This part is a kind of semiconductor called 2CL3512.

Function of this product has High Voltage Diodes.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

2CL3509、2CL3512 微波爐用高壓二極管 High Voltage Diodes for Micro-wave Oven ■特徵 Features ● IF（AV） 350mA ● VRRM 9kV，12kV ● 高可靠性 High reliability ■外形尺寸和印記 Outline Dimensions and Mark 單位 Unit：mm 代號、批號 Code、Lot No. φ7.5±0.5 φ1.2±0.03 負極標誌 Cathode Mark ■用途 Applications ● 微波爐及其他電子設備高壓電源整流用 Rectification for high voltage power supply of magnetron in Micro wave oven and others 22min 22±0.5 22min . 型號 Type 2CL3509 2CL3512 代號 Code T3509 T3512 負極標誌 Cathode Mark .■極限值（絕對最大額定值） Limiting Values（Absolute Maximum Rating） 參數名稱 Item 反向重復峰值電壓 Repetitive Peak Reverse Voltage 正向平均電流 Average For [ ... ]

2CL3512 PDF Datasheet Download