This part is a kind of semiconductor called SBL2040.
Function of this product has SCHOTTKY BARRIER DIODE.
Manufacturers : Jilin Sino
Image and pinout :
Some of the text within the PDF file :
肖特基势垒二极管 R SCHOTTKY BARRIER DIODE SBL2040 主要参数 MAIN CHARACTERISTICS 封装 Package IF(AV) VRRM Tj VF(max) 20（2×10）A 40 V 150 ℃ 0.5V （@Tj=125℃） 用途 z 高频开关电源 z 低压续流电路和保护电 路 APPLICATIONS z High frequency switch power supply z Free wheeling diodes, polarity protection applications 产品特性 z共阴结构 z低功耗，高效率 z良好的高温特性 z有过压保护环，高可靠性 z环保（RoHS）产品 FEATURES zCommon cathode structure zLow power loss, high efficiency zHigh Operating Junction Temperature zGuard ring for overvoltage protection，High reliability zRoHS product TO-22O TO-22OHF TO-22OF 订货信息 ORDER MESSAGE 订货型号 印记 封装 Order codes Marking Package SBL2040Z SBL2040 [ ... ]