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Eaton / Cutler-Hammer HFB3090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
HFB3090
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HFB3090
Quantity
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Eaton / Cutler-Hammer HFB3090 - 90A 3 Pole Molded Case Circuit Breaker
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Description
Designed for heavy-duty distribution, the Eaton HFB3090 is a 3-pole, 90-amp MCCB. As part of the Mark 75 family, it utilizes fixed thermal-magnetic trip units to safeguard circuits. This F-Frame unit features a bolt-on configuration, making it a perfect fit for Westinghouse panelboards and Eaton Pow-R-Line C enclosures. It is succeeded by the HFD3090 in newer catalogs. Operating at up to 600VAC, the HACR-rated breaker achieves a 65kAIC interrupt capacity at 240V.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HFB3090-R |
| Series | HFB |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Pow-R-Line C Panelboards, Westinghouse Panelboards, 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Non-Interchangeable Trip |
Product FAQs
6 answersWhat panelboards are compatible with the HFB3090?
This F-frame breaker is designed for use in Eaton Pow-R-Line C panelboards, legacy Westinghouse panelboards, and compatible switchboards.
Are Westinghouse and Eaton HFB3090 breakers the same?
Yes. Eaton acquired the Westinghouse electrical distribution business. Breakers labeled as Westinghouse, Cutler-Hammer, or Eaton with the HFB3090 catalog number share the exact same F-frame design and are fully interchangeable.
What wire sizes are accepted by the standard lugs on this breaker?
The factory lugs accept wire gauges from 14 AWG up to 1/0 AWG. They are rated for both copper and aluminum conductors.
Is the HFB3090 suitable for direct current systems?
Yes, this thermal magnetic breaker is rated for DC applications up to 250V DC, where it provides a 10kA interrupting capacity.
How does this breaker connect to the panel bus?
The HFB3090 is a bolt-on circuit breaker. It requires bolted connections directly to the panelboard busbars, ensuring a secure electrical connection for high-fault applications.
Can the trip settings on the HFB3090 be adjusted?
No. This breaker features a fixed thermal magnetic trip unit with non-adjustable long-time and instantaneous trip functions.
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