Cal Test CT3151 is a UL recognized 4 mm Safety Banana Jack (socket) center line .492" (12.5mm) above PCB surface, accepts sheathed or shrouded banana plugs and meets international safety standards. Component recognition per UL 61010-1 and CAN/CSA C22.2 No. 61010-1 to 1,000 V CAT III, 25 A. Designed for horizontal printed circuit mounting from the rear of the panel.