Federal Pacific HEF425050 Molded Case Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific HEF425050 - 50A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for demanding environments, this 50A double-pole MCCB supplies dependable overcurrent protection. The HEF series utilizes proven thermal-magnetic technology for accurate tripping. Designed specifically for legacy infrastructure, it replaces the older NEF425050 model. The breaker installs into existing FPE panelboards, allowing facilities to maintain current enclosures. Featuring a 42kA interrupting capacity at 240VAC, it mitigates high-level short circuits.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HEF425050 |
| Series | HEF |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 1 |
| AIC Rating | 42kA @ 240VAC, 22kA @ 480VAC |
| Frame Type | HEF |
|---|---|
| Terminal Type | Lugs |
| For Use With | FPE Panelboards and Switchboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity |
Product FAQs
6 answersWhat equipment is the HEF425050 designed to fit?
This breaker is engineered specifically for legacy Federal Pacific (FPE) panelboards and switchboards configured to accept H-frame molded case circuit breakers.
What are the wire gauge and material requirements for the HEF425050 lugs?
The included terminal lugs accommodate conductor sizes from 14 AWG up to 1/0 AWG. They are dual-rated for use with either copper or aluminum wiring.
How does the interrupting capacity scale between 240V and 480V applications?
The short-circuit interrupting rating depends on the system voltage. It provides up to 42kAIC on 240VAC systems, but drops to a maximum of 22kAIC when applied to 480VAC systems.
Can the trip curve be adjusted on the HEF425050?
No, this model utilizes a fixed thermal-magnetic trip unit. Both the long-time overload and instantaneous short-circuit (LI) trip functions are factory calibrated and non-adjustable.
Does this breaker plug into the busbar or require hardware?
The HEF425050 is a bolt-on circuit breaker. It must be mechanically bolted directly to the panelboard bus, which provides a secure connection for commercial and industrial applications.
Is the HEF425050 part of the Federal Pacific Stab-Lok residential line?
No. The HEF series is a commercial and industrial molded case circuit breaker (MCCB) with a bolt-on connection. It is completely distinct from the residential Stab-Lok plug-on breakers.
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