This part is a kind of semiconductor called MTL7707P.

Function of this product has BARRIER.

Manufacturers : MTL

Image and pinout :

Some of the text within the PDF file :

DIN rail mounting safety barriers MTL7700 SERIES ◆◆ Removable terminals ◆◆ Bussed power feed to other modules ◆◆ Relay and solid state switch modules ◆◆ Dual channel variants 6.3mm per channel Since its introduction in 1984 the MTL700 Series barrier has established itself as the worldwide standard for safety barriers. Known for its quality and reliability, the MTL700 Series is widely used in applications all over the world. www.net ◆◆ Proximity detector inputs ◆◆ Electronic fusing ◆◆ Direct replacement for MTL700 Series barriers ◆◆ Compatible terminal numbering and safety descriptions MTL7700 active modules are protected with an electronic fuse for the majority of applications. The MTL7798 active fused, power feed module can prot [ ... ]

MTL7707P PDF Datasheet Download