voltage doesn't matter for switches, will work the same with 6 or 12 - should be open on one set of contacts [the "off" side], dead short on the other [the "on" side], opposite when switched
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics