This part is a kind of semiconductor called CJX2-1210.
Function of this product has AC contactor.
Manufacturers : Faryuan
Image and pinout :
Some of the text within the PDF file :
AC contactor CJX2-1201 CJX2-1810 CJX2-2510 CJX2-3210 CJX2-D5011 CJX2-D9511 CJX2 AC Contactor( including LC1-D contactor and LC1-F Contactor),it is suitable for using in the circuit up to the rated voltage 1000V AC 50/60 Hz,and three phase,rated voltage 380V,rated current up to 630A.to switch on and off the circuit at a distance.It is also used as unfrequent start,stop and reversal of AC motor,it is combined into the electromagnetic starter with the thermal relay,combined with the auxiliary contact block,air delayer&machine-interlocking devices,it becomes the delay contactor,mechanical interlocking contactor,star-delta starter,the contactor is produced according to the standard IEC60947-4-1,GB14048.4 Main technical parameter Control Power (kw) Rated Rated Model Rated heat working [ ... ]