This part is a kind of semiconductor called 3TF30.
Function of this product has AC Contactors.
Manufacturers : Siemens
Image and pinout :
Some of the text within the PDF file :
Contactor Instructions 3TF30, 3TF31 DIN VDE 0660, IEC 60947 Order No.: 3ZX1012>0TF00>1AA2 ! Limited protection against contact with live parts Degree of protection IP 20 to IEC 60529 Safe from finger touch to DIN VDE 0106, Part 100 Commissioning and maintenance by qualified personnel only. Follow the operating instructions. Cleaning Remove dust by suction. Auxiliary contact block For replacement see Fig. V. WARNING: HAZARDOUS VOLTAGE CAN CAUSE ELECTRICAL SHOCK AND BURNS. DISCONNECT POWER BEFORE PROCEEDING WITH ANY WORK ON THIS EQUIPMENT. Installation For dimension drawings (dimensions in mm) see > Fig. I a > Fig. I b a.c. operated d.c. operated 1) Minimum clearances from earthed parts Snap onto 35 mm standard mounting rail to DIN EN 50 022 or fix on a plain surface with two M4 scr [ ... ]