This part is a kind of semiconductor called 2SD400.

Function of this product has NPN Transistor.

Manufacturers : Yukuto

Image and pinout :

Some of the text within the PDF file :

YUKUTO SEMICONDUCTOR 2SD400 FEATURES Power dissipation PCM: 900 mW (TA=25℃) TRANSISTOR (NPN) Silicon Transistor TO-92MOD 1. EMITTER 2. COLLECTOR 3. BASE Collector current ICM: 1 A Collector-base voltage 25 V V(BR)CBO: Operating and storage junction temperature range TJ, Tstg: -55℃ to +150℃ ELECTRICAL CHARACTERISTICS (Tamb=25℃ unless otherwise specified) Parameter Collector-base breakdown voltage Collector-emitter breakdown voltage Emitter-base breakdown voltage Collector cut-off current Emitter cut-off current Symbol V(BR)CBO V(BR)CEO V(BR)EBO ICBO IEBO hFE(1) DC current gain hFE(2) Collector-emitter saturation voltage Base-emitter saturation voltage Transition frequency Output CapactIance VCE(sat) VBE(sat) VCE=2V, IC=1A IC=500mA, IB=50mA IC=500mA, IB=50mA VCE=10V, IC=50mA VCB= [ ... ]

2SD400 PDF Datasheet Download