2SD1802 Bipolar Transistor

• Type: NPN
• 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: 15 W
• DC Current Gain (h_fe): 100 to 560
• Transition Frequency, min: 150 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-251

Here is an image showing the pin diagram of this transistor.The 2SD1802 transistor can have a current gain of 100 to 560. The gain of the 2SD1802-R will be in the range from 100 to 200, for the 2SD1802-S it will be in the range from 140 to 280, for the 2SD1802-T it will be in the range from 200 to 400, for the 2SD1802-U it will be in the range from 280 to 560.Sometimes the "2S" prefix is not marked on the package - the 2SD1802 might only be marked "D1802".The complementary PNP transistor to the 2SD1802 is the 2SB1202.The 2SD1623 (SOT-89) and 2SD1624 (SOT-89) is the SMD version of the 2SD1802 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.