Type 13.91 is a quiet electronic step relay and timing step relay (fixed 10 minutes) with 1 NO (SPST-NO), for 230 V AC working and mounting within a residential switch box

Feature include:

Use with 3 or 4 wire connection, with automatic recognition by the relay
Control input can be continuously applied
Longer mechanical and electrical life, and much quieter than electromechanical step relays
“Zero crossing” load switching
Can be mounted behind blanking plates, as widely used in residential wiring systems such as; BTicino: Axolute, Matix, Living and Magic, Gewiss: GW24, Vimar: Plana and Idea
Cadmium-free contact material