Square D HJA36125AA Molded Case Circuit Breaker
- 125A
- 3 Pole
- I-Line
Square D
HJA36125AA
Molded Case Circuit Breaker
Brand
Square D
SKU
HJA36125AA
Quantity
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Square D HJA36125AA - 125A 3 Pole Molded Case Circuit Breaker
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Description
Providing enhanced system integration, the HJA36125AA is a 125A, 3-pole PowerPacT H-Frame circuit breaker featuring a factory-installed auxiliary switch. This allows for remote status indication alongside its standard thermal-magnetic protection. Designed for Square D I-Line panelboards, it features a plug-on mounting style. It seamlessly replaces legacy FC36125, FA36125, and FH36125 breakers that require auxiliary contacts. This 80% rated breaker delivers a 65kAIC capacity at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | HJA36125AA |
| Series | HJA |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | H |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, 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, Undervoltage Release, Alarm Switch, Padlock Attachment, Rotary Handle, Motor Operator |
|---|---|
| Accessories | Auxiliary Switch (Factory Installed), 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, 80% Rated |
Product FAQs
7 answersCan the HJA36125AA replace older Square D circuit breakers?
Yes, the PowerPacT H-frame is the modern upgrade for legacy Square D F-frame breakers. The HJA36125AA can directly replace 125A FA, FH, and FC series I-Line breakers, such as the FA36125, FH36125, and FC36125, while adding a factory-installed auxiliary switch.
What is the difference between the HJA36125 and the HJA36125AA?
Both are 125A, 3-pole, I-Line circuit breakers with identical thermal-magnetic trip units and interrupting ratings. The only difference is that the HJA36125AA includes a factory-installed 1A/1B auxiliary switch for remote status signaling.
What does the "AA" suffix indicate on the HJA36125AA?
The "AA" suffix signifies that this breaker includes a factory-installed 1A/1B auxiliary switch (one normally open and one normally closed contact). This provides remote status indication of the breaker's open or closed position for use in automated monitoring or signaling circuits.
What does the "J" in the HJA36125AA catalog number represent?
In the Square D PowerPacT nomenclature, the "J" designates the interrupting rating tier. For this 600V-rated breaker, the J-tier provides a high interrupting capacity of 100kA at 240VAC, 65kA at 480VAC, and 25kA at 600VAC.
How does the HJA36125AA mount into a panelboard?
It utilizes an I-Line style plug-in connection. The line side of the breaker features jaws that push directly onto the panelboard bus stack, allowing for rapid installation and phase balancing without the need for line-side wire terminations.
What panelboards are compatible with the HJA36125AA?
This breaker is specifically designed for use in Square D I-Line panelboards and switchboards. It cannot be used in standard load centers or NQ/NF series panelboards.
Are the trip settings on the HJA36125AA adjustable?
No, this breaker features a traditional thermal-magnetic trip unit with fixed long-time (overload) and fixed instantaneous (short-circuit) trip functions. If adjustable trip settings are required, a breaker with a Micrologic electronic trip unit must be used instead.
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