2SD1509 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 8 V
• Collector Current − Continuous, max: 2 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 2000
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.Sometimes the "2S" prefix is not marked on the package - the 2SD1509 might only be marked "D1509".The complementary PNP transistor to the 2SD1509 is the 2SB1067.You can replace the 2SD1509 with the 2SD1692, 2SD1692-K, 2SD1692-L, 2SD1692-M, KSD1692, KSD1692-G, KSD1692-O or KSD1692-Y.