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0191085104 - ESAB 400V Replacement Capacitor C4

Packaging: pack of 1
$19.75/EA $11.83/pack of 1 only $11.83/EASave 40%

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OVERVIEW

Get Your Rig Back Up and Running

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.

Why Choose OEM?

  • Perfect Fit: No hacking or modifying leads to make it fit the board.
  • Correct Rating: Handles the 400V spikes that occur during welding.
  • Reliability: Built to handle the heat and vibration of a working shop.
Additional Information
Brand:ESAB
Voltage:400 V
Packaging Description:1 Per Ea
Component Type:Capacitor
Schematic Reference:C4
Application:Power Source Repair

INCLUDED

  • 1 x ESAB 400V Capacitor (C4)

APPLICATIONS

  • Repair of ESAB welding power sources
  • Replacement of failed C4 circuit board components
  • Restoring arc stability in inverter welders
  • General industrial electronics maintenance for welding fleets

FAQ

C4 refers to the specific location reference on the welding machine's schematic diagram or printed circuit board (PCB). It identifies exactly which capacitor this part replaces.

Yes, this is a genuine OEM ESAB part, number 0191085104, ensuring guaranteed compatibility and performance.

Symptoms can include the machine failing to turn on, a humming noise without output, an unstable or erratic welding arc, or visible signs like bulging or leaking on the capacitor itself.

Installation involves working with high-voltage internal components. It is highly recommended that a qualified technician perform the repair, as capacitors can retain a dangerous charge even when the machine is unplugged.

This capacitor is rated for 400 Volts.

No, it is specific to models that use part number 0191085104 or reference C4 in their parts list. Please check your machine's spare parts manual.

OEM parts typically carry a warranty against manufacturing defects, but coverage may vary depending on installation. Contact customer support for specific warranty details.

Discharging requires a specific resistor tool to safely drain the energy. Never short the terminals with a screwdriver as this can cause arcing and injury. If unsure, consult a professional.