2SB744-O Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -45 V
• Collector-Base Voltage, max: -70 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -3 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 45 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.The 2SB744-O transistor can have a current gain of 100 to 200. The gain of the 2SB744 will be in the range from 60 to 320, for the 2SB744-R it will be in the range from 60 to 120, for the 2SB744-Y it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SB744-O might only be marked "B744-O".The complementary NPN transistor to the 2SB744-O is the 2SD794-O.You can replace the 2SB744-O with the 2SB1143, 2SB1143-R, 2SB1165, 2SB1165-R, 2SB1166, 2SB1166-R, 2SB744A, 2SB744A-O, 2SB986, 2SB986-R, BD132, BD176, BD176-16, BD178, BD180, BD180G, BD188, BD190, BD786, BD788, BD788G, BD790, KSB744, KSB744-O, KSB744A, KSB744A-O, KSE171, KSE172, MJE171, MJE171G, MJE172, MJE172G, MJE233, MJE235, MJE250 or MJE252.