Tsc-407 Datasheet
This version is a panel-mounted switch often used for selecting modes or functions in industrial equipment 4-Position Rotary Switch Actuator Type: Shorting (Make-before-break) Contact Rating: 125VAC at 6A or 28VDC at 6A Durability: 10,000 mechanical cycles; 5,000 electrical cycles Operating Temp: Package/Dimensions: Panel mount with solder lug terminals; approx. 28mm x 32mm Other Possible "407" Components
And he would never, ever turn the voltage past 4.2V again. tsc-407 datasheet