Eaton / Westinghouse HFB2110 Molded Case Circuit Breaker
- 110A
- 2 Pole
- Unit Mount
Quantity
Eaton / Westinghouse HFB2110 - 110A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
A drop-in replacement for older systems, the Eaton HFB2110 is a 2-pole, 110A molded case circuit breaker. Part of the Mark 75 series, it delivers dependable thermal-magnetic trip functions for commercial facilities. Designed for unit-mount installations, this F-frame device fits perfectly into Westinghouse F-Frame panelboards and Series C enclosures. The HFD2110 is the modern substitute. With a 65kAIC rating at 240VAC, it offers high interrupting capacity and is HACR rated for HVAC equipment.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Series | HFB |
| Amperage | 110A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | HFB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse F-Frame Panelboards, Eaton Series C Panelboards, Motor Control Centers |
| Wire Gauge | 4-4/0 AWG (Cu/Al) |
| Max Wire | 4/0 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, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
6 answersWhich panelboards are compatible with the HFB2110?
This F-frame breaker is designed to bolt into legacy Westinghouse F-Frame panelboards, Eaton Series C panelboards, and compatible motor control centers.
What is the recommended wire size and lug torque for the HFB2110?
The breaker accepts 4 to 4/0 AWG copper or aluminum conductors. The standard terminal lugs for this wire range require a tightening torque of 120 lb-in (13.6 Nm).
What does the Mark 75 family designation indicate?
Mark 75 is a legacy Westinghouse classification for high-interrupting capacity breakers. This model achieves a 65kAIC rating at 240VAC and 25kAIC at 480VAC.
How does the thermal-magnetic trip unit protect the circuit?
The breaker features a fixed thermal-magnetic trip unit with Long-Time and Instantaneous (LI) functions. The thermal component responds to sustained overloads, while the magnetic component quickly clears short circuits.
Can the HFB2110 be installed in DC power systems?
Yes, this breaker supports direct current applications up to 250VDC, providing a 10kA interrupting capacity for DC circuits.
What is the mounting style for the HFB2110?
It is a unit-mount, bolt-on circuit breaker. The line-side connections must be bolted directly to the panelboard bus, ensuring a secure connection in commercial and industrial environments.
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