The TM240 thermal-magnetic trip unit provides adjustable overload protection from 11 A to 16 A and short-circuit protection set at 10 to 20 times the rated current In=16 A.
The 3VA1 frame mounts on a DIN rail in the standard panel footprint. The nut keeper kit included with this variant is specifically for DC Power OEM applications in China, so verify that the captive hardware matches your enclosure's gland plate or busbar arrangement before panel integration.
The ATAM designation indicates an adjustable thermal and magnetic trip module, giving the commissioning engineer field flexibility to dial in the overload setting between 11 A and 16 A and the magnetic short-circuit pickup between 10 x In and 20 x In without swapping trip units. That range covers motor starting inrush for small pumps and conveyors while still providing fault protection.