This part is a kind of semiconductor called B989.

Function of this product has Silicon PNP Power Transistor.

Manufacturers : INCHANGE

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc Silicon PNP Power Transistor Product Specification 2SB989 DESCRIPTION ·Collector-Emitter Breakdown Voltage- : V(BR)CEO= -80V(Min) ·Collector Power Dissipation- : PC= 30W@ TC= 25℃ ·Low Collector Saturation Voltage- : VCE(sat)= -1.7V(Max)@ (IC= -3A, IB= -0.3A) ·Complement to Type 2SD1352 APPLICATIONS ·Designed for general purpose applications. ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT VCBO Collector-Base Voltage -80 V VCEO Collector-Emitter Voltage -80 V VEBO Emitter-Base Voltage -5 V IC Collector Current-Continuous -4 A IB Base Current-Continuous PC Collector Power Dissipation @TC=25℃ TJ Junction Temperature Tstg Storage Temperature -0.4 A 30 W 150 ℃ -55~150 ℃ isc website：www.iscsemi.cn 1 INCHANGE Sem [ ... ]

B989 PDF Datasheet Download