GE THJK436400WL - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

GE THJK436400WL is a 400 A, 600 V, 3-pole molded case circuit breaker designed to safeguard panelboards and load centers with dependable branch circuit overcurrent and short-circuit protection. Distributed by AmpState, this unit is built to perform in demanding commercial and light industrial environments while keeping installation compact and organized.

Why this 3-pole molded case breaker stands out

• Compact molded-case design: Optimizes panel space and simplifies wiring in crowded panels, making it easier to bundle conductors and manage protection for multiple circuits.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by combining a thermal overload element with an instantaneous magnetic trip for short circuits, reducing nuisance trips and improving system reliability.
• Three-phase protection: Perfect for balanced three-phase feeders and main breaks, ensuring coordinated protection across your entire 3‑phase distribution network.
• OEM‑level compatibility: Designed for seamless integration with GE OEM load centers and panelboards, supporting straightforward retrofits and future panel upgrades.
• High voltage capability: Rated up to 600 V, making it suitable for a range of commercial and light industrial distribution applications while aligning with typical NEC protection requirements.

Ideal uses and practical applications

• Commercial buildings: Main feeders and subpanels in offices, retail spaces, and hospitality settings where reliable 3‑phase protection is critical.
• Light industrial environments: Protection for motors, conveyors, HVAC equipment, and other three‑phase loads that demand robust overcurrent and short-circuit safeguarding.
• Panel retrofits and upgrades: A compatible upgrade path for panels needing higher ampacity protection without changing the panel footprint.

Installation, compatibility, and best practices

• Confirm panel compatibility: Use with GE OEM load centers and appropriate panelboards to ensure proper fit, electrical clearances, and listing compliance.
• Follow proper termination practices: Adhere to torque specifications and conductor sizing guidelines to assure reliable clamping and long-term service.
• Plan for three‑phase system protection: Ensure downstream devices and wiring are sized to match the 400 A rating and 600 V operation for safe, coordinated protection.

GE THJK436400WL delivers dependable, space-efficient protection for three‑phase systems at 400 A and up to 600 V, combining a compact design with a thermal‑magnetic trip for reliable response. Ideal for commercial, light industrial, and select residential applications where panel space is at a premium and robust overcurrent protection is required.