The Siemens 3RT1916-4KA5 is a soldering pin adapter set designed for 3RT101.1 contactors that carry an integrated auxiliary contact. Each set contains two adapters — enough for one contactor — with 3.8 mm long soldering pins intended for PCB or terminal-block mounting.
This part is listed as a phased-out product. The official successor is the SIRIUS 3RT2 series.
Deployment Context
These adapters mount onto the contactor's auxiliary contact block, converting the wiring interface to solder pins for direct PCB or terminal-block integration inside a control panel.