Federal Pacific HEG421100 Molded Case Circuit Breaker
- 100A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific HEG421100 - 100A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed to support legacy electrical systems, this 100-amp molded case circuit breaker provides robust overcurrent protection for commercial facilities. It features a specialized two-pole design housed inside a three-pole frame. This bolt-on component mounts into older Federal Pacific panelboards. It is an exact replacement for the NEF421100 and NEG421100, allowing facility managers to maintain existing infrastructure. The unit offers a 22 kAIC rating at 480VAC with fixed trip settings.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HEG421100-R |
| Series | HEG |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 1 |
| AIC Rating | 42kA @ 240VAC, 22kA @ 480VAC |
| Frame Type | HEG |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific Panelboards |
| Wire Gauge | 14-1/0 AWG |
| 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 Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, 2-Pole in 3-Pole Housing |
Product FAQs
7 answersWhich panelboards are compatible with the HEG421100 circuit breaker?
This bolt-on breaker is designed exclusively for legacy Federal Pacific Electric (FPE) panelboards that accept HEG frame molded case circuit breakers.
Can the HEG421100 be used to replace older Federal Pacific breakers?
Yes, the HEG421100 serves as an exact drop-in replacement for legacy NEF421100 and NEG421100 circuit breakers, allowing you to maintain existing FPE infrastructure without complex retrofits.
Does the HEG421100 require a two-pole or three-pole space in the panel?
Although it operates as a 2-pole breaker, the HEG421100 features a specialized 2-pole design housed inside a 3-pole frame. It will occupy the physical space of a 3-pole breaker in your panelboard.
Are the trip settings on the HEG421100 adjustable in the field?
No, this breaker features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous trip thresholds are factory-set and cannot be modified.
Does the HEG421100 include line and load side lugs?
This breaker is supplied with load side lugs only. The line side utilizes a bolt-on connection to attach directly to the panelboard bus.
What is the difference between the HEG421100 and HEG421100-R catalog numbers?
Both part numbers refer to the exact same 100A, 2-pole Federal Pacific HEG frame circuit breaker. They share identical physical dimensions, mounting configurations, and electrical specifications.
What safety and testing standards apply to the HEG421100?
This breaker is UL approved and complies with UL 489 and NEMA AB-1 standards for molded case circuit breakers used in commercial and industrial applications.
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