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Eaton / Cutler-Hammer K3225T Molded Case Circuit Breaker
- 225A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
K3225T
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
K3225T
Quantity
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Eaton / Cutler-Hammer K3225T - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Built for industrial power distribution, this 225-amp Series C breaker ensures consistent long-time and instantaneous trip functions. The bolt-on configuration fits perfectly into compatible Eaton and Westinghouse motor control centers or switchboards. Featuring an interchangeable trip unit and reverse feed capabilities, this 600VAC-rated component offers versatile installation options while maintaining a 25kAIC rating at 240V for commercial safety.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | K3225T-R |
| Series | K |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 10kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Westinghouse Panelboards, Motor Control Centers, Switchboards |
| Wire Gauge | 3 AWG - 350 kcmil (Al/Cu) |
| 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 |
|---|---|
| Accessories | Line and Load Lugs (Factory Installed) |
| Standards | CSA C22.2 No. 5.1, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit, Reverse Feed |
Product FAQs
8 answersWhich panelboards and enclosures are compatible with the K3225T circuit breaker?
This breaker is designed for use in Eaton Series C panelboards, legacy Westinghouse panelboards, motor control centers, and switchboards that accept K-frame bolt-on breakers.
What is the physical frame size of the K3225T?
It is built on the Eaton Series C K-frame platform. When replacing existing breakers, any standard K-frame footprint will match, though you must verify that the interrupting ratings meet your system requirements.
How is the trip unit configured on this breaker?
The K3225T features a thermal-magnetic trip unit with fixed thermal protection for standard overloads and an adjustable magnetic dial to fine-tune short-circuit response based on your specific load requirements.
Are the lugs included with this breaker, and what wire types do they accept?
Yes, the K3225T comes with factory-installed lugs that accept either aluminum or copper conductors ranging from 3 AWG to 350 kcmil.
What does the LI trip function code indicate for the K3225T?
The LI designation means the breaker provides Long-Time (L) protection against sustained overloads and Instantaneous (I) protection against sudden short circuits, which is standard for general power distribution.
Can the K3225T be used in direct current applications?
Yes, this breaker is rated for use on DC systems up to 250VDC, where it provides an interrupting capacity of 10kAIC.
What does the T suffix in the K3225T catalog number mean?
In the Eaton Series C nomenclature, the T suffix indicates that the breaker is supplied as a complete unit, including the thermal-magnetic trip unit and factory-installed line and load lugs.
Can the K3225T be used to replace older Westinghouse KD3225 breakers?
While both are 225A K-frame breakers, the standard K3225T has a 22kAIC rating at 480VAC, whereas KD3225 breakers have a higher 35kAIC rating at 480VAC. You must verify that your available system fault current does not exceed 22,000 amps before substituting.
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