LB3400F - 400Amp Max. *Frame Only*
- 400 Amp
- 22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
- 3 Pole
Purchase Options: New Surplus
LB3400F - 400Amp Max. *Frame Only* Description
LB3400F - 400Amp Max. *Frame Only*
The LB3400F is a 400-amp, 3-pole Type LB thermal-magnetic circuit breaker frame rated for 40°C operation. Its interrupting ratings are 22kA at 600VAC, 30kA at 480VAC, and 42kA at 240VAC. Just as important, this is a FRAME ONLY product—not a complete circuit breaker assembly. That distinction matters when you're replacing a component in equipment that's already in service. Properly selected, completed with the components required by the application, installed, and operated within its specified ratings, the LB3400F is built to last in the job it was designed to do.
Key Features and Benefits
- 400A, 3-pole Type LB frame
- FRAME ONLY configuration
- Thermal-magnetic circuit breaker frame
- Rated for 40°C
- Published dimensions make it easier to check physical compatibility
- Suitable for form, fit, and functional replacement when the complete specifications match the existing application
- A practical choice for compatible existing and legacy equipment requiring this specific Type LB frame
Technical Specifications
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Part Number: LB3400F
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Type: LB
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Configuration: Frame only
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Amperage: 400A
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Poles: 3
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Type of Breaker: Thermal-magnetic
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AIC at 600VAC: 22kA
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AIC at 480VAC: 30kA
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AIC at 240VAC: 42kA
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Temperature Rating: 40°C
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Height: 10.13 in.
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Width: 5.50 in.
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Depth: 3.94 in.
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Dimensions: 5.50"W × 10.13"L × 3.94"D
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Approx. Ship Weight: 16.00 lbs.
Material Compliance and Certifications
No specific UL, CSA, IEC, RoHS, REACH, or other certification or material-compliance information was provided for the LB3400F. Don't assume those details based on the Type LB designation or electrical ratings.
Where It Works Best
The LB3400F makes the most sense in existing equipment that specifically requires a 400A, 3-pole Type LB frame with these dimensions and interrupting ratings. It can be especially relevant when maintaining legacy electrical equipment, and the objective is to preserve the original form, fit, and function.
Since you're working with a frame only, make sure you account for the rest of the required assembly. Confirm the trip-unit requirements and any other components the equipment calls for. They shouldn't be assumed to come with the frame.
Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. CIRCUIT BREAKER SUPERSTORE® is an independent reseller and is not an authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do not apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.
Eaton®, Cutler-Hammer®, Westinghouse®, Challenger®, Bussmann®, Edison®, Edison Fuse®, GTE Sylvania®, Crouse-Hinds®, and Cooper® are registered trademarks of Eaton Corporation plc. Products sold are surplus, used, or refurbished and are NOT supplied by Eaton Corporation plc or its affiliates.
Specifications
- Width:5.5
- Height:10.13
- Depth:3.94
- Poles:3
- Amperes:400
- A.I.C. Rating & Volts:22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
- Type:LB
- Approx Dimensions:5.50"W x 10.13"L x 3.94"D
- Additional Notes:40°C Rated, Thermal Magnetic Circuit Breaker **FRAME ONLY** - discontinued by the Manufacturer
Returns are easy
You may return unused items within 30 days of delivery for a full refund.
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CIRCUIT BREAKER SUPERSTORE® provides a limited 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer).