Lg 4.000 in. Max; wth 2.000 in. Max; tk 1.200 in. Max; type of control, on/off; 80v transient protection; m60ov tran protection; volt range 18 to 32 vdc; op temp m53 c to 74 c; over temp shut off 30 degrees p/m 5 degrees c; short sensor shut off m70 degrees c; sensor op power at 600 chm: 20 mw at 28 vdc; controller op power at 28v DC , 2 watts plus load