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Eaton / Cutler-Hammer LB3300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
LB3300
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
LB3300
Quantity
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Eaton / Cutler-Hammer LB3300 - 300A 3 Pole Molded Case Circuit Breaker
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Description
A drop-in replacement for aging distribution systems, the Eaton LB3300 is a 3-pole, 300A legacy MCCB. It utilizes an interchangeable thermal-magnetic trip unit, allowing facilities to maintain existing L-Frame infrastructure without a complete panel overhaul. Designed for secure bolt-on mounting, it is compatible with Pow-R-Line 4, Pow-R-Line C, and classic Westinghouse CDP enclosures. It crosses over to the Series C LD3300. It offers 30kAIC at 480V. Lug kits are sold separately.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LB3300-R |
| Series | LB |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 20kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Pow-R-Line 4 Panelboards, Pow-R-Line C Switchboards, Westinghouse CDP Panelboards |
| 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, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
6 answersWhich panelboards accept the LB3300 circuit breaker?
The LB3300 is a legacy L-Frame breaker designed for bolt-on installation. It is directly compatible with Eaton Pow-R-Line 4 panelboards, Pow-R-Line C switchboards, and classic Westinghouse CDP panelboards.
Are Eaton, Cutler-Hammer, and Westinghouse LB3300 breakers interchangeable?
Yes. Eaton acquired the Cutler-Hammer and Westinghouse electrical distribution lines. An LB3300 breaker carrying any of these three brand names shares the exact same L-Frame footprint, mounting configuration, and internal components.
What is the Series C crossover for the legacy LB3300?
Facilities looking to upgrade from the legacy L-Frame LB3300 can cross this unit over to the Eaton Series C LD3300. The LD3300 serves as the modern replacement for aging distribution systems requiring a 300A, 3-pole configuration.
How is the trip unit configured on the LB3300?
The LB3300 utilizes a thermal-magnetic trip unit with Long-Time and Instantaneous (LI) functions. The thermal element is fixed for standard overload protection, while the magnetic instantaneous trip is adjustable to coordinate with downstream devices and specific fault current requirements.
Is the LB3300 suitable for DC voltage systems?
Yes, the LB3300 is rated for use in both AC and DC electrical systems. It supports up to 250VDC with a 20kA interrupting capacity, making it suitable for industrial DC distribution applications.
Does the LB3300 include load side terminals?
Yes, this specific configuration includes load side lug terminals for conductor termination. The line side utilizes a bolt-on connection directly to the panelboard bus.
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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.