2SB743-Q Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -40 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: 55 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 2SB743-Q transistor can have a current gain of 100 to 200. The gain of the 2SB743 will be in the range from 60 to 320, for the 2SB743-P it will be in the range from 160 to 320, for the 2SB743-R it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SB743-Q might only be marked "B743-Q".The complementary NPN transistor to the 2SB743-Q is the 2SD793-Q.You can replace the 2SB743-Q with the 2SA1217, 2SA1359, 2SB1143, 2SB1143-R, 2SB1165, 2SB1165-R, 2SB1166, 2SB1166-R, 2SB744, 2SB744-O, 2SB744A, 2SB744A-O, 2SB772, 2SB772O, 2SB772Q, 2SB986, 2SB986-R, BD132, BD176, BD176-16, BD178, BD186, BD188, BD190, BD786, BD788, BD788G, KSB744, KSB744-O, KSB744A, KSB744A-O, KSB772, KSB772-O, KSE170, KSE171, KSH772, KSH772-O, KTA1705, KTB772, KTB772-O, MJE170, MJE170G, MJE171, MJE171G, MJE230, MJE232, MJE233, MJE235 or MJE370.