General Electrics THKM3F - 1200 A, 3-Pole Bolt-On Circuit Breaker | AmpState

The General Electrics THKM3F is a high-capacity, 1200A, 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection inside panelboards and loadcenters. Built to endure vibration and demanding electrical environments, this unit delivers precise thermal-magnetic protection that you can rely on across residential, commercial, and light industrial installations.

• Secure bolt-on mounting: a rigid connection to the panel bus that stays put under vibration, helping maintain consistent electrical contact and protection performance.
• Thermal-magnetic trip unit: combines steady thermal overload protection with instantaneous magnetic tripping for short-circuit events, delivering stable, repeatable protection across varying temperatures and loads.
• Three-pole, 1200A rating: balanced, multi-phase protection ideal for larger feeders and multi-wire circuits within panelboards and loadcenters.
• OEM panel compatibility: designed to work with matching General Electric OEM loadcenters and panelboards for straightforward integration in existing systems.
• Versatile application: suitable for residential, commercial, and light industrial environments where robust branch-circuit overcurrent and short-circuit protection is required.

The THKM3F is more than a breaker—it's a dependable safeguard for critical electrical feeders. With its bolt-on design, you gain a secure, vibration-resistant connection that minimizes loosening risks over time. The thermal-magnetic trip mechanism reduces nuisance trips while delivering fast response to short circuits, helping protect wiring, devices, and connected equipment.

Ideal use scenarios and practical notes

• Upgrading or expanding panelboards and loadcenters in commercial spaces where large-diameter conductors and heavy-duty circuits are present.
• Retrofits in residential or light industrial panels that demand reliable protection for high-capacity feeders.
• Situations requiring a single, clearly defined 3-pole protection solution with OEM compatibility to maintain system integrity.
• Applications where a rigid, bolt-on installation reduces the risk of movement-induced faults in busy electrical rooms.

Technical snapshot for quick reference: 1200A amperage, 3 poles, bolt-on mounting, molded case protection, thermal-magnetic trip unit, General Electrics part number THKM3F. When paired with matching GE panelboards and loadcenters, it delivers cohesive protection and streamlined field installation—so you can trust your electrical system to perform when it matters most.