
When your welder starts acting up—maybe the arc is stuttering, the machine won't power up fully, or you've seen that tell-tale puff of smoke—it's often a blown capacitor to blame. The ESAB Capacitor 400V (C4) (Part #0191085104) is the exact replacement you need to fix specific ESAB power sources. We know that in the shop or out in the field, downtime is money. You don't have time to mess around with generic electronic parts that might not fit or, worse, might blow up the minute you strike an arc.
This is a genuine OEM part, meaning it's the exact same component that was in your machine when it rolled off the assembly line. It is rated for 400 Volts and is designated as C4 on your machine's circuit board or parts diagram. Capacitors are the lungs of your inverter's power supply; they smooth out the voltage to give you that buttery smooth arc ESAB is known for. If your old cap is bulging, leaking fluid, or testing bad, swapping it out with this unit is the standard fix to restore full power.
Safety Note: Replacing internal machine parts like capacitors involves high voltage. Even when unplugged, capacitors can hold a lethal charge. Always ensure the machine is disconnected from power and the capacitors are properly discharged before attempting any repairs. If you aren't comfortable digging into the guts of your welder, this is the part you hand to your repair tech to ensure the job is done right.
| Additional Information |
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| Brand:ESAB |
| Voltage:400 V |
| Packaging Description:1 Per Ea |
| Component Type:Capacitor |
| Schematic Reference:C4 |
| Application:Power Source Repair |