2SC1621 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 20 V
• Collector-Base Voltage, max: 40 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.2 A
• Collector Dissipation: 0.2 W
• DC Current Gain (h_fe): 40 to 180
• Transition Frequency, min: 500 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-23

Here is an image showing the pin diagram of this transistor.The 2SC1621 transistor can have a current gain of 40 to 180. The gain of the 2SC1621-B2 will be in the range from 40 to 80, for the 2SC1621-B3 it will be in the range from 60 to 120, for the 2SC1621-B4 it will be in the range from 90 to 180.Sometimes the "2S" prefix is not marked on the package - the 2SC1621 might only be marked "C1621".