2SB985S Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -3 A
• Collector Dissipation: 1 W
• DC Current Gain (h_fe): 140 to 280
• Transition Frequency, min: 150 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92MOD

Here is an image showing the pin diagram of this transistor.The 2SB985S transistor can have a current gain of 140 to 280. The gain of the 2SB985 will be in the range from 100 to 560, for the 2SB985R it will be in the range from 100 to 200, for the 2SB985T it will be in the range from 200 to 400, for the 2SB985U it will be in the range from 280 to 560.Sometimes the "2S" prefix is not marked on the package - the 2SB985S might only be marked "B985S".The complementary NPN transistor to the 2SB985S is the 2SD1347S.The 2SB1123 (SOT-89), 2SB1123-S (SOT-89), 2SB1124 (SOT-89), 2SB1124-S (SOT-89) and BDP950 (SOT-223) is the SMD version of the 2SB985S transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SB985S with the 2SA1761.