General Electric | THJK436400WL | Circuit Breaker | 400A | 3-Pole | 600V | 35kA

The General Electric THJK436400WL circuit breaker is a rugged, industrial-grade protection device designed for demanding 3-phase electrical systems. With a 400A rating, 3-pole configuration, and a 600V maximum operating voltage, this breaker delivers reliable overcurrent protection in retrofit, maintenance, and replacement projects where exact specifications matter. Its 35kA interrupting capacity provides a robust safety margin for industrial workloads and critical equipment.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Interrupting rating: 35kA
• Part number reference: THJK436400WL

Why this GE circuit breaker stands out

• The THJK436400WL is specifically identified for matching panels and configurations requiring a 3-pole, 400A, 600V protective device. Always use the part number as the best reference for compatibility.
• Designed for retrofit and replacement: Ideal when upgrading existing installations or replacing aging breakers without compromising system protection levels.
• High fault current handling: 35kA interrupting capacity helps contain faults quickly and protect downstream equipment, wiring, and operators.
• Consistent GE performance: Built to GE engineering standards, ensuring predictable trip characteristics and reliable operation in harsh industrial environments.

Use cases and practical applications

This 400A, 3-pole GE breaker is well-suited for main distribution panels in manufacturing lines, processing plants, and large commercial or industrial facilities where a triple-phase protection device is required. It’s a solid choice for:

• Upgrading legacy 3-phase distribution circuits to meet current safety and capacity needs
• Replacing failed or obsolete breakers in GE-compatible panels
• Maintenance shutdowns where precise spec-matching reduces panel downtime
• New installations that follow GE system design standards and part labeling conventions

Fit, verification, and installation tips

Before ordering, verify that the THJK436400WL matches the panel schedule and rating requirements of your equipment. The part number is the most reliable reference for compatibility, so cross-check it against your panel manufacturer’s documentation. If upgrading from an older device, ensure any auxiliary components (busbars, mounting kits, or trip units) align with this 3-pole 400A 600V breaker to avoid fit issues.

For best results, work with a qualified electrician familiar with GE protection devices and live-load safety protocols. Proper installation ensures accurate tripping, stable operation, and maximum protection for downstream circuits and connected machinery.