Federal Pacific HJL634125 Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Quantity
Federal Pacific HJL634125 3 Pole Circuit Breaker
Re-Certified
Quantity
Description
Federal Pacific HJL634125 3 Pole Circuit Breaker
The Federal Pacific HJL634125 is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 125 Amps and a voltage rating of 600VAC. It has an interrupting rating of 22kAIC at 600V. The HJL634125 has a bolt-on connection type and includes long time and instantaneous trip functions.
Specifications
| Brand | Federal Pacific |
|---|---|
| Series | HJL |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 480VAC, 22kA @ 600VAC |
| Frame Type | HJL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific Panels and Switchboards |
| Trip Technology | Thermal Magnetic |
|---|
Product FAQs
7 answersWhat panelboards accept the Federal Pacific HJL634125 circuit breaker?
The HJL634125 is designed for legacy Federal Pacific Electric (FPE), American, and Challenger industrial panelboards and switchboards configured for HJL-frame bolt-on breakers.
How is the HJL634125 secured within the panelboard?
This breaker utilizes a bolt-on connection, meaning the line-side terminals must be bolted directly to the panel busbars. Proper torque must be applied to ensure a secure electrical connection and prevent overheating.
How does the thermal-magnetic trip unit function on the HJL634125?
The thermal-magnetic trip unit provides dual protection. The thermal component offers long-time delay to protect against sustained overloads, while the magnetic component provides instantaneous tripping to clear severe short circuits.
Is the Federal Pacific HJL634125 still in active production?
Federal Pacific Electric is no longer manufacturing new equipment. Original HJL-frame breakers are obsolete and are sourced to maintain and service legacy FPE, American, or Challenger power distribution systems without requiring a full panel upgrade.
Is the HJL634125 suitable for use on 480V systems?
Yes. Because it carries a maximum voltage rating of 600VAC, it can be safely installed in 480V, 240V, and 208V three-phase AC systems.
What does the 22kAIC rating at 600V mean for system design?
The 22kAIC rating indicates the maximum fault current the breaker can safely interrupt at 600VAC. When installing this breaker, the available short-circuit current at the panel must not exceed 22,000 amps to ensure safe operation.
Can the HJL634125 replace other HJL-frame breakers with different amperages?
Yes, the HJL634125 shares the same physical dimensions as other HJL-frame breakers. It can be installed in the same mounting space, provided the panel, busbars, and conductors are properly rated for a 125A load.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- KLKari L.Verified BuyerReviewingSquare D HJL36040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/9/26Great Customer Service
Working with Superbreakers the team is so helpful. They answer the phone and are very accommodating. We had an issue with the refurbished breaker not working out and they helped get a new one out right away.