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0455157001 - ESAB Thyristor for LAW Series Power Sources

Packaging: 1 per ea
$790.11/ea $473.38/1 per ea only $473.38/eaSave 40%

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OVERVIEW

Genuine ESAB Replacement Thyristor for LAW Power Sources

Keep your classic ESAB welding machine operational with the ESAB 0455157001 Thyristor. This authentic replacement part is essential for owners of the ESAB LAW series welders who value the reliability and smooth arc characteristics of their equipment. The thyristor (also known as a Silicon Controlled Rectifier or SCR) acts as the gatekeeper for your welder's power, modulating the flow of electricity to give you precise control over your amperage settings. Over time, heat and electrical stress can cause these components to degrade or fail, leading to erratic welding performance or a "dead" machine.

Don't compromise the performance of your high-end industrial power source with mismatched generic electronics. The ESAB 0455157001 is engineered to fit perfectly into the rectifier assembly of compatible LAW models, ensuring correct mounting, heat dissipation, and electrical connection. Installing genuine ESAB parts means you don't have to worry about voltage ratings or trigger currents matching up—this part is the direct replacement intended by the manufacturer.

Whether you are a professional repair shop fixing a customer's unit or a fabricator maintaining your own shop equipment, this thyristor provides the solution to common power regulation issues. It restores the machine's ability to hold a steady arc, even under heavy loads. Investing in OEM repair parts extends the service life of your capital equipment, providing a cost-effective alternative to replacing the entire welding machine.

Features & Benefits

  • Direct Fit: Designed specifically for the physical and electrical layout of ESAB LAW series rectifiers.
  • Restored Performance: Brings back the smooth, controllable arc your machine had when new.
  • Durability: Constructed to handle the high-amperage demands of industrial welding.
  • Peace of Mind: Genuine ESAB quality ensures you won't be repeating the repair anytime soon.
Additional Information
Brand:ESAB
Packaging Description:1 Per Ea
Component Type:Thyristor, Power Semiconductor
Compatible Series:LAW Series, LAW 400, LAW 500
Application:Power Regulation, Rectification

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.