This is one of the transistor types.
Part Number : A1668, 2SA1668
Function : Silicon PNP Epitaxial Planar Transistor
Package : TO220F Type
Manufactures : Sanken
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Description
1. Complement to type 2SC4382
2. Collector to Base Voltage : VCBO = -200V
3. Collector to Emitter Voltage : VCEO = -200V
4. Emitter to Base Voltage : VEBO = -6V
5. Collector Current : IC = -2A
6. Base Current : IB = -1A
7. Total Dissipation : PC = 25W
Application : TV Vertical Output, Audio Output Driver and General Purpose
Pinout