2SD1235-S Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 30 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 8 A
• Collector Dissipation: 30 W
• DC Current Gain (h_fe): 140 to 280
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The 2SD1235-S transistor can have a current gain of 140 to 280. The gain of the 2SD1235 will be in the range from 70 to 280, for the 2SD1235-Q it will be in the range from 70 to 140, for the 2SD1235-R it will be in the range from 100 to 200.Sometimes the "2S" prefix is not marked on the package - the 2SD1235-S might only be marked "D1235-S".The complementary PNP transistor to the 2SD1235-S is the 2SB919-S.You can replace the 2SD1235-S with the 2SC3255, 2SC3255-S, 2SC3748, 2SC3748-S, 2SC4551, 2SC4552, 2SD1062, 2SD1062-S, 2SD1212, 2SD1212-S, 2SD1669, 2SD1669-S, BD201, BD203, BD301, BD303, BD533, BD535, BD543, BD543A, BD545, BD545A, BD795, BD797, BD807, BDT81, BDT81F or D44H8.