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Eaton / Westinghouse JK3150 Molded Case Circuit Breaker
- 150A
- 3 Pole
- Unit Mount
Eaton / Westinghouse
JK3150
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
JK3150
Quantity
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Eaton / Westinghouse JK3150 - 150A 3 Pole Molded Case Circuit Breaker
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Description
The Eaton JK3150 is a 3-pole, 150A molded case circuit breaker designed for commercial and industrial power distribution. Built with a rugged Series C J-Frame architecture, it provides dependable overcurrent protection. This unit mount breaker installs into legacy Westinghouse panelboards, switchboards, and motor control centers. It serves as an exact drop-in replacement for discontinued JDB3150 and HJD3150 breakers. It features a 65kAIC rating at 240V and fixed thermal-magnetic trip functions.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | JK3150-R |
| Series | JK |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 30kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse Panelboards, Switchboards, Motor Control Centers, Eaton Series C Panelboards |
| Wire Gauge | 4 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 4 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 | Load Side Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
8 answersWhat panelboards are compatible with the JK3150 circuit breaker?
The JK3150 is designed for use in legacy Westinghouse panelboards, switchboards, and motor control centers, as well as Eaton Series C panelboards.
Can the JK3150 replace older discontinued breakers?
Yes, the JK3150 serves as an exact drop-in replacement for discontinued JDB3150 and HJD3150 circuit breakers.
What wire sizes are accepted by the lugs on the JK3150?
The load side lugs accept 4 AWG to 350 kcmil aluminum or copper wire.
How does the trip unit on the JK3150 operate?
It features a thermal-magnetic trip unit with a fixed thermal element for overload protection and an adjustable magnetic element, allowing you to set the instantaneous short-circuit trip threshold.
Does the JK3150 breaker include lugs?
Yes, this unit mount breaker comes complete with load side lug terminals for wire connections.
Is the JK3150 rated for DC applications?
Yes, in addition to its AC ratings, this breaker is rated for up to 250VDC with a 10kA interrupting capacity.
Is the JK3150 suitable for HVAC applications?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment.
What does the LI trip function code indicate on the JK3150?
The LI designation means the breaker provides Long-Time (L) overload protection and Instantaneous (I) short-circuit protection.
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