2SB740 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -70 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 0.9 W
• DC Current Gain (h_fe): 100 to 320
• Transition Frequency, min: 150 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92MOD

Here is an image showing the pin diagram of this transistor.The 2SB740 transistor can have a current gain of 100 to 320. The gain of the 2SB740-B will be in the range from 100 to 200, for the 2SB740-C it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SB740 might only be marked "B740".The complementary NPN transistor to the 2SB740 is the 2SD789.The BSP31 (SOT-223), BSR31 (SOT-89), FMMT591 (SOT-23) and FMMT591Q (SOT-23) is the SMD version of the 2SB740 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SB740 with the 2SA1534A, 2SA684, 2SB1229, 2SB647, 2SB764, 2SB892, 2SB985 or KTB764.