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Federal Pacific HFJ434125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Federal Pacific
HFJ434125
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
HFJ434125
Quantity
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Federal Pacific HFJ434125 - 125A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial and industrial applications, the Federal Pacific HFJ434125 is a 3-pole, 125A molded case circuit breaker. It provides reliable thermal-magnetic overcurrent protection for three-phase systems. This bolt-on MCCB installs into legacy Federal Pacific panelboards and switchboards. It serves as an exact drop-in replacement for the obsolete NFJ434125, eliminating the need for aftermarket adapters or panel modifications.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HFJ434125-R |
| Series | HFJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 22kA @ 480VAC |
| Frame Type | HFJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific Panels and Switchgear |
| 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, Undervoltage Release, Auxiliary Switch |
|---|---|
| Accessories | Load Side Lugs |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
6 answersWhich enclosures are compatible with the HFJ434125 circuit breaker?
This legacy H-Frame molded case circuit breaker is specifically designed for use in existing Federal Pacific panels and switchgear.
How is the HFJ434125 installed into Federal Pacific enclosures?
This breaker requires a bolt-on connection to securely mount to the busbar in compatible legacy Federal Pacific panels and switchgear.
What wire sizes are accepted by the load side lugs on the HFJ434125?
The factory-installed load side lugs accept wire gauges ranging from 4 AWG up to 350 kcmil.
How does the interrupting rating of the HFJ434125 change based on system voltage?
The breaker provides a maximum interrupting capacity of 65kA at 240VAC, which decreases to 22kA when applied to 480VAC systems.
Are the trip settings adjustable on the HFJ434125?
No, this breaker is equipped with a thermal-magnetic trip unit that features fixed thermal and fixed magnetic settings for long-time and instantaneous (LI) protection.
Is the HFJ434125-R a different breaker than the standard HFJ434125?
No, HFJ434125-R is simply an alternate catalog number for the exact same 125A, 3-pole HFJ frame breaker and serves as a direct replacement.
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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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Rating
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.