General Electrics TKMA836400 - 400 A, 3-Pole Bolt-On Circuit Breaker | AmpState

General Electrics TKMA836400 delivers dependable 400 amp, 3-pole protection in a bolt-on molded case design, built to shield panelboards and loadcenters from overcurrent and short-circuit events. Sold through AmpState, this GE component is purpose-built for heavy-duty electrical systems that demand robust, long-lasting performance in residential, commercial, and light industrial settings. What makes the TKMA836400 stand out - Secure bolt-on mounting for a rigid, vibration-resistant bus connection. In environments with moving equipment or channelized loads, this mounting approach helps maintain steady electrical contact and reduces the risk of loosening over time. - Thermal-magnetic trip unit for stable, repeatable protection. The integrated thermal (overload) and magnetic (short-circuit) sensing delivers fast, reliable interruption when circuits exceed limits, while minimizing nuisance trips on normal inrush or gradual load changes. - OEM-compatible for streamlined replacement. Designed to work with matching GE OEM loadcenters and panelboards, ensuring a cohesive, dependable protection scheme in existing installations. - Versatile for a range of applications. The 3-pole configuration is ideal for 3-phase systems common in commercial and light industrial environments, while still suitable for larger residential installations that require balanced, three-phase protection. Technical snapshot - Manufacturer: General Electrics - Part Number: TKMA836400 - Type: Thermal-magnetic molded case circuit breaker - Amperage Rating: 400A - Number of Poles: 3 - Mounting Style: Bolt-on - Application: Branch circuit overcurrent and short-circuit protection Ideal use scenarios - Commercial panelboards and industrial loadcenters where reliable 3-phase protection is essential for equipment like motors, conveyors, and HVAC systems. - Main service distribution where a sturdy, bolt-on breaker ensures a solid, vibration-resistant connection to bus bars in demanding environments. - Retrofit or replacement projects in GE OEM panels, offering a direct, compatible upgrade path that maintains system integrity and protective coordination. Why this matters for your project - A 400A, 3-pole protection device is purposefully chosen when you need to safeguard multiple downstream breakers and feeders from simultaneous fault conditions, helping prevent cascading failures and equipment damage. - The bolt-on design reduces mounting strain and bus-bar movement, translating to more predictable performance in panels subject to vibration or mechanical activity. - The thermal-magnetic trip mechanism provides clear, dependable protection characteristics that align with standard electrical safety practices, helping facilities meet code requirements and maintain uptime. Practical guidance and considerations - Confirm panel compatibility with GE OEM panels to ensure seamless integration and coordination with existing protection devices. - Use proper installation procedures consistent with panelboard guidelines to maximize the long-term reliability of the bolt-on connection. - Consider the protection strategy for downstream loads (motor starters, feeders, and distribution circuits) to optimize selectivity and minimize unnecessary outages in fault conditions. With the General Electrics TKMA836400, you’re equipping a critical point in your electrical system with a rugged, precise, and durable solution. It’s the reliable choice for professionals who demand consistent performance, clear fault-clearing behavior, and straightforward integration within GE-based panel ecosystems.