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Eaton / Westinghouse HFB2020 Molded Case Circuit Breaker
- 20A
- 2 Pole
- Unit Mount
Eaton / Westinghouse
HFB2020
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
HFB2020
Quantity
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Eaton / Westinghouse HFB2020 - 20A 2 Pole Molded Case Circuit Breaker
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Description
Part of the classic Mark 75 family, the Eaton HFB2020 is a 2-pole, 20A molded case circuit breaker for commercial and industrial applications. It provides reliable thermal-magnetic protection for branch circuits. Engineered as an exact fit, it mounts into legacy Westinghouse F-Frame panelboards, Eaton Series C panels, and motor control centers. It seamlessly replaces older units and crosses to the modern HFD2020. Rated 65kAIC at 240V, it includes line and load lugs for quick installation.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | HFB2020-R |
| Series | HFB |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse F-Frame Panelboards, Eaton Series C Panelboards, Motor Control Centers |
| 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 | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity |
Product FAQs
6 answersWhat enclosures and panelboards are compatible with the HFB2020?
This F-Frame breaker is designed for use in Westinghouse F-Frame panelboards, Eaton Series C panelboards, and compatible motor control centers. Because Eaton acquired the Westinghouse electrical division, these breakers fit the same legacy and modern Series C enclosures.
What type of wiring can be used with the standard lugs on this breaker?
The factory lugs accept wire gauges from 14 AWG up to 1/0 AWG. They are dual rated for both copper (Cu) and aluminum (Al) conductors.
Can the HFB2020 be used in direct current (DC) systems?
Yes, this thermal magnetic breaker is rated for DC applications up to 250VDC, providing an interrupting capacity of 10kAIC at that voltage.
Does the HFB2020 snap into the panelboard bus?
No, this is a unit mount, bolt-on circuit breaker. It must be securely bolted to the panelboard bus or mounting pan, which provides a rigid connection suitable for high-vibration environments like motor control centers.
Why is this breaker listed under both Eaton and Westinghouse?
Eaton acquired the Westinghouse electrical distribution equipment division in 1994. The HFB frame and Mark 75 family continued under the Eaton and Cutler-Hammer brands, making them physically and electrically equivalent to the original Westinghouse models.
What does the Mark 75 designation mean for the HFB2020?
The Mark 75 family indicates a high interrupting capacity design. For the HFB2020, this provides up to 65kAIC at 240VAC and 25kAIC at 480VAC, which offers greater fault current protection than standard F-Frame breakers.
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