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0455157001 - ESAB Thyristor for LAW Series Power Sources

Packaging: 1 per ea
$790.11/ea $476.79/1 per ea only $476.79/eaSave 40%

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OVERVIEW

Reliable Power Regulation for ESAB LAW Series Welders

The ESAB 0455157001 Thyristor is a critical internal component designed specifically for the maintenance and repair of ESAB's robust LAW series welding power sources. In the world of industrial welding, the consistency of the electrical arc is paramount to weld quality. Thyristor-controlled machines rely on these semiconductor devices to precisely regulate the output current, converting and controlling the power delivered to the workpiece. When a thyristor fails, the machine may exhibit symptoms ranging from an unstable arc and inability to control amperage to a complete loss of output.

This genuine OEM part is manufactured to the exact specifications required by ESAB engineering. Unlike generic electronic components that may not handle the specific thermal cycling and inductive loads of a welding circuit, the 0455157001 is built to endure. It serves as a key element in the rectifier bridge, working in unison with other components to provide the smooth DC output that professional fabricators expect from the LAW series. Whether you are troubleshooting a LAW 400, LAW 500, or similar vintage ESAB equipment, using authentic parts is the only way to guarantee the longevity of the repair.

Maintenance teams and repair technicians choose this specific thyristor to ensure that the machine's duty cycle and performance curves remain unaltered. Replacing faulty power electronics with the correct OEM part reduces the risk of cascading failures that can damage other expensive internal boards or transformers. Keep your heavy-duty welding operations running smoothly by choosing the correct replacement components for your fleet.

Key Applications

  • Rectifier Repair: Replacement of failed or open thyristors in the main power bridge.
  • Output Restoration: Fixing machines that have lost current regulation or maximum output capabilities.
  • Preventative Maintenance: Swapping out aging semiconductors during major overhauls of older power sources.
Additional Information
Packaging Description:1 Per Ea
Component Type:Power Semiconductor, Thyristor
Compatible Series:LAW 400, LAW 500, LAW Series
Application:Power Regulation, Rectification
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Component Type:Thyristor, Power Semiconductor
Compatible Series:LAW Series, LAW 400, LAW 500
Application:Power Regulation, Rectification
Brand:ESAB
Packaging Description:1 Per Ea

INCLUDED

  • 1 x ESAB Thyristor (0455157001)

APPLICATIONS

  • Repair of ESAB LAW 400 welding machines
  • Repair of ESAB LAW 500 welding machines
  • Replacement of faulty rectifier components
  • Industrial welding machine maintenance

FAQ

The thyristor acts as a controlled valve for electricity, rectifying AC to DC and regulating the amount of current sent to the welding arc based on your settings.

Common symptoms include an inability to adjust amperage, an erratic or stuttering arc, or zero output from the machine. A technician can verify failure using a multimeter to check for shorts or open circuits.

Yes, the 0455157001 is a genuine OEM replacement part manufactured by or for ESAB.

This thyristor is primarily designed for the ESAB LAW series of power sources (e.g., LAW 400, LAW 500). Check your machine's parts manual to confirm the part number.

Yes, thyristors generate significant heat. If it mounts to a heatsink, a thin layer of thermal compound is usually required to ensure proper heat transfer and prevent overheating.

While you can replace a single failed unit, it is often recommended to check all thyristors in the bridge. If they are aging, replacing them in matched sets can ensure balanced performance.

Electronic components are generally non-returnable once opened or installed due to the risk of damage from improper handling or external circuit faults.