2SB743-R 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): 60 to 120
• 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-R transistor can have a current gain of 60 to 120. 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-Q it will be in the range from 100 to 200.Sometimes the "2S" prefix is not marked on the package - the 2SB743-R might only be marked "B743-R".The complementary NPN transistor to the 2SB743-R is the 2SD793-R.You can replace the 2SB743-R with the 2N4918, 2N4918G, 2N4919, 2N4919G, 2SB744, 2SB744-R, 2SB744A, 2SB744A-R, 2SB772, 2SB772R, BD132, BD176, BD178, BD186, BD188, BD190, BD436, BD436G, BD438, BD438G, BD440, BD440G, BD786, BD788, BD788G, KSB744, KSB744-R, KSB744A, KSB744A-R, KSB772, KSB772-R, KSE170, KSE171, KSH772, KSH772-R, MJE170, MJE170G, MJE171, MJE171G, MJE230, MJE231, MJE232, MJE233, MJE234, MJE235 or MJE370.