2SC5658 / 2SC4617EB / 2SC4617E3 2SC4081UB / 2SC408.
2SC4617EB - General purpose small signal amplifier
2SC5658 / 2SC4617EB / 2SC4617E3 2SC4081UB / 2SC4081U3 / 2SC2412K General purpose small signal amplifier (50V, 150mA) Datasheet Parameter VCEO IC Va.