20402098 - Tweco 2040-2098 Trigger Switch Assembly for No. 4/5/6 MIG Guns

Reliable Trigger Replacement for Professional MIG Guns

The Tweco® Trigger Switch Assembly (Part No. 2040-2098) is an essential maintenance component designed to restore the operational integrity of legacy Tweco® Professional MIG guns. Engineered specifically for the No. 4, No. 5, and No. 6 series, this assembly ensures seamless compatibility and reliable performance in industrial welding environments. Over time, the mechanical and electrical components of a trigger can degrade due to constant cycling, exposure to workshop dust, and thermal stress. A failing trigger often results in intermittent arc initiation or complete loss of control, leading to costly downtime and potential weld defects.

This OEM assembly is rated for a broad amperage range of 200 A to 450 A, making it suitable for medium to heavy-duty fabrication tasks. It is designed to handle the electrical demands of air-cooled systems while providing a consistent mechanical action that welders rely on for precision work. The switch accommodates MIG wire sizes ranging from 0.023 inches to 0.062 inches, covering the vast majority of standard welding applications. By replacing a worn switch with this genuine Tweco part, facilities can extend the service life of their existing MIG guns without the expense of purchasing entirely new torch assemblies.

Installation is straightforward, as the component is molded to fit the specific internal geometry of the Tweco handle. This ensures that the trigger remains securely in place during operation and maintains the correct ergonomic feel. Whether for maintenance repair and operations (MRO) or stocking critical spares, the Tweco 2040-2098 Trigger Switch Assembly provides the durability and quality assurance required for professional welding operations.