The SMP21-L20-DC24V-20A is a primary pulsed switched mode power supply (SMPS) for DIN rail mounting with PCB screw terminals and integral active power factor correction (PFC). It accepts a wide input voltage range from AC 90 to 264 V and delivers a regulated DC 24 V SELV output at 20 A continuous current, with a typical efficiency of 90% and effective output power of 480 W. The unit features selectable parallel mode operation for performance improvement, operates at a switching frequency of 60 kHz, and includes integral overvoltage protection via varistor and internal blade fuse protection. Typical applications include process control, industrial switch and control gear, machine construction, and telecommunication systems, where reliable, regulated DC power with high efficiency and wide input tolerance is required.