Contact protected plug with screw connection for cables up to 2.5 mm², with onward connection capability (4 mm socket). Insulated by latching and sprung insulating sleeve, to be released by pressure on the lateral locking spring. Plug with contact spring, 4mm diameter.

For this typ up to DC 150 V, CAT II according IEC/EN 61010-31 item 6.4., comment 4 allowed for devices with not yet protected sockets.