Siemens 3SU1001-6AA40-0AA0 — SIRIUS ACT 22 mm command and signalling device. Panel-mount pushbutton, indicator lamp or emergency-stop actuator in the 22 mm cutout family. SIRIUS 3SU1 pilot light, red 22mm, LED 24V AC/DC. Alarm indication standard. Installed in low-voltage switchgear panels, main and sub-distribution boards, motor control centres and DIN-rail consumer units.