Siemens LED Module, front plate mount, spring, blue, 24VADCProduct Overview The Siemens 3SU1401 1BB50 3AA0 is a blue LED module from the SIRIUS ACT series, designed for 22 mm panel mount control stations. It features an integrated LED light source rated for 24 V AC DC, with spring loaded terminals for secure wiring and front plate mounting, offering long service life and compact installation. Key Features Illuminated LED module, blue lens, from the SIRIUS ACT range Rated voltage: 24 V AC DC Front plate