This part is a kind of semiconductor called CL01-12.
Function of this product has High Voltage Plastic Diode.
Manufacturers : Hio
Image and pinout :
Some of the text within the PDF file :
Hio H R CL01-12(12kV/350mA) Outline Drawings High Voltage Plastic Diode Reverse Voltage 12kV Forward Current 350mA Features Low VF High surge proof resistivity High reliability design 22 MIN Φ1.2±0.03 Φ7.5±0.5 22±0.5 Cathode Mark 22 MIN Unit mm Applications Rectification for Microwave oven high voltage power supply Cathode Mark Type CL01-12 Mark Maximum Ratings and Characteristics Absolute Maximum Ratings Item Repetitive Peak Rerverse Voltage Average Output Current Non-repetitive Surge Current Junction Temperature Allowable Operation Case Temperature Storage Temperature Symbols VRRM IF(AV) IFSM Tj Ta Tstg Conditions CL01-12 12 Unit kV mA A 50HzSine half-wave average value.Ta≤60 50HzSine half-wave peak value.one-shot Ta=25 350 30 130 130 -40 t [ ... ]