Siemens Integrated LED module, spring, green, 24VAC/DCProduct Overview The Siemens 3SU1401 2BB40 3AA0 is an LED illuminating unit from the SIRIUS ACT 3SU14 series, designed for 22 mm operator devices. This module provides bright green LED illumination and is intended for use with pushbuttons, indicator devices, and signalling elements. With a wide 24230 V AC DC input range, it offers exceptional flexibility for integration into various industrial control panels and machine interfaces. Its durable design