Eaton / Westinghouse JKL3250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Quantity
Eaton / Westinghouse JKL3250 - 250A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
A drop-in replacement for legacy Westinghouse and Cutler-Hammer systems, the Eaton JKL3250 is a 3-pole, 250A molded case circuit breaker built for commercial and industrial applications. It installs into older panelboards, switchboards, and motor control centers where original Series C J-Frame breakers were specified. Featuring thermal-magnetic trip technology with adjustable magnetic settings, this unit mount MCCB provides reliable LI protection and a 65kAIC interrupting rating at 240VAC.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | JKL3250-R |
| Series | JKL |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse/Eaton Panelboards (e.g., PRL4), Switchboards, Motor Control Centers |
| Wire Gauge | (1) 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 | High Interrupting Capacity |
Product FAQs
7 answersWhat types of enclosures and panelboards are compatible with the JKL3250?
The JKL3250 is designed for use in Westinghouse and Eaton panelboards, such as the PRL4 series, as well as compatible switchboards and motor control centers that accept Series C J-Frame breakers.
How does the adjustable magnetic trip function work on this breaker?
The JKL3250 features a thermal-magnetic trip unit with a fixed thermal element for overload protection and an adjustable magnetic element. This allows you to tune the instantaneous short-circuit trip point to coordinate with downstream devices and handle specific motor inrush currents.
What lug kit is standard for the JKL3250 circuit breaker?
The standard lug kit for 250A Series C J-Frame breakers is the TA250KB, which accepts one 4 AWG to 350 kcmil aluminum or copper wire per phase.
Is the Westinghouse JKL3250 the same as the Eaton JKL3250?
Yes. Eaton acquired the Westinghouse distribution equipment division, so the JKL3250 is manufactured to the exact same specifications and is a direct drop-in replacement for legacy Westinghouse or Cutler-Hammer installations.
Can the JKL3250 be used in DC applications?
Yes, this breaker is rated for up to 250VDC with an interrupting capacity of 10kA, making it suitable for specific direct current systems in addition to its standard AC ratings.
What is the difference between the JKL3250 and other J-Frame breakers like the JD3250 or HJD3250?
The primary difference is the interrupting capacity. The JKL3250 has specific fault current ratings, such as 30kA at 480VAC, which differ from other models in the Series C J-Frame family. Always verify the required fault current rating for your specific application before substituting breaker types.
How is the JKL3250 mounted in a panelboard?
The JKL3250 is a unit mount, bolt-on circuit breaker. It is designed to be bolted directly to the bus or mounting pan in compatible enclosures, rather than plugging onto the bus.
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