The Siemens 3RT1916-2ED31 is a SIRIUS-brand auxiliary switch with an adjustable ON-delay function. It clips onto a contactor or relay base, adding a time-delayed auxiliary contact to the switching logic. The delay is field-adjustable from 5 to 100 seconds, with a recovery time of 150 ms between cycles. The switching element is rated for 1 A at 24 V, 0.2 A at 125 V, and 0.1 A at 250 V — typical signal-level loads for a PLC input or pilot lamp, not motor currents.
The terminals accept 18-14 AWG solid or stranded wire and are rated IP20 — safe for finger-probe access inside an enclosed panel. Mounting position is unrestricted, and the basic insulation with pollution degree 3 suits standard industrial control cabinets. The device is compliant with EN 61000-6-2 for industrial EMC environments.