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Federal Pacific HFJ631150 Molded Case Circuit Breaker
- 150A
- 3 Pole
- Bolt-On
Federal Pacific
HFJ631150
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
HFJ631150
Quantity
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Federal Pacific HFJ631150 - 150A 3 Pole Molded Case Circuit Breaker
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Description
A drop-in replacement for older Federal Pacific panels, the HFJ631150 is a 3-pole, 150A molded case circuit breaker built for commercial applications. It delivers reliable long-time and instantaneous protection for aging electrical systems. This bolt-on MCCB installs into legacy FPE switchboards. It serves as an exact substitute for the discontinued NFJ631150, maintaining the original footprint. Rated for 65kAIC at 240VAC, this H-Frame breaker features fixed thermal-magnetic trip units.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HFJ631150-R |
| Series | HFJ |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 22kA @ 480VAC, 18kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Panelboards and Switchboards |
| Wire Gauge | 4 AWG - 350 kcmil |
| Max Wire | 350 kcmil |
| Min Wire | 4 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 |
|---|---|
| Accessories | Load Side Lugs |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Non-Interchangeable Trip |
Product FAQs
6 answersWhat obsolete Federal Pacific breaker does the HFJ631150 replace?
The HFJ631150 serves as a direct drop-in replacement for the discontinued NFJ631150. It maintains the exact same footprint, allowing you to service legacy Federal Pacific switchboards without requiring costly panel modifications.
Is the HFJ631150 compatible with modern electrical panels?
No. This H-Frame molded case circuit breaker is designed exclusively for legacy Federal Pacific panelboards and switchboards. It cannot be installed in modern enclosures from brands like Square D, Siemens, or Eaton.
What wire sizes are accepted by the load side lugs on the HFJ631150?
The included load side lugs accommodate conductors ranging from 4 AWG up to 350 kcmil. Always verify proper torque specifications when securing the wiring and bolting the breaker to the panel busbar.
How does the trip unit function on the Federal Pacific HFJ631150?
The breaker utilizes a fixed thermal-magnetic trip unit providing Long-Time and Instantaneous (LI) protection. Both the thermal overload and magnetic short-circuit trip points are factory set and cannot be adjusted in the field.
Can the HFJ631150 be used in 480V systems with high available fault current?
The breaker is rated for a maximum interrupting capacity of 22kA at 480V AC. If your 480V commercial or industrial system has an available fault current exceeding 22kA, this breaker will not provide adequate protection.
Are there specific safety considerations when replacing Federal Pacific H-Frame breakers?
When servicing legacy Federal Pacific equipment, always verify that the busbar connections are clean and free of pitting before bolting on the replacement breaker. Ensure the system is fully de-energized and follow all standard lockout and tagout procedures.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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1 review
- JMJimmy M.Verified BuyerReviewingFederal Pacific HFJ631225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/9/26FPE HFJ631225
Super Breakers always comes through for me. Had a customer who’s sub breaker feeding the office went out and Rick with Super Breakers was very helpful finding the exact replacement.
I recommend them to anyone.