Eaton 140D316G04 800A 3-Pole Circuit Breaker

Eaton 140D316G04 is a rugged, high-capacity three-pole circuit breaker designed to protect large, three‑phase electrical systems. With a current rating of 800 A, this breaker delivers reliable overcurrent protection for heavy loads while helping to keep motors, feeders, and connected equipment safe from faults and insulation damage.

• 800 A current rating provides strong protection for main feeders and high‑demand equipment in industrial and commercial settings.
• 3-pole design ensures synchronized tripping across all three phases, maintaining balanced protection for three‑phase motors, pumps, and conveyors.
• Part number 140D316G04 guarantees precise compatibility with Eaton panelboards and enclosures that support this family of breakers.
• Engineered and manufactured by Eaton, offering dependable performance and long-term reliability in demanding environments.
• Clear identification and traceability simplify maintenance planning and inventory management for facilities with extensive Eaton-based electrical architecture.

Where it shines is in applications that demand robust, uninterrupted protection for high‑current three‑phase circuits. Think data centers with power distribution needs, manufacturing lines with heavy motors, large HVAC systems, and industrial plants where every phase must trip together to prevent damage and fires.

Why choose this breaker over alternatives comes down to seamless compatibility within Eaton ecosystems, proven trip performance, and the confidence of using a unit designed for big loads. It acts as a reliable main disconnect or critical feeder, reducing the risk of nuisance trips on individual phases and helping maintain safe, continuous operation of essential equipment.

Practical installation notes — confirm that your panelboard accepts the 140D316G04, then follow Eaton’s installation guidelines for mounting, bus connections, and protective clearances. Proper installation ensures accurate trip protection, compliance with safety standards, and predictable electrical behavior under fault conditions.