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Federal Pacific HFJ434100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Federal Pacific
HFJ434100
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
HFJ434100
Quantity
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Federal Pacific HFJ434100 - 100A 3 Pole Molded Case Circuit Breaker
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Description
The HFJ434100 is a 100A, three-pole molded case circuit breaker from Federal Pacific's legacy H-Frame series. It delivers reliable thermal-magnetic protection for commercial three-phase systems. This bolt-on MCCB installs into existing Federal Pacific panels. It serves as an exact drop-in replacement for the discontinued NFJ434100, allowing facilities to maintain aging infrastructure without costly panel upgrades. Rated 65kAIC at 240V and 22kAIC at 480V, it features fixed LI trip functions.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HFJ434100-R |
| Series | HFJ |
| Amperage | 100A |
| 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 answersCan the HFJ434100 replace older Federal Pacific NFJ series breakers?
Yes, the HFJ434100 serves as an exact drop-in replacement for the discontinued NFJ434100 circuit breaker. This allows you to maintain existing Federal Pacific panels without requiring a complete panel upgrade.
What type of panels accept the HFJ434100 circuit breaker?
This bolt-on molded case circuit breaker is designed specifically for installation in legacy Federal Pacific panels and switchgear, including CDP series distribution panels.
What mounting hardware is required to install HFJ frame breakers in a CDP panel?
Installing an HFJ frame breaker into a Federal Pacific CDP panel typically requires an NFJ1K mounting hardware kit.
Can the HFJ434100 be used on 240V systems?
Yes. While it has a maximum voltage rating of 480VAC with a 22kA interrupting capacity, it is also fully rated for 240VAC systems, where it provides a higher interrupting capacity of 65kA.
Does the HFJ434100 provide adjustable trip settings?
No, this breaker features a thermal-magnetic trip unit with fixed long-time and fixed instantaneous trip functions. It does not offer adjustable trip dials.
What wire sizes are compatible with the load side lugs on this breaker?
The factory-installed load side lugs on the HFJ434100 accommodate conductors ranging from 4 AWG up to 350 kcmil.
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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.