3 Pole Molded Case Circuit Breaker
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Description
Built for robust electrical systems, this 125A, 3-pole MCCB belongs to the Square D PowerPacT H-Frame series. It utilizes thermal magnetic trip technology to deliver long-time and instantaneous (LI) protection across commercial and industrial environments. The unit installs into Square D I-Line panelboards and switchboards. It is an exact substitute for the discontinued Q232125 breaker. Rated for 100kAIC at 240VAC, it includes an ABC phase connection and load side lugs for secure wiring.Specifications
| Brand | Square D |
|---|---|
| Part Number | HJA32125 |
| Series | HJA |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC |
| Frame Type | HJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | 14 AWG - 3/0 AWG (Al/Cu) |
| Max Wire | 3/0 AWG |
| Min Wire | 14 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, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
7 answersWhich panelboards are compatible with the HJA32125 circuit breaker?
This breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It features a plug-in jaw connection on the line side that mounts directly to the I-Line bus.
How much mounting space does the HJA32125 require in an I-Line panel?
This H-frame breaker requires 4.5 inches of bus mounting space. It occupies the same footprint as legacy Square D F-frame breakers, allowing it to serve as a direct plug-on replacement for older FA and FH series I-Line breakers.
What does the J in the HJA32125 catalog number indicate?
The J designates the interrupting rating tier within the Square D PowerPacT H-frame family. It provides a higher short-circuit interrupting capacity than the D-tier (HDA32125) or G-tier (HGA32125) models.
What type of lugs are included on the load side of the HJA32125?
This I-Line breaker comes standard with AL150HD mechanical lugs on the load side (the OFF end). These lugs accept 14 AWG to 3/0 AWG aluminum or copper wire.
Can the HJA32125 be reverse fed?
No. Because it is an I-Line style breaker with plug-in jaws on the line side and mechanical lugs on the load side, it is strictly designed for forward feeding and cannot be reverse fed.
What is the phase connection sequence for this 3-pole breaker?
The HJA32125 features a standard ABC phase sequence connection. Its jaws seat directly onto the A, B, and C phases of the I-Line panelboard bus.
Does this breaker have an adjustable trip unit?
No, the HJA32125 features a thermal-magnetic trip unit with fixed long-time and fixed instantaneous trip functions. It does not offer adjustable trip settings.
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