This part is a kind of semiconductor called 2SC1740.

Function of this product has Silicon NPN transistor.

Manufacturers : BLUE ROCKET ELECTRONICS

Image and pinout :

Some of the text within the PDF file :

2SC1740 Rev.E Mar.-2016 DATA SHEET 描述 / Descriptions TO-92 塑封封装 NPN 半导体三极管。Silicon NPN transistor in a TO-92 Plastic Package. 特征 / Features 共基极输出电容小,与 2SA933A 互补。 Small base output capacitance, complementary pair with 2SA933A. 用途 / Applications 用于一般放大。 General purpose amplifier. 内部等效电路 / Equivalent Circuit 引脚排列 / Pinning 1 23 PIN1：Base PIN 2：Collector PIN 3：Emitter 放大及印章代码 / hFE Classifications & Marking hFE Classifications Symbol hFE Range Q 120~270 R 180~390 S 270~560 http://www.fsbrec.com 1/6 2SC1740 Rev.E Mar.-2016 DATA SHEET 极限参数 / Absolute Maximum Ratings(Ta=25℃) 参数 Parameter Collector to Base Voltage Collector to Emitter Voltage Emitter [ ... ]

2SC1740 PDF Datasheet Download