Eaton / Cutler-Hammer HKB3225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Panel Mount
Quantity
Eaton / Cutler-Hammer HKB3225 - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built to handle heavy commercial loads, this 225-amp molded case circuit breaker provides reliable thermal-magnetic trip functions. The unit is part of the trusted Mark 75 family, delivering essential LI protection. Designed for panel mount applications, it fits perfectly into Eaton Series C panelboards and standard switchboards. For facilities updating infrastructure, this model crosses over to the newer HKD3225. With a 65kA interrupting capacity at 240V, it ensures superior safety.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HKB3225-R |
| Series | HKB |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600VAC, 20kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Mark 75 Panelboards, Switchboards |
| Wire Gauge | 3 AWG - 350 kcmil |
| Max Wire | 350 kcmil |
| Min Wire | 3 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, Alarm Switch, Lug Kits |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Interchangeable Trip Unit |
Product FAQs
6 answersWhat panelboards are compatible with the HKB3225 circuit breaker?
The HKB3225 is designed for installation in Eaton Series C panelboards, legacy Westinghouse Mark 75 panelboards, and standard industrial switchboards.
Can the Eaton HKB3225 replace older Westinghouse HKB breakers?
Yes. Eaton acquired the Cutler-Hammer and Westinghouse distribution equipment lines. The Eaton HKB3225 serves as a direct replacement for legacy Westinghouse and Cutler-Hammer breakers sharing the same catalog number.
What wire sizes do the standard lugs on the HKB3225 accept?
The standard lugs on this K-Frame breaker accommodate wire gauges ranging from 3 AWG up to 350 kcmil.
What does the H in the HKB3225 catalog number indicate?
In the Mark 75 and Series C families, the H designates a high-interrupting capacity version of the standard KB frame. The HKB3225 provides a 65kA interrupting rating at 240VAC, which is higher than standard KB breakers.
How is the trip unit configured on the HKB3225?
This breaker features a thermal-magnetic trip unit with fixed thermal protection for overloads and an adjustable magnetic trip for instantaneous short-circuit response.
Can the HKB3225 be used in DC applications?
Yes, this breaker is rated for use in DC systems up to 250VDC, where it provides a 20kA interrupting capacity.
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