2SB1143-U Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -4 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 280 to 560
• Transition Frequency, min: 150 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 2SB1143-U transistor can have a current gain of 280 to 560. The gain of the 2SB1143 will be in the range from 100 to 560, for the 2SB1143-R it will be in the range from 100 to 200, for the 2SB1143-S it will be in the range from 140 to 280, for the 2SB1143-T it will be in the range from 200 to 400.Sometimes the "2S" prefix is not marked on the package - the 2SB1143-U might only be marked "B1143-U".The complementary NPN transistor to the 2SB1143-U is the 2SD1683-U.The 2SB1123 (SOT-89), 2SB1123-U (SOT-89), 2SB1124 (SOT-89), 2SB1124-U (SOT-89) and NZT660A (SOT-223) is the SMD version of the 2SB1143-U transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SB1143-U with the 2SB986, 2SB986-U, BD190, MJE235, MJE252 or MJE254.