Federal Pacific HJL634400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Bolt-On
Quantity
Federal Pacific HJL634400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for heavy-duty commercial applications, the Federal Pacific HJL634400 is a 3-pole, 400A molded case circuit breaker. It delivers reliable protection for facilities relying on older infrastructure. Designed specifically for legacy systems, this H-Frame breaker mounts securely into Federal Pacific panelboards and switchboards. The bolt-on configuration ensures a stable connection without requiring hardware modifications. Featuring a 22kAIC rating at 600VAC, it includes load side lugs.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HJL634400-R |
| Series | HJL |
| Amperage | 400A |
| 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, Switchboards |
| Wire Gauge | 250-600 kcmil |
| Max Wire | 600 kcmil |
| Min Wire | 250 kcmil |
| 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity |
Product FAQs
6 answersWhat equipment is the Federal Pacific HJL634400 designed to fit?
This legacy H-Frame breaker is engineered for bolt-on installation in older Federal Pacific distribution panels and switchboards. It allows you to maintain existing infrastructure without requiring modern adapters.
What are the wire gauge requirements for the HJL634400 lugs?
The factory lugs accommodate conductors ranging from 250 to 600 kcmil. When installing, verify that your wire size and insulation temperature rating meet NEC requirements for a 400A load.
How does the trip unit function on the HJL634400?
The breaker features a thermal-magnetic (LI) trip unit. The thermal element provides fixed long-time protection against overloads, while the magnetic element is adjustable to fine-tune the instantaneous short-circuit response.
How does the HJL634400 mount into the panel?
As a bolt-on MCCB, it mounts directly to the busbars of compatible Federal Pacific switchboards. It requires the correct busbar hardware for a secure, torqued connection and does not use a plug-on mechanism.
What are the fault current limits for the HJL634400?
This breaker has a maximum interrupting rating of 22kAIC at both 480VAC and 600VAC. Always perform a short-circuit study to ensure the available fault current at the panel does not exceed 22,000 amps.
Can the HJL634400 replace other breakers in the H-Frame family?
Yes. As part of the Federal Pacific H Frames group, the HJL634400 shares the same physical footprint as other HJL breakers. It serves as a direct replacement in existing panels, provided the 400A rating and 22kAIC specifications meet your system requirements.
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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.