Federal Pacific HEF425100 Molded Case Circuit Breaker
- 100A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific HEF425100 - 100A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Serving as a reliable component for commercial and industrial electrical systems, this 100A two-pole breaker features thermal-magnetic trip technology. It belongs to the legacy H-Frame family of molded case circuit breakers. The unit installs into classic FPE panelboards without requiring aftermarket adapters. It serves as an exact drop-in replacement for the discontinued NEF425100 and crosses over with the UBIF2100 substitute. With a robust 42kAIC rating at 240VAC, it handles heavy faults.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HEF425100-R |
| Series | HEF |
| Amperage | 100A |
| 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 |
| Wire Gauge | 4 AWG - 1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| 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 | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity |
Product FAQs
6 answersWhat panelboards are compatible with the HEF425100 circuit breaker?
This breaker is designed for use in legacy Federal Pacific Electric (FPE) panelboards that accept H-frame, bolt-on circuit breakers. Verify your enclosure accepts 2-pole HEF frames before installation.
Can the HEF425100 be used on a 240V electrical system?
Yes, it is suitable for 240V applications. When installed in a 240V system, the breaker provides an increased interrupting rating of 42kA compared to its 22kA rating at 480V.
What wire sizes do the load side lugs on the HEF425100 accept?
The factory-installed load side lugs accept 4 AWG to 1/0 AWG copper or aluminum conductors. Electricians must apply the correct torque during installation to ensure a secure connection and prevent thermal faults.
Does the HEF425100 feature adjustable trip settings?
No, this breaker utilizes a fixed thermal and fixed magnetic trip unit. It provides standard long-time and instantaneous protection functions without adjustable dials.
Are legacy FPE breakers like the HEF425100 safe to install?
These are authentic replacement breakers for existing systems. Because Federal Pacific is a legacy brand, licensed electricians should thoroughly inspect the existing panelboard bussing for signs of wear, pitting, or thermal damage before installing a replacement breaker.
Is the HEF425100 a direct replacement for older FPE HEF breakers?
Yes, it serves as a direct replacement for older 100A, 2-pole HEF frame breakers in existing Federal Pacific enclosures, maintaining the same bolt-on mounting and physical dimensions.
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