Electro PJP Jack, Plugs & Sockets Safety jack socket 619020 - PJP 3266-C-CD1-J, The Electro PJP 3266-C-CD1-J is a safety jack socket designed with a 4 mm pin diameter in a yellow casing. This laboratory connector is ideal for creating secure and reliable electrical connections. Typically used in laboratory and testing environments, it ensures safe and efficient operation. Electro PJP 3266-C-CD1-J Safety Jack Socket Yellow 4mm 1000V CATIII 36A