CX420-3545 - 400A Tweco Style MIG Gun with 20ft Cable and Euro Connector

Heavy-Duty 400 Amp MIG Welding Gun

The CX420-3545 is a premium aftermarket MIG gun designed to meet the rigorous demands of industrial fabrication and heavy manufacturing. Rated at 400 Amps, this air-cooled torch is engineered to handle high-deposition welding processes using flux-cored or solid wires. It is an ideal replacement or upgrade for welders requiring a robust tool that can withstand the heat and physical abuse of a busy shop floor.

Extended Reach and Versatility

One of the standout features of this model is its 20-foot (6.1-meter) cable assembly. Standard MIG guns often come in 10 or 15-foot lengths, which can be limiting when working on large trailers, structural beams, or agricultural equipment. The extra length provided by the CX420-3545 allows the operator to move freely around the workpiece without constantly repositioning the heavy wire feeder or power source. This improves workflow efficiency and safety by reducing cable clutter and machine movement.

Universal Compatibility

Equipped with a standard Euro backend connection, this MIG gun offers plug-and-play compatibility with a vast array of welding machines. The Euro connector is a quick-disconnect system that houses power, gas, and trigger signals in a single robust interface. This makes it compatible with many machines from brands like ESAB, Miller (with adapters), Lincoln (with adapters), and many European-style power sources. The gun comes pre-configured for 0.035" to 0.045" wire diameters, covering the most common industrial wire sizes.

Cost-Effective Maintenance

Maintenance is simplified through the use of standard Tweco-style consumables. The gun utilizes the widely available 14-series contact tips, 24-series gas nozzles, and 54-series gas diffusers. These parts are stocked by virtually every welding supply distributor, ensuring that you never experience downtime waiting for proprietary components. The front-end design is proven to provide excellent gas coverage and electrical conductivity, resulting in stable arcs and high-quality welds.