This part is a kind of semiconductor called T2KB80.

Function of this product has Bridge Rectifier.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

T2KB(20~80) 橋式整流器 Bridge Rectifier ■特徵 Features ● Io 2.0A ● VRRM 200V~800V ● 玻璃鈍化芯片 Glas s passivated chip ● 耐正向浪湧電流能力高 High surge forward current capability ● 小型化 Small size ■用途 Applications ● 作一般電源單相橋式整流用 General purpose 1 phase Bridge rectifier applications ■外形尺寸和印記 Outline Dimensions and Mark 單位Unit：mm 型號、電壓等級(例) Type 、Class(example) 2.5×45° 141.45.5±±0.02.2 T2KB60 930 批號(例) Date Code(example) 3.5±0.1 5.0±0.1 11..0±0.2 + ~ ~－ 1.25±0.1 1.3±0.1 0.7±0.1 1.0±0.1 0.5±0.02 2.2 14.5±0.5 4±0.1 4±0.1 4±0.1 ■極限值（絕對最大額定值） Limiting Values（Absolute Maximum Rating） 參數名稱 Item 符號 [ ... ]

T2KB80 PDF Datasheet Download