Federal Pacific HFJ424175 Molded Case Circuit Breaker
- 175A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific HFJ424175 - 175A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for industrial applications, the HFJ424175 is a 175A, 2-pole molded case circuit breaker by Federal Pacific. It utilizes fixed thermal-magnetic trips to protect electrical systems. This bolt-on MCCB installs into existing Federal Pacific panels and switchgear. It acts as a direct replacement for the discontinued NFJ424175, requiring no enclosure modifications. With an interrupting rating of 65kA at 240V, it handles severe faults. The unit features a non-interchangeable trip design.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HFJ424175 |
| Series | HFJ |
| Amperage | 175A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 1 |
| 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 Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Non-Interchangeable Trip |
Product FAQs
7 answersWhat equipment is the Federal Pacific HFJ424175 designed to fit?
This 2-pole breaker is engineered specifically for legacy Federal Pacific panels and switchgear that accommodate HFJ-frame bolt-on circuit breakers.
What conductor sizes are supported by the terminals on the HFJ424175?
The included lugs accept wire gauges from 4 AWG up to 350 kcmil. Ensure you use the correct torque specifications when terminating the conductors.
How is the HFJ424175 installed into the panel?
It utilizes a bolt-on connection type, meaning it must be mechanically bolted directly to the panel busbars. This requires the panel to be fully de-energized before installation.
How does the trip unit on the HFJ424175 operate?
It uses a thermal-magnetic mechanism with fixed long-time and instantaneous (LI) trip functions. The thermal element protects against sustained overloads, while the magnetic element responds immediately to short circuits.
What is the maximum fault current this breaker can safely interrupt?
The HFJ424175 has a maximum interrupting rating of 65kA at 240VAC and 22kA at 480VAC. Verify that the available fault current at your installation point does not exceed these values.
Are new Federal Pacific HFJ424175 breakers still being produced?
Federal Pacific Electric is no longer in operation, making these breakers legacy components. They are primarily used to maintain or repair existing Federal Pacific electrical systems.
Does this breaker require any special safety considerations due to its legacy status?
Because Federal Pacific equipment is obsolete, it is critical to have a qualified electrician inspect the panel busbars and breaker contacts during installation to ensure safe and reliable operation.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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.