Federal Pacific HEF435090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Federal Pacific
HEF435090
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
HEF435090
Quantity
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Federal Pacific HEF435090 - 90A 3 Pole Molded Case Circuit Breaker
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Description
A drop-in replacement for discontinued FPE panels, the HEF435090 restores power distribution without requiring costly system upgrades. This 3-pole, 90A molded case circuit breaker features a bolt-on mounting design for secure connections in commercial and industrial environments. Rated at 42 kAIC at 240V and 22 kAIC at 480V, it provides robust thermal-magnetic trip protection. It serves as an exact cross-reference for older NEF435090 units and UBIF090 substitutes.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | HEF435090 |
| Series | HEF |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 22kA @ 480VAC |
| Frame Type | HEF |
|---|---|
| Terminal Type | Lugs |
| For Use With | FPE Panelboards and Switchboards |
| 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 |
| 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 HEF435090 designed to fit?
This breaker is engineered specifically for legacy Federal Pacific Electric (FPE) commercial panelboards and switchboards that accept H-Frame molded case circuit breakers.
What are the wire size requirements for the HEF435090 lugs?
The included load-side lugs accommodate copper or aluminum (Cu/Al) conductors ranging from 4 AWG to 1/0 AWG. Ensure proper torque specifications are followed during installation.
Are FPE HEF commercial breakers subject to the same safety concerns as Stab-Lok load centers?
No. The well-documented safety hazards and failure rates associated with Federal Pacific Electric primarily involve their residential Stab-Lok plug-on breakers. The HEF435090 is a commercial-grade, bolt-on molded case circuit breaker and does not share the Stab-Lok design.
How does the interrupting capacity change if this breaker is used on a 240V system?
While rated for a maximum of 480VAC with a 22kAIC interrupting capacity, applying this breaker to a 240VAC system increases its short-circuit interrupting rating to 42kAIC.
Are there direct replacements for the legacy FPE HEF435090?
Because Federal Pacific Electric is no longer manufacturing new equipment, sourcing this exact breaker relies on specialized legacy electrical distributors. It serves as a direct, bolt-on replacement to maintain existing FPE commercial panelboards without requiring a full system retrofit.
Can the trip settings on the HEF435090 be adjusted in the field?
No. This breaker features a fixed thermal-magnetic trip unit with preset long-time and instantaneous (LI) trip functions. It cannot be field-adjusted for different amperage thresholds.
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