2SD1444A Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 40 V
• Collector-Base Voltage, max: 50 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 7 A
• Collector Dissipation: 30 W
• DC Current Gain (h_fe): 60 to 260
• Transition Frequency, min: 150 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F

Here is an image showing the pin diagram of this transistor.The 2SD1444A transistor can have a current gain of 60 to 260. The gain of the 2SD1444A-P will be in the range from 130 to 260, for the 2SD1444A-Q it will be in the range from 90 to 180, for the 2SD1444A-R it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SD1444A might only be marked "D1444A".The complementary PNP transistor to the 2SD1444A is the 2SB953A.You can replace the 2SD1444A with the 2SD1271, 2SD866, BD201, BD203, BD301, BD303, BD533, BD535, BD537, BD543, BD543A, BD543B, BD545, BD545A, BD545B, BD795, BD797, BD799, BD807, BD809, BDT81, BDT81F, BDT83, BDT83F, BDX77, D44H11, D44H11FP or D44H8.