This part is a kind of semiconductor called 2SC1740.

Function of this product has NPN Silicon Epitaxial Planar Transistor.

Manufacturers : CHINA BASE

Image and pinout :

Some of the text within the PDF file :

2SC1740 NPN Silicon Epitaxial Planar Transistor for switching and AF amplifier applications. The transistor is subdivided into four groups Q, R, S and E. according to its DC current gain. On special request, these transistors can be manufactured in different pin configurations. Absolute Maximum Ratings (Ta = 25℃) Parameter Collector Base Voltage Collector Emitter Voltage Emitter Base Voltage Collector Current Power Dissipation Junction Temperature Storage Temperature Range 1. Emitter 2. Collector 3. Base TO-92 Plastic Package Weight approx. 0.19g Symbol VCBO VCEO VEBO IC Ptot Tj TS Value 60 50 5 150 300 150 -55 to +150 Unit V V V mA mW OC OC Page 1 of 2 7/15/2011 Characteristics at Tamb=25 OC Parameter DC Current Gain at VCE=6V, IC=1mA Collector Base Breakdown Voltage at IC=50μA [ ... ]

2SC1740 PDF Datasheet Download