2SB1201-S 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: -2 A
• Collector Dissipation: 15 W
• DC Current Gain (h_fe): 140 to 280
• Transition Frequency, min: 150 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-251

Here is an image showing the pin diagram of this transistor.The 2SB1201-S transistor can have a current gain of 140 to 280. The gain of the 2SB1201 will be in the range from 100 to 560, for the 2SB1201-R it will be in the range from 100 to 200, for the 2SB1201-T it will be in the range from 200 to 400, for the 2SB1201-U it will be in the range from 280 to 560.Sometimes the "2S" prefix is not marked on the package - the 2SB1201-S might only be marked "B1201-S".The complementary NPN transistor to the 2SB1201-S is the 2SD1801-S.The 2SA1364 (SOT-89), 2SB1115 (SOT-89), 2SB1115-YM (SOT-89), 2SB1122 (SOT-89), 2SB1122-S (SOT-89), 2SB1123 (SOT-89), 2SB1123-S (SOT-89), 2SB766A (SOT-89), BSP31 (SOT-223) and BSR31 (SOT-89) is the SMD version of the 2SB1201-S transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SB1201-S with the 2SB1202, 2SB1202-S, 2SB1203, 2SB1203-S, 2SB1204, 2SB1204-S or KTA1040L.