THLC434350WL - 350Amp Circuit Breaker

THLC434350WL - 350 Amp Circuit Breaker

The THLC434350WL is a 350-amp, 3-pole current limiting circuit breaker designed for use in your commercial and industrial power distribution systems. Featuring a fixed, non-interchangeable trip unit and an unfused design, this breaker provides overcurrent protection for circuits where high fault current levels may be present. It comes equipped with both line-side and load-side lugs, helping you to simplify installation in compatible equipment. With an interrupting capacity of 150kA at 480VAC and 200kA at 240VAC, the THLC434350WL is intended for applications that require substantial short-circuit protection. Its current limiting design helps you reduce the amount of energy that passes through the system during fault conditions. Built for long-term service, this breaker is often used as a direct replacement in existing electrical distribution equipment where matching ratings and physical compatibility are important.

Key Features and Benefits

• 350 Amp current rating
• 3-pole configuration for three-phase systems
• Current limiting circuit breaker design
• Fixed, non-interchangeable trip unit
• Unfused construction
• Includes line-side and load-side lugs
• 150kA interrupting rating at 480VAC
• 200kA interrupting rating at 240VAC
• Designed for use in compatible power distribution equipment
• Built for long service life in demanding electrical environments

Technical Specifications

• Part Number: THLC434350WL
• Type: THLC4
• Amperage: 350A
• Poles: 3
• Interrupting Rating: 150kA @ 480VAC
• Interrupting Rating: 200kA @ 240VAC
• Configuration: Unfused Current Limiting Circuit Breaker
• Trip Unit: Non-Interchangeable
• Included Accessories: Line-Side and Load-Side Lugs
• Height: 13.06 in.
• Width: 5.72 in.
• Depth: 4.88 in.

Material Compliance and Certifications

• This circuit breaker is manufactured for use in electrical distribution systems and should be installed and maintained in accordance with applicable electrical codes, equipment requirements, and site-specific specifications. Users should verify suitability for their intended application before installation.

Where It Works Best

• The THLC434350WL is commonly found in:
• Industrial facilities
• Manufacturing plants
• Commercial buildings
• Power distribution systems
• Switchgear installations
• Feeder circuit protection applications
• Maintenance and replacement projects involving compatible THLC4 equipment
• When maintaining existing electrical infrastructure, matching the correct ampere rating, interrupting capacity, and breaker type is critical. The THLC434350WL provides a form, fit, and functional replacement option for compatible systems requiring a 350A, 3-pole current limiting circuit breaker.