2SD1444A-Q 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): 90 to 180
• 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-Q transistor can have a current gain of 90 to 180. The gain of the 2SD1444A will be in the range from 60 to 260, for the 2SD1444A-P it will be in the range from 130 to 260, 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-Q might only be marked "D1444A-Q".The complementary PNP transistor to the 2SD1444A-Q is the 2SB953A-Q.You can replace the 2SD1444A-Q with the 2SC3254, 2SC3255, 2SC3345, 2SC3346, 2SC3709, 2SC3709A, 2SC3710, 2SC3710A, 2SC3747, 2SC3748, 2SD1061, 2SD1062, 2SD1271, 2SD1271-Q, 2SD1362, 2SD1363, 2SD1411, 2SD1411A, 2SD1412, 2SD1445A, 2SD1445A-Q, 2SD1588, 2SD1668, 2SD1669, 2SD553, 2SD568, 2SD569, 2SD866, 2SD866-Q, BD201, BD203, BD301, BD303, BD533, BD535, BD537, BD543, BD543A, BD543B, BD545, BD545A, BD545B, BD795, BD797, BD799, BD807, BD809, BDT81, BDT81F, BDT83, BDT83F, BDT91, BDT91F, BDT93, BDT93F, BDX77, D44H11, D44H11FP, D44H8, KSD1588, KSD568 or KSD569.