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Eaton / Westinghouse LAB3250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
LAB3250
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
LAB3250
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Eaton / Westinghouse LAB3250 - 250A 3 Pole Molded Case Circuit Breaker
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250A 3 Pole Molded Case Circuit Breaker
250A 3 Pole Molded Case Circuit Breaker
Description
A drop-in replacement for aging infrastructure, the Eaton LAB3250 restores reliable power distribution in commercial and industrial facilities. This 3-pole, 250A molded case circuit breaker mounts into legacy Westinghouse panelboards, switchboards, and motor control centers. By matching the original L-Frame footprint, it allows for straightforward maintenance without requiring adapter kits. The breaker delivers a 30kAIC rating at 480VAC and includes an adjustable magnetic trip mechanism.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | LAB3250-R |
| Series | LAB |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse 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 | Line and Load Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Standard Interrupting Capacity |
Product FAQs
5 answersWhich equipment is the LAB3250 designed to fit?
This L-Frame molded case circuit breaker is engineered as a direct replacement for legacy Westinghouse panelboards, switchboards, and motor control centers without requiring adapter kits.
How are the line and load connections configured on the LAB3250?
As a bolt-on breaker, the line side bolts directly to the panelboard or switchboard bus. The load side is equipped with lug terminals that accept 4 AWG to 350 kcmil aluminum or copper conductors.
How is the thermal-magnetic trip unit configured on this breaker?
The LAB3250 uses an LI (Long-Time, Instantaneous) trip profile. The thermal element for long-time overload protection is fixed, while the magnetic element for instantaneous short-circuit protection is adjustable to coordinate with downstream loads.
Is the LAB3250 an Eaton or Westinghouse product?
The LAB3250 was originally designed by Westinghouse. Following Eaton's acquisition of the Westinghouse electrical distribution business, these legacy L-Frame breakers are supported and distributed under the Eaton and Cutler-Hammer brands.
What are the primary safety requirements for installing this L-Frame breaker?
Installation must be performed by a qualified electrical worker. Ensure the panelboard or motor control center is completely de-energized, locked out, and tagged out before bolting the breaker to the bus.
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