This part is a kind of semiconductor called B0540W.

Function of this product has Silicon Diode.

Manufacturers : BLUE ROCKET ELECTRONICS

Image and pinout :

Some of the text within the PDF file :

B0530W-B0540W Rev.F Mar.-2016 描述 / Descriptions SOD-123 塑封封装 硅半导体二极管。 Silicon Diode in a SOD-123 Plastic Package. 特征 / Features 低正向压降、用于瞬态保护的保护环结构。 Low forward voltage drop, Guard ring construction for transient Protection. 用途 / Applications 半导体二极管. Silicon diode. 内部等效电路 / Equivalent Circuit DATA SHEET 引脚排列 / Pinning 1 2 PIN1:Cathode PIN2:Anode 放大及印章代码 / hFE Classifications & Marking Model Marking B0530W HSE B0540W HSF http://www.fsbrec.com 1/6 B0530W-B0540W Rev.F Mar.-2016 DATA SHEET 极限参数 / Absolute Maximum Ratings(Ta=25℃) 参数 Parameter Peak Repetitive Reverse Voltage Working Peak Reverse Voltage DC Reverse Voltage RMS Reverse Voltage Non-Re [ ... ]

B0540W PDF Datasheet Download