213361 - Miller 213361 High Frequency Litz Transformer with Boost

Genuine Miller 213361 High Frequency Transformer

The Miller 213361 XFMR, HF Litz/Litz w/Boost is a critical internal component designed for specific Miller welding power sources. As a genuine Original Equipment Manufacturer (OEM) part, it is engineered to meet the exact electrical and physical specifications of your machine, ensuring a seamless installation and reliable performance. When a high-frequency transformer fails, it can lead to issues with arc starting, arc stability, or complete loss of high-frequency functionality, which is essential for processes like TIG welding and plasma cutting.

This transformer is distinguished by its construction using Litz wire. Litz wire consists of many thin wire strands, individually insulated and twisted or woven together. This specialized design is used to reduce the skin effect and proximity effect losses in conductors used at frequencies up to about 1 MHz. In the context of a welding machine, this ensures that the high-frequency current required for non-contact arc starting is transmitted efficiently without excessive heat buildup or energy loss. The "w/Boost" designation indicates that this unit includes circuitry or winding configurations designed to provide an extra boost to the voltage or current, ensuring reliable ignition even in challenging conditions or with longer torch leads.

Maintaining your welding equipment with authentic Miller parts is vital for longevity and safety. Generic or aftermarket transformers may not match the precise impedance and inductance values required by the control boards in Miller machines, potentially leading to further damage or suboptimal welding characteristics. The Miller 213361 is built to withstand the harsh industrial environments typical of welding shops, including resistance to vibration, thermal cycling, and electrical noise.

Whether you are a professional repair technician or a facility maintenance manager, choosing the Miller 213361 ensures that your equipment is restored to its original factory capabilities. This part is typically found in the high-frequency start circuit of TIG welders, where it generates the high-voltage spark needed to ionize the air gap between the tungsten electrode and the workpiece, allowing the welding arc to establish without touching the metal. It may also be utilized in plasma cutting systems for pilot arc initiation.

Key Benefits:

• OEM Quality: Guaranteed fit and function for Miller equipment.


• Efficient Design: Litz wire construction reduces high-frequency losses.


• Reliable Starting: Integrated boost function aids in consistent arc ignition.


• Durability: Designed to handle the rigors of industrial welding cycles.