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Eaton / Cutler-Hammer LB3350 Molded Case Circuit Breaker
- 350A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
LB3350
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
LB3350
Quantity
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Eaton / Cutler-Hammer LB3350 - 350A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial and industrial applications, the Eaton LB3350 is a 3-pole, 350A molded case circuit breaker from the legacy L-Frame family. It provides reliable thermal-magnetic protection with an interchangeable trip unit. This bolt-on MCCB installs into Pow-R-Line 4 panelboards, Pow-R-Line C switchboards, and older Westinghouse CDP panels. For modern upgrades, it is replaced by the Series C LD3350. Rated to handle 42kAIC at 240VAC, it delivers robust fault interruption.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LB3350-R |
| Series | LB |
| Amperage | 350A |
| 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
8 answersWhat panelboards are compatible with the LB3350 circuit breaker?
The LB3350 is designed to bolt into Eaton Pow-R-Line 4 panelboards, Pow-R-Line C switchboards, and legacy Westinghouse CDP panelboards.
How is the LB3350 mounted into a legacy Westinghouse CDP panelboard?
Installing this L-frame breaker into a CDP panelboard requires a dedicated mounting hardware kit, such as the KCDP-LB or LB1K. These kits include the necessary copper connectors, brackets, and covers to bolt the breaker securely to the bus.
What is the difference between the LB3350 and the HLB3350?
The LB3350 is the standard interrupting capacity version, while the HLB3350 is the high interrupting capacity variant. Both share the same physical L-frame dimensions and mount identically in compatible panelboards.
What is the modern replacement for the legacy LB3350?
The Eaton Series C LD3350 is the modern direct replacement for the legacy LB3350. It fits the exact same footprint and utilizes the same mounting hardware in existing panelboards.
What does the adjustable magnetic trip on the LB3350 control?
The adjustable magnetic trip allows electricians to set the instantaneous short-circuit pickup level. This provides customized fault protection while the thermal element remains fixed for standard overload protection.
Can the LB3350 be utilized in DC power systems?
Yes, the LB3350 is rated for DC applications up to 250VDC, providing a maximum interrupting capacity of 20kA for those specific systems.
What safety standards does the LB3350 comply with?
This L-frame molded case circuit breaker is UL 489 listed and CSA certified, meeting NEMA AB-1 standards for safe use in commercial and industrial power distribution systems.
Does the LB3350 include terminals for wire connections?
Yes, the LB3350 comes equipped with load side lug terminals for field wiring. The line side is designed to bolt directly to the panelboard bus using the appropriate mounting hardware kit.
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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.