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Eaton / Westinghouse LB3100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
LB3100
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
LB3100
Quantity
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Eaton / Westinghouse LB3100 - 100A 3 Pole Molded Case Circuit Breaker
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Description
A drop-in solution for legacy systems, the Eaton LB3100 is a 3-pole, 100A molded case circuit breaker. It delivers robust thermal-magnetic protection for commercial 3-phase networks. Designed for bolt-on installation, this L-Frame breaker fits seamlessly into vintage Westinghouse panelboards. Utilizing this exact replacement prevents the hassle of modifying existing buswork to accommodate the newer FD3100 substitute. It provides a 42kAIC interrupting rating at 240VAC.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | LB3100 |
| Series | LB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | LB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | #6 AWG - 350 kcmil |
| Max Wire | 350 kcmil |
| Min Wire | #6 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 Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
6 answersWhat types of enclosures are compatible with the LB3100?
This breaker is designed for use in legacy Westinghouse panelboards, switchboards, and motor control centers that accept bolt-on L-frame circuit breakers.
How does the trip unit function on this breaker?
It utilizes a thermal magnetic trip unit with a fixed thermal element for standard overload protection and an adjustable magnetic element, allowing electricians to set the instantaneous short-circuit trip threshold.
Can this breaker be installed in direct current systems?
Yes, it is rated for use in DC applications up to 250VDC, providing an interrupting capacity of 20kA at that voltage.
What wire sizes are accepted by the standard lugs on this breaker?
The included lugs accommodate wire gauges ranging from #6 AWG up to 350 kcmil. Always verify the conductor material and apply the manufacturer specified torque during installation.
Is there a difference between the Eaton and Westinghouse versions of this breaker?
No. The Westinghouse distribution equipment division was acquired by Eaton. Breakers labeled under Westinghouse, Cutler-Hammer, or Eaton with this catalog number share the same physical dimensions and electrical characteristics.
What is the mounting configuration for this L-frame breaker?
It features a bolt-on connection, meaning the line side terminals bolt directly to the panel busbars rather than snapping into place. This provides a secure, high-vibration resistant connection.
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Reviews
Review summary
Customers rate this product 4.5 out of 5 based on 2 reviews.
Total 5 star reviews: 1 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- KMKaren M.ReviewingEaton / Westinghouse LB3200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/29/22Great Resource
The website is easy to use and the shipping is very quick will continue to use SuperBreakers
- RRRashida R.ReviewingCutler-Hammer / Westinghouse LB3400F FrameI recommend this productRated 4 out of 5 stars6/18/17Purchase of CH LB3400F
Circuit breaker was shipped in very timely manner. Tracking # was correct.