10-6325 - Thermal Arc 10-6325 High Frequency Unit with Resistor

Technical Overview of the Thermal Arc 10-6325 HF Unit

The Thermal Arc 10-6325 is a specialized High Frequency (HF) Unit designed for use within compatible Thermal Arc Inverter Power Sources (IPS). This component is critical for the TIG welding process, specifically for generating the high-voltage, high-frequency spark required to ionize the air gap between the tungsten electrode and the workpiece. This ionization allows the welding arc to establish without the need for physical contact (scratch start) or a lift-arc mechanism, thereby preventing tungsten contamination and ensuring a clean weld start.

This assembly includes the HF module board along with a requisite resistor, ensuring the circuit operates within the correct electrical parameters. Failure of the HF unit typically results in the inability to start a TIG arc in HF mode, forcing the operator to rely on lift or scratch start methods if available, or rendering the machine unusable for critical applications. As an OEM replacement part manufactured under the ESAB/Thermal Arc brand umbrella, the 10-6325 ensures seamless integration with the machine's control logic and power topology.

Installation of this internal component involves accessing the high-voltage sections of the welding power source. It is strongly recommended that this part be installed by a certified welding equipment repair technician to ensure safety and proper calibration. The unit is built to withstand the thermal and electrical stresses common in industrial welding environments, restoring the power source to its original operational specifications.