0558010710 - ESAB 3-Pole 90A Contactor with 24V Coil

Get Your Machine Back Up and Running

Is your welder acting up? If you are pulling the trigger and hearing a click but getting no arc, or worse—if your wire is live the moment you turn the machine on without even touching the trigger—you might be dealing with a bad contactor. The ESAB 0558010710 is a heavy-duty replacement contactor designed to get your ESAB power source back in the fight. This isn't just a small relay; it's a beefy 90-amp, 3-pole switch that handles the heavy lifting of your machine's power input or output.

Think of the contactor as the muscle behind your trigger finger. When you signal the machine to weld, this unit slams shut to let the power flow. Over time, the thousands of arcs you strike can cause the internal contacts to burn, pit, or even weld themselves together. A contactor that is stuck closed is a major safety hazard, while one that won't close means no work gets done. Swapping out your old, tired unit for this fresh 90A replacement ensures that when you want power, you get it, and when you stop, the arc stops instantly.

This specific model features a 24-volt AC coil, which is the part that receives the signal from your gun trigger. It is built with 3 poles, meaning it can switch three separate lines of power simultaneously, which is typical for 3-phase industrial machines or heavy-duty single-phase setups. It is designed as a direct replacement for part number 0558010710, so you don't have to worry about retrofitting or drilling new holes. It drops right in where the old one came out.

Don't let a cheap electrical part cost you a day's worth of billing. Keep your machine running smooth and safe. If you are noticing a loud buzzing sound coming from inside the welder, or if the arc start has become erratic, check your contactor. If it looks charred or fails a continuity test, this ESAB 0558010710 is exactly what you need to fix the problem. Installation is straightforward for those familiar with machine repair—just remember to tag your wires before you take the old one off!