Square D HJA261252 Molded Case Circuit Breaker
- 125A
- 2 Pole
- I-Line
Square D
HJA261252
Molded Case Circuit Breaker
Brand
Square D
SKU
HJA261252
Quantity
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Square D HJA261252 - 125A 2 Pole Molded Case Circuit Breaker
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Description
Built for heavy-duty commercial and industrial applications, the Square D HJA261252 is a 125A molded case circuit breaker from the PowerPact H-Frame series. It delivers dependable long-time and instantaneous (LI) thermal-magnetic protection for critical power distribution systems. This breaker mounts into Square D I-Line panelboards and switchboards, utilizing a factory-configured AC phase connection. It also functions as a replacement for legacy KH26125 breakers.Specifications
| Brand | Square D |
|---|---|
| Series | HJA |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | HJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 14 AWG - 3/0 AWG |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Load Side Lugs Included, Phase Connection AC (Factory Configured) |
| 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, 80% Rated |
Product FAQs
8 answersWhat type of panelboards are compatible with the HJA261252?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It features a plug-on line side connection and mechanical lugs on the load side, which is standard for the I-Line mounting system.
How is the HJA261252 installed in an I-Line panel?
The breaker uses an I-Line bracket mounting system. The line side plugs directly into the panelboard bus assembly, while the load side uses mechanical lugs for wire connections.
What are the load side lug torque specifications for this breaker?
For the mechanical lugs accepting 14 to 3/0 AWG wire, the tightening torque is 44 lbf.in (5 N.m) for 14 to 10 AWG wire, and 124 lbf.in (14 N.m) for 8 to 3/0 AWG wire. Always verify exact torque values on the physical breaker label before terminating.
Can the PowerPacT H-Frame replace older legacy Square D breakers?
Yes, the PowerPacT H-Frame series is the modern replacement for legacy Square D F-Frame (FA and FH) circuit breakers. Because the H-Frame extends up to 150A, it provides a direct upgrade path for older I-Line panelboards.
What does the "J" in the HJA261252 catalog number signify?
In the PowerPacT nomenclature, the "J" designates the interrupting capacity tier. For this H-Frame breaker, the J-tier provides a 65kAIC rating at 480VAC and 25kAIC at 600VAC.
Does this breaker include a push-to-trip feature?
Yes, all PowerPacT circuit breakers include an integral push-to-trip button on the front cover. This allows you to manually trip the breaker to verify the mechanical operation of the tripping mechanism.
What are the magnetic hold and trip current values for this breaker?
The thermal-magnetic trip unit on this 125A breaker has a magnetic hold current of 900A and a magnetic tripping current of 1700A.
Is the HJA261252 rated for 80% or 100% continuous current?
This standard PowerPacT H-Frame circuit breaker is rated for 80% continuous current.
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