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Federal Pacific HFJ434090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Federal Pacific
HFJ434090
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
HFJ434090
Quantity
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Federal Pacific HFJ434090 - 90A 3 Pole Molded Case Circuit Breaker
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Description
Built for industrial applications, the HFJ434090 thermal magnetic breaker ensures continuous safety in legacy electrical infrastructure. This 90-amp, three-pole MCCB features a rugged bolt-on design that fits seamlessly into Federal Pacific panelboards and switchgear. Serving as a direct substitute for the NFJ434090, it eliminates the need for complex retrofits. The breaker provides an interrupting capacity of 65kA at 240V and comes standard with load side lugs for straightforward wiring.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HFJ434090-R |
| Series | HFJ |
| Amperage | 90A |
| 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, 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
7 answersIs the Federal Pacific HFJ434090 still in active production?
No. Federal Pacific Electric (FPE) is no longer in business, making the HFJ434090 a legacy component. Replacements are typically sourced to maintain existing FPE switchgear and panelboards without requiring a complete system retrofit.
Can the HFJ434090 replace an older NFJ434090 breaker?
Yes. The HFJ434090 serves as a direct drop-in replacement for the discontinued NFJ434090. It fits into the same Federal Pacific panelboards and switchgear, eliminating the need for complex retrofits.
What equipment is compatible with the HFJ434090 circuit breaker?
This bolt-on molded case circuit breaker is designed specifically for installation in legacy Federal Pacific panelboards and switchgear configured for H-frame breakers.
What wire sizes are accepted by the standard lugs on the HFJ434090?
The load side lugs on this breaker accommodate wire gauges ranging from 4 AWG up to 350 kcmil. When terminating, ensure your conductor sizing aligns with NEC ampacity requirements for a 90-amp circuit.
Does the HFJ434090 share the safety concerns associated with FPE Stab-Lok breakers?
No. The HFJ434090 is a commercial-grade, bolt-on molded case circuit breaker designed for industrial applications. It is not part of the residential Stab-Lok line, which has documented safety controversies.
What does the H in the HFJ frame designation indicate?
In Federal Pacific nomenclature, the HFJ frame indicates a high interrupting capacity version of the standard FJ or NFJ frame. The HFJ434090 provides an interrupting rating of 65kA at 240VAC and 22kA at 480VAC.
How does the thermal-magnetic trip unit on the HFJ434090 operate?
This breaker features fixed long-time and instantaneous (LI) trip functions. The thermal element provides delayed overload protection, while the magnetic element responds immediately to short-circuit faults.
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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.