2SB744A-Y Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -60 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): 160 to 320
• 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 2SB744A-Y transistor can have a current gain of 160 to 320. The gain of the 2SB744A will be in the range from 60 to 320, for the 2SB744A-O it will be in the range from 100 to 200, for the 2SB744A-R it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SB744A-Y might only be marked "B744A-Y".The complementary NPN transistor to the 2SB744A-Y is the 2SD794A-Y.The NZT660 (SOT-223) is the SMD version of the 2SB744A-Y transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SB744A-Y with the 2SB1167, 2SB1168, BD190, KSB744A, KSB744A-Y, MJE235, MJE252 or MJE254.