1394738-4 is a SOLARLOK cable coupler connector kit designed for photovoltaic (PV) system interconnection applications. This connector features a minus (negative) keying configuration and is compatible with 4.0 mm² (12 AWG) wire size, with a cable outer diameter range of 5.5-8.0 mm. The kit includes an O-ring and metal nut with screw-machined silver-plated contacts, providing IP 67 protection when mated and withstanding voltage up to 1000 V DC with current rating up to 25 A. Operating over a temperature range of -40°C to +105°C, this TÜV-approved connector is ideal for serial interconnection in solar panel junction boxes and DC/AC converter connections.