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Eaton / Cutler-Hammer K3150T Molded Case Circuit Breaker
- 150A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
K3150T
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
K3150T
Quantity
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Eaton / Cutler-Hammer K3150T - 150A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial environments, the Eaton K3150T is a 150A, 3-pole molded case circuit breaker. As part of the Series C K-Frame family, it provides robust thermal-magnetic protection with LI trip functions for 600VAC systems. This bolt-on MCCB is designed for use with Eaton Series C and legacy Westinghouse panelboards. It accommodates 3 AWG to 350 kcmil wiring and replaces older KD3150 breakers in existing enclosures. Delivering 22 kAIC at 480VAC, it ensures reliable fault clearing.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | K3150T-R |
| Series | K |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 22kA @ 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
6 answersCan the K3150T replace an older Westinghouse KD3150 breaker?
Yes. The Eaton K3150T is a direct physical replacement for the legacy Westinghouse KD3150 in Series C panelboards, switchboards, and motor control centers. Note that the K3150T has a standard interrupting rating of 22 kAIC at 480V, whereas the KD3150 has a higher interrupting capacity. Always verify your system fault current requirements before substituting.
What enclosures and panelboards are compatible with the K3150T?
This K-frame breaker is designed to bolt directly into Eaton Series C panelboards, legacy Westinghouse panelboards, motor control centers, and commercial switchboards.
What lug kit is standard for the K3150T, and what is the wire range?
The K3150T typically uses the TA300K standard pressure lug kit, which accepts 3 AWG to 350 kcmil aluminum or copper wire.
What is the recommended tightening torque for the standard TA300K lugs on this breaker?
The TA300K lugs should be torqued to 275 lb-in. Always verify the torque specifications printed on the breaker faceplate or lug label before finalizing the installation.
What does the T stand for in the K3150T catalog number?
The T indicates that the breaker is supplied complete with a factory-installed thermal-magnetic trip unit and standard line and load terminals.
Is the trip unit on the K3150T adjustable?
The K3150T features a thermal-magnetic trip unit with a fixed thermal long-time setting of 150A and an adjustable magnetic instantaneous trip setting. This allows you to fine-tune the short-circuit response for your specific application.
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