Canadian owned and operated
The ESAB 952251 is a heavy-duty electromechanical contactor kit designed for use in industrial welding power sources. This component is critical for the main power circuit, acting as a high-capacity relay that connects the power transformer to the output terminals or switches the input power line. The unit is configured as a 3-Pole (3P) device, allowing it to simultaneously switch three separate phases or lines, which is essential for three-phase welding machines. It carries a continuous current rating of 150 Amperes, making it robust enough for high-output MIG, TIG, and Stick welding applications.
The actuation of this contactor is controlled by a 115 VAC electromagnetic coil. When the welder's trigger is pulled (or the foot pedal depressed), the machine's control circuit sends 115 volts AC to the coil terminals. This energizes the magnet, pulling the armature in and closing the three main contacts to complete the circuit. The 115V coil specification is critical; installing a contactor with a different coil voltage (e.g., 24V or 230V) will result in non-operation or immediate coil burnout. Technicians should verify the control circuit voltage of the host machine before installation to ensure compatibility.
Contactors are wear items in welding machines. Over time, the high-current arcing that occurs during the making and breaking of the circuit causes the silver-alloy contact pads to pit and oxidize. Symptoms of a failing contactor include a loud buzzing or chattering noise (often due to debris in the magnet assembly or a failing coil), erratic welding output, or the machine failing to de-energize. The ESAB 952251 is designed with arc chutes and high-quality contact materials to minimize these effects, but eventual replacement is standard maintenance for high-uptime equipment. This kit provides a complete assembly for a direct swap, minimizing downtime.
Specifications:
| Additional Information |
|---|
| Brand:ESAB |
| Packaging Description:1 per each |
| Amperage Rating:150 A |
| Coil Voltage:115 VAC |
| Number Of Poles:3 |
| Product Type:Contactor Kit |
| Phase:3-Phase Compatible |
$350 Rebate
$350 Rebate
