General Electrics THJK636300 - 300 A, 3-Pole Bolt-On Circuit Breaker | AmpState

The General Electrics THJK636300 is a 300A, 3-pole bolt-on molded case circuit breaker designed to protect branch circuits from overcurrent and short circuits within panelboards and loadcenters. Its secure bolt-on mounting creates a rigid, vibration-resistant bus connection, helping maintain reliable electrical continuity in challenging installation environments.

Trip performance is driven by a comprehensive thermal-magnetic trip unit, delivering stable, repeatable protection. The thermal portion responds to sustained overloads, while the magnetic portion provides instantaneous protection for short-circuit events, ensuring coordinated protection across three-phase circuits.

Designed for seamless integration, this breaker is compatible with matching OEM loadcenters and panelboards, simplifying installation, maintenance, and future upfits. It’s suitable for a range of settings where dependable electrical protection is essential, including residential panelboards, commercial distribution systems, and light industrial applications.

• Amperage Rating: 300A
• Poles: 3-pole
• Mounting Style: Bolt-on
• Type: Thermal-magnetic molded case circuit breaker
• Applications: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters
• Manufacturer: General Electrics
• Part Number: THJK636300

Ideal for: technicians and engineers outfitting new installations or performing panel upgrades in residential, commercial, and light industrial environments. When you need robust, long-lasting protection for a three-phase distribution, the THJK636300 provides clear, decisive fault interruption while maintaining system stability and compatibility with existing OEM gear.

Practical usage tips: verify your panelboard compatibility with the OEM loadcenter family, torque mounting hardware to the panel’s specified requirements, and plan for coordinated protection with adjacent devices in the distribution scheme. This bolt-on solution is built for steady operation in environments where vibration and continuous operation are factors, helping reduce nuisance trips and downtime in demanding electrical rooms.