0349307633 - ESAB CI50 Replacement Contactor 42V Coil

Technical Overview of the ESAB CI50 Contactor

The ESAB CI50 Contactor (Part Number: 0349307633) is a specialized electromechanical component designed for the precise control of power circuits within ESAB welding equipment. Operating with a coil voltage of 42V and compatible with both 50Hz and 60Hz frequencies, this contactor serves as a critical switching mechanism. It is engineered to handle the rigorous demands of industrial welding environments, ensuring reliable make-and-break operations for the main power or auxiliary circuits of the welding power source.

As an OEM replacement part, the CI50 ensures seamless integration with existing ESAB circuitry, maintaining the manufacturer's safety and performance standards. The 42V control voltage is standard for many safety-critical control loops in welding machinery, isolating the operator controls from high-voltage mains. Technicians replacing a faulty contactor should verify the coil voltage and frequency ratings match the original component to prevent coil burnout or chatter.

Failure of a main contactor can result in the machine failing to strike an arc, sticking electrodes, or complete loss of output. Replacing a worn or fused contactor with this genuine ESAB unit restores the machine's ability to modulate power output effectively. The unit is built with high-quality contact materials to resist arcing and pitting, extending the service life of the repair and ensuring the equipment meets original factory specifications.