General Electrics THKMA836500 - 500 A, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing the General Electrics THKMA836500 - 500A, 3-Pole Bolt-On Circuit Breaker. Built to protect large branch circuits in panelboards and loadcenters, this molded case circuit breaker offers dependable overcurrent and short-circuit protection for residential, commercial, and light industrial settings.

Why this breaker stands out

• Secure bolt-on mounting: Delivers a rigid, vibration-resistant bus connection that stays put through equipment start-ups and routine operation.
• Thermal-magnetic trip unit: Provides stable, repeatable protection by combining thermal overload sensing with magnetic short-circuit protection for fast response.
• Three-pole, 500 A capacity: Ensures synchronized switching for three-phase circuits, ideal for feeders and main distribution in medium-load panels.
• OEM-compatible design: Specifically designed to be compatible with matching General Electrics OEM loadcenters and panelboards, reducing installation headaches.
• Versatile applications: Suitable for residential, commercial, and light industrial environments where reliable branch-circuit protection is critical.

How it works and typical use cases

The THKMA836500 is a thermal-magnetic molded case circuit breaker (MCCB). In practical terms, it protects conductors and equipment from overcurrent conditions and short circuits by tripping when the current exceeds safe limits. The 3-pole configuration provides coordinated protection across three-phase systems common in commercial and industrial panels, while the bolt-on mounting ensures a solid, bus-friendly installation in appropriately rated enclosures.

Use cases include feeding large branch circuits in panelboards, main feeders in commercial loadcenters, and as a reliable protection device in light industrial control panels. When replacing an older unit, verify that the mounting style and trip characteristics match the OEM panel requirements to ensure seamless integration.

Technical snapshot

• Manufacturer: General Electrics
• Part number: THKMA836500
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 500A
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for installation and maintenance

Ensure the enclosure accepts a bolt-on MCCB of this rating and pole count. Confirm conductor sizing aligns with the 500 A rating and three-phase supply. Maintain clean, dry connections and follow all local electrical codes during installation. For ongoing reliability, periodically inspect the mounting hardware and verify that the device remains firmly seated in the panel to preserve the integrity of the bus connection.