Siemens LOGO!POWER Switched Mode DIN Rail Power Supply, 100 → 240V ac, 12V dc dc Output, 1.9A Output, 23W

Use this Siemens switch-mode DIN rail power supply to operate your industrial equipment in the event of power outages. It provides emergency power to a load when the input source or mains fail. You can easily install the miniature and compact unit in tight spaces like small enclosures thanks to compact dimensions of 36 (W) x 90 (H) x 53mm (D) and a light weight of 120g. It's a flexible device that converts a wide-range input from 100V to 240V for single-phase supply systems and for DC (direct current) power networks, so you can use it with applications such as industrial process control devices and emergency equipment in hospitals.

• Up to 90% efficiency over the entire power range prolongs the lifespan of the device and linked components
• IP20 (ingress protection) rating means it's touch-proof to prevent electrical shocks and shielded against dust entry to prevent corrosive damage

No, this Siemens miniature power supply is convection cooled so you don't have to install additional cooling fans. It's also safe to mount other power supplies or devices next to it without risk of it overheating.