This part is a kind of semiconductor called 2SD400.

Function of this product has SILICON NPN TRANSISTOR.

Manufacturers : LZG

Image and pinout :

Some of the text within the PDF file :

2SD400 TO-92MOD Transistor (NPN) 1 1. EMITTER 2 3 2. COLLECTOR 3. BASE Features — Low-Frequency power Amp, Electronic Governor Applications TO-92MOD 5.800 6.200 0.400 0.600 0.900 1.100 8.400 8.800 13.800 14.200 MAXIMUM RATINGS (TA=25℃ unless otherwise noted) Symbol VCBO VCEO VEBO IC PC TJ Tstg Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current -Continuous Collector Power Dissipation Junction Temperature Storage Temperature Value 25 25 5 1 0.9 150 -55-150 Units V V V A W ℃ ℃ 0.000 0.380 1.500 TYP 2.900 3.100 1.600 0.400 4.700 0.500 5.100 4.000 1.730 2.030 Dimensions in inches and (millimeters) ELECTRICAL CHARACTERISTICS (Tamb=25℃ unless otherwise specified) Parameter Collector-base breakdown voltage Collector-emitter [ ... ]

2SD400 PDF Datasheet Download