1971920-1 is a SOLARLOK PV4-PM socket-female connector kit designed for panel mount solar applications. This connector is rated for 1000V DC (UL and TUV/IEC) and supports current ratings of UL 15A/TÜV 25A at 2.5mm², UL 20A/TÜV 35A at 4.0mm², and UL 30A/TÜV 40A at 6.0mm². The connector features a contact resistance of 0.35mO and provides IP68 waterproof protection rated for 1m/24 hours. With a PC housing and tinned copper contacts, it is commonly used in solar inverters, combiner boxes, micro inverters, and DC optimizers where reliable power connections are essential.