What It Connects
The 3RV1918-5AA00-0FJ0: This solder pin connection is designed for the main contact terminals of Siemens 3RV2 series motor starter protectors, specifically the M3/12 screw size. It replaces or supplements the standard screw-clamp connection where a solder pin is preferred for permanent, vibration-resistant wiring — common in panel builds where the contactor is wired to a busbar or a fixed terminal block rather than field-terminated cables.