2SB1109 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -160 V
• Collector-Base Voltage, max: -160 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.1 A
• Collector Dissipation: 1.25 W
• DC Current Gain (h_fe): 60 to 320
• Transition Frequency, min: 140 MHz
• Operating and Storage Junction Temperature Range: -50 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The 2SB1109 transistor can have a current gain of 60 to 320. The gain of the 2SB1109-B will be in the range from 60 to 120, for the 2SB1109-C it will be in the range from 100 to 200, for the 2SB1109-D it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SB1109 might only be marked "B1109".The complementary NPN transistor to the 2SB1109 is the 2SD1609.The HSB1109S is the TO-92 version of the 2SB1109.You can replace the 2SB1109 with the 2SA1220A, 2SA1352, 2SA1353, 2SA1380, 2SA1381, 2SA1406, 2SA1407, 2SA1478, 2SA1479, 2SA1480, 2SA1540, 2SA1541, 2SB1110, HSB1109, KSA1220A or KSA1381.