2SB1141-S Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -18 V
• Collector-Base Voltage, max: -20 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1.2 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 140 to 280
• Transition Frequency, min: 150 MHz
• Operating and Storage Junction Temperature Range: -55 to +125 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The 2SB1141-S transistor can have a current gain of 140 to 280. The gain of the 2SB1141 will be in the range from 70 to 400, for the 2SB1141-Q it will be in the range from 70 to 140, for the 2SB1141-R it will be in the range from 100 to 200, for the 2SB1141-T it will be in the range from 200 to 400.Sometimes the "2S" prefix is not marked on the package - the 2SB1141-S might only be marked "B1141-S".The complementary NPN transistor to the 2SB1141-S is the 2SD1681-S.The BCX69 (SOT-89) is the SMD version of the 2SB1141-S transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SB1141-S with the 2SA1120, 2SA1357, 2SA715, 2SA738, 2SB1009, 2SB1127, 2SB1127-S, 2SB1140, 2SB1140-S, 2SB559, 2SB743, 2SB772, BD186, KSB772, KSH772, KTB772 or MJE370.