Continuous rating (male break) = 180 amps @ 12VDC intermittent rating (carrying current only) = 1800 amps @ 12vdc. 1 cycle = 4 seconds on/20 minutes off. Individually sealed contacts One piece die cast housing sealed with o-rings at base and mounting stem to keep moisture out. Two 1/2" copper alloy stud terminals with hex nuts and lock washers. overall length 4-3/8" diameter approx 2-5/8" mounting stem 3/4" diameter, 1/2 long, with 2 hex nuts and lock washer