DIN rails are the metal rails inside an electrical enclosure that are used to mount electrical equipment.
These electrical components require solid mechanical support to ensure that they remain in place and function correctly. However, they’re usually not designed to be mounted directly to a wall or to a panel of an electrical enclosure.

Some of the equipment types we can mounted on a DIN rail include:
VFD
Circuit Breakers
Terminal Blocks
Programmable logic controllers
Motor Controllers
Relays