2SA1972 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -400 V
• Collector-Base Voltage, max: -400 V
• Emitter-Base Voltage, max: -7 V
• Collector Current − Continuous, max: -0.5 A
• Collector Dissipation: 0.9 W
• DC Current Gain (h_fe): 140 to 450
• Transition Frequency, min: 35 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.Sometimes the "2S" prefix is not marked on the package - the 2SA1972 might only be marked "A1972".The PBHV9040T (SOT-23), PBHV9040X (SOT-89) and PBHV9040Z (SOT-223) is the SMD version of the 2SA1972 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.