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Eaton / Cutler-Hammer HLB3175 Molded Case Circuit Breaker
- 175A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
HLB3175
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HLB3175
Quantity
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Eaton / Cutler-Hammer HLB3175 - 175A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Operating as a core component in industrial power systems, this 175A molded case circuit breaker offers dependable thermal-magnetic protection. It belongs to the high-capacity Mark 75 family of L-frame devices. The breaker fastens into Westinghouse motor control centers, switchboards, and panelboards using standard bolt-on terminals. When maintenance requires a modern substitute, the HKD3175 serves as the official replacement.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HLB3175-R |
| Series | HLB |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Frame Type | HLB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Motor Control Centers, Switchboards |
| Wire Gauge | 6 AWG - 350 kcmil |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Lug Kits, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | NEMA AB-1, UL 489, IEC 157-1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Interchangeable Trip Unit |
Product FAQs
6 answersCan I install this Eaton breaker in an older Westinghouse panel?
Yes, Eaton acquired the Cutler-Hammer and Westinghouse distribution equipment lines. The HLB3175 is directly compatible with legacy Westinghouse panelboards, switchboards, and motor control centers designed for L-frame breakers.
What does the LI trip function code indicate on the HLB3175?
The LI designation means the breaker provides Long-Time (thermal) protection for sustained overloads and Instantaneous (magnetic) protection for short circuits. On this specific model, the thermal setting is fixed while the magnetic trip is adjustable.
What wire sizes are supported by the terminals on the HLB3175?
The standard lugs on this breaker accept wire gauges ranging from 6 AWG up to 350 kcmil.
Can the HLB3175 be utilized in 250VDC applications?
Yes, this breaker is rated for both AC and DC systems. It provides up to 22kAIC of interrupting capacity when installed in a 250VDC circuit.
Does the HLB3175 plug into the panelboard?
No, this is a bolt-on circuit breaker. It must be mechanically bolted directly to the busbars in compatible panelboards or switchboards.
What frame size and family does the HLB3175 belong to?
It is an L-frame breaker that is part of the Mark 75 family, originally developed by Westinghouse and now managed under the Eaton Cutler-Hammer brand.
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