673502 - ESAB 3-Pole 75A Welding Contactor 115V Coil

Restore Reliable Power to Your Welder

If your welding machine is humming but not welding, or if the arc refuses to strike despite the machine being turned on, a faulty contactor could be the culprit. The ESAB 673502 Contactor is the heavy-duty switch that acts as the gatekeeper for your welder's power. When you pull the trigger on your MIG gun or hit the foot pedal on your TIG setup, this contactor slams shut to deliver the massive electrical current needed to melt metal. Over time, the internal contacts can get burnt, pitted, or even welded shut, leading to erratic performance or a machine that won't turn off.

This replacement unit is rated for 75 Amps and features a 3-pole design, meaning it handles the three distinct power lines found in powerful industrial welders. The 115-volt coil is the "trigger" part of the switch, compatible with the standard control power found in most shop environments. Installing a genuine or high-specification replacement like the ESAB 673502 ensures that your machine can handle the heat and stress of daily fabrication work without skipping a beat. A weak contactor can cause voltage drops that lead to poor weld quality, porosity, or cold starts.

Don't let a small electrical part stop your production line. Replacing a worn contactor is often a straightforward repair that can add years of life to an older welding power source. This unit is designed to fit perfectly into compatible ESAB machines, ensuring that mounting holes and wire connections line up for a hassle-free installation. Whether you are troubleshooting a breakdown or performing preventative maintenance on your fleet, this 75A contactor provides the durability and reliability professional welders demand.

Common Signs of Failure

• Loud buzzing or chattering noise from inside the machine.
• The machine powers on, but there is no output at the torch.
• The arc stays on even after you release the trigger (contacts welded shut).
• Visible flashing inside the machine case when triggering.