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Eaton / Westinghouse JB3250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
JB3250
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
JB3250
Quantity
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Eaton / Westinghouse JB3250 - 250A 3 Pole Molded Case Circuit Breaker
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Description
Designed to support heavy industrial loads, this 250A Series C component provides fixed thermal and adjustable magnetic trip functions. The bolt-on configuration integrates smoothly into older Westinghouse panelboards and Eaton Pow-R-Line systems. Facility managers can utilize this unit to replace aging JDB3250 or JD3250 hardware without modifying the enclosure. Delivering 22kAIC at 480VAC, the device supports reverse feeding and carries full HACR approval for specialized applications.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Series | JB |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | JB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Eaton Pow-R-Line Panelboards, Switchboards, Motor Control Centers |
| 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 | Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489, Federal Specification W-C-375b |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
5 answersWhich panelboards accept the JB3250 circuit breaker?
The JB3250 is a Series C J-Frame breaker compatible with legacy Westinghouse panelboards, Eaton Pow-R-Line panelboards, switchboards, and motor control centers.
What is the adjustable magnetic trip range for the 250A JB3250?
The magnetic trip on the JB3250 can be adjusted from a low setting of 1250A to a high setting of 2500A. The thermal overload protection is fixed at 250A.
What is the required tightening torque for the JB3250 wire terminals?
For the standard TA250KB aluminum and copper lugs accepting 4 AWG to 350 kcmil wire, the required tightening torque is 275 lb-in. If the breaker is equipped with T250KB copper-only lugs, the torque is 180 lb-in.
Does the JB3250 require a specific mounting hardware kit?
Yes, because the JB3250 is a bolt-on J-Frame breaker, it requires a compatible Series C J-Frame mounting hardware kit to properly secure the line connections to the panelboard bus.
Are Westinghouse and Eaton JB3250 breakers interchangeable?
Yes. Eaton acquired the Westinghouse distribution and control business, so a JB3250 branded by Eaton, Cutler-Hammer, or Westinghouse is the exact same Series C J-Frame breaker and is physically and electrically interchangeable.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
1 review
- RMRonald M.ReviewingEaton / Westinghouse JB3200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/30/17Better than expected
The part arrived packaged like new. I installed and was up and running in minutes. I will be purchasing what ever I can in the future. A great deal and a great Company to deal with Thanks, R. Martin