This part is a kind of semiconductor called XL1225.

Function of this product has Thyristor.

Manufacturers : BLUE ROCKET ELECTRONICS

Image and pinout :

Some of the text within the PDF file :

XL1225 Rev.E Mar.-2016 描述 / Descriptions TO-92 塑封封装单向可控硅。Thyristor in a TO-92 Plastic Package. 特征 / Features 低成本，高容量。 Intended for low cost high volume applications. 用途 / Applications 应用于高压控制电路。 Applied to high Voltage control circuit. 内部等效电路 / Equivalent Circuit DATA SHEET 引脚排列 / Pinning 123 PIN1：Anode PIN 2：Gate PIN 3：Cathode 放大及印章代码 / hFE Classifications & Marking 见印章说明。See Marking Instructions. http://www.fsbrec.com 1/6 XL1225 Rev.E Mar.-2016 DATA SHEET 极限参数 / Absolute Maximum Ratings(Ta=25℃) 参数 Parameter Repetitive peak off-state voltages RMS on-state current Average on-state current Peak Reverse Gate Voltage Peak gate current Peak gate po [ ... ]

XL1225 PDF Datasheet Download