This part is a kind of semiconductor called 5A8.

Function of this product has General Purpose Plastic Rectifier.

Manufacturers : SIYU

Image and pinout :

Some of the text within the PDF file :

www.DataSheet.co.kr SIYU R 普通塑封整流二极管 反向电压 50 --- 1000 V 正向电流 5.0A 特征 Features DO-27 5A05..5A10 General Purpose Plastic Rectifier Reverse Voltage 50 to 1000 V Forward Current 5.0 A ·反向漏电流低 .052(1.3) DIA .048(1.2) Low reverse leakage 1.0(25.4) MIN .375(9.5) .335(8.5) .220(5.6) DIA .197(5.0) 1.0(25.4) MIN ·正向浪涌承受能力较强 High forward surge capability ·高温焊接保证 High temperature soldering guaranteed: 260℃/10 秒, 0.375" (9.5mm)引线长度。 260℃/10 seconds, 0.375" (9.5mm) lead length, ·引线可承受5 磅 (2.3kg) 拉力。 5 lbs. (2.3kg) tension ·引线和管体皆符合RoHS标准 。 Lead and body according with RoHS standard 机械数据 Mechanical Data ·端子: 镀锡轴向引线 Terminals: P [ ... ]

5A8 PDF Datasheet Download