The 3SU1400-1AA10-1FA0 is an illuminated pushbutton from Siemens' 3SU1 series, featuring a 30 mm mushroom head actuator with a spring-return mechanism. It integrates 1 NO (normally open) and 1 NC (normally closed) contact, rated for 10 A/250 V AC or 5 A/30 V DC, and includes a green LED indicator powered by 24 V DC.