Switching power supply (Transformer) in DIN rail format.
It is powered by connection directly to the alternating current (AC 100/240 V) and provides continuous DC power 12 V 1,25 A. It has an output. Voltage range 10,8 V ~ 13,2 V and efficiency of 84 %.
A DIN rail is a standard sized metal rail 35mm wide with a section similar to a hat - know as a top hat rail (EN 50022 – 35 × 7.5). It is widely used for mounting electrical elements of protection and control, both in industrial applications and in homes.