5662 - Bernard 5662 Standard Trigger Switch Replacement for MIG Guns

Restore Your MIG Gun's Performance

There is nothing more annoying than a MIG gun that won't fire when you pull the trigger. If you are wiggling the switch or squeezing it extra hard just to get an arc, it is time for a replacement. The Bernard 5662 Standard Trigger Switch is the go-to solution for fixing intermittent start issues on your Bernard MIG gun. Known for its distinct orange color and durability, this trigger is the standard replacement part for a huge range of guns, including the popular Q-Gun, S-Gun, and T-Gun models.

Welding gear takes a beating. Between the heat, the spatter, and the shop dust, it's no surprise that moving parts like triggers eventually wear out. The 5662 is built to handle the abuse, but when it finally gives up, swapping it out is one of the easiest repairs you can do yourself. You don't need to send your gun out for service. With just a screwdriver, you can open the handle case, disconnect the two lead wires, pop in the new 5662 switch, and close it back up. In less than ten minutes, your welder will feel brand new again, with that crisp, responsive click you expect.

This trigger is the "Standard" version, meaning it is a momentary switch—press to weld, release to stop. It is the configuration used by the vast majority of welders for general fabrication, auto body work, and structural repairs. It is designed to fit perfectly into the handle recess of Bernard-style guns, ensuring it doesn't rattle or stick. The connection points are standard slide-on terminals, so no soldering is required. It’s a plug-and-play repair that gets you back to laying beads immediately.

Don't let a cheap plastic part hold up your project. Whether you are a professional fabricator or a serious hobbyist running a Bernard setup, keeping a spare 5662 trigger in your toolbox is a smart move. It fits the legacy Q-Guns that have been around for decades, as well as the newer BTB series. If your gun handle says Bernard, chances are this is the part you need. Get reliable starts, consistent performance, and the peace of mind that comes with using the correct replacement part for your equipment.