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Eaton / Cutler-Hammer HFB3150 Molded Case Circuit Breaker
- 150A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
HFB3150
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HFB3150
Quantity
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Eaton / Cutler-Hammer HFB3150 - 150A 3 Pole Molded Case Circuit Breaker
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Description
Operating within the Mark 75 family, the Eaton HFB3150 is a 3-pole, 150A circuit breaker designed for heavy-duty applications. It utilizes proven thermal-magnetic technology to defend against overloads and short circuits. This component mounts securely into Eaton Pow-R-Line C enclosures, as well as older Westinghouse panelboards. It provides an exact fit for existing F-frame spaces and is cross-referenced to be replaced by the HFD3150. With an interrupting rating of 65kAIC at 240VAC, it excels.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HFB3150-R |
| Series | HFB |
| Amperage | 150A |
| 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 | 4 AWG-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 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 | High Interrupting Capacity, HACR Rated |
Product FAQs
9 answersWhat panelboards are compatible with the HFB3150?
This F-frame breaker mounts directly into Eaton Pow-R-Line C panelboards, as well as legacy Westinghouse panelboards and switchboards.
What frame size is the HFB3150?
This breaker belongs to the Eaton and legacy Westinghouse F-frame group, specifically operating within the Mark 75 family of molded case circuit breakers.
What is the modern replacement for the HFB3150?
The HFB3150 is part of the legacy Mark 75 family. It is commonly cross-referenced and replaced by the Eaton Series C HFD3150, which fits the same F-frame panel spaces.
What does the H in HFB3150 designate?
The H indicates a High Interrupting Capacity breaker compared to the standard FB series. It delivers up to 65kAIC at 240VAC for systems requiring higher fault current ratings.
Can the HFB3150 be used in DC circuits?
Yes, this breaker is rated for use in DC applications up to 250VDC, providing a 10kAIC interrupting rating for DC loads.
What type of conductors can be used with the HFB3150 lugs?
The standard factory lugs accept 4 AWG to 4/0 AWG wire and are dual-rated for both copper (Cu) and aluminum (Al) conductors.
Are the trip settings adjustable on the HFB3150?
No, this breaker features a fixed thermal-magnetic trip unit. Both the Long-Time and Instantaneous (LI) trip functions are factory-set and cannot be adjusted or replaced in the field.
How does the HFB3150 connect to the panelboard bus?
It utilizes a bolt-on mounting style, requiring mechanical fasteners to secure the breaker terminals directly to the panelboard busbars for a reliable connection.
Is the HFB3150 suitable for HVAC equipment?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires group motor protection.
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