Eaton A200M3CX NEMA Size 1 Motor Starter

The Eaton A200M3CX is a NEMA Size 1 non‑reversing motor starter designed for across‑the‑line starting of three‑phase AC induction motors. It integrates an A200 magnetic contactor with a melting alloy overload relay in a compact, open‑style package suitable for mounting in motor control centers (MCCs) or individual enclosures. This starter provides reliable motor control and overload protection for industrial applications.

Key Features

• NEMA Size 1, non‑reversing configuration

• Contact rating: 27 A continuous, 600 VAC maximum

• Horsepower ratings: 7.5 HP @ 230V, 10 HP @ 460V, 10 HP @ 575V (three‑phase)

• Melting alloy overload relay with adjustable trip class (10, 20, or 30 depending on heater selection)

• Interchangeable heater elements for precise motor FLA matching

• Manual reset with automatic reset option (field convertible)

• Coil voltage: 120 VAC 60 Hz (other voltages available by code)

• 1 N.O. + 1 N.C. auxiliary contact built‑in

Technical Specifications

Construction

The A200 contactor features double‑break silver alloy contacts for long life and reliable switching. The magnet system is AC‑operated with a laminated silicon steel core and shaded coil for quiet operation. The overload relay uses a eutectic alloy ratchet mechanism that provides accurate, ambient‑sensitive protection against running overloads. It also offers single‑phase sensitivity. The entire assembly is mounted on a rugged base with clearly marked terminals.

Typical Applications

• Individual motor control for pumps, fans, conveyors

• Packaged equipment such as compressors and machine tools

• Replacement for aging NEMA starters in existing panels

• HVAC systems and agricultural machinery

Heater Selection and Protection

Proper motor protection requires selecting the correct heater elements based on the motor nameplate full‑load current (FLA). Heater packs are ordered separately and are available for a wide range of currents. The overload relay trips when the motor current exceeds the heater rating for a time inversely proportional to the current. The relay can be manually reset after a trip, and a trip indicator shows the overload condition.

Compliance

The A200M3CX meets applicable NEMA ICS 2, UL 508, and CSA C22.2 No. 14 standards. It is UL listed and CSA certified for industrial control equipment.

The Eaton A200M3CX motor starter combines time‑proven design with reliable protection, making it a trusted choice for controlling single‑speed three‑phase motors in demanding environments.