2SC3940-S Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 25 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 1 W
• DC Current Gain (h_fe): 170 to 340
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92MOD

Here is an image showing the pin diagram of this transistor.The 2SC3940-S transistor can have a current gain of 170 to 340. The gain of the 2SC3940 will be in the range from 85 to 340, for the 2SC3940-Q it will be in the range from 85 to 170, for the 2SC3940-R it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SC3940-S might only be marked "C3940-S".The complementary PNP transistor to the 2SC3940-S is the 2SA1534-S.The 2SC2859 (SOT-23), 2SC2883 (SOT-89), 2SC2883-Y (SOT-89), 2SC3265 (SOT-23), 2SC3265-Y (SOT-23), 2SC4118 (SOT-323), 2SC4210 (SOT-23), 2SC4210-Y (SOT-23), 2SD874 (SOT-89), 2SD874-S (SOT-89), BC818 (SOT-23), BC818-25 (SOT-23), BC818-25W (SOT-323), BC818W (SOT-323), BCX20 (SOT-23), KSC3265 (SOT-23), KSC3265-Y (SOT-23), KTC3265 (SOT-23), KTC3265-Y (SOT-23), KTC3876 (SOT-23), KTC3876S (SOT-23), KTC4376 (SOT-89) and KTC4376Y (SOT-89) is the SMD version of the 2SC3940-S transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SC3940-S with the 2SC1383, 2SC1383-S, 2SC1384, 2SC1384-S, 2SC2500, 2SC2500-A, 2SC2500-B, 2SC2500-C, 2SC2500-D, 2SC3940A, 2SC3940A-S, 2SC4408, 2SC4604, 2SD1207, 2SD1347, 2SD1616, 2SD1835, 2SD471, 2SD545, 2SD592, 2SD592-S, 2SD592A, 2SD592A-S, 2SD789, KSC2500, KSC2500-A, KSC2500-B, KSC2500-C, KSC2500-D, KSC5019, KSD1021, KSD1616 or KSD471AC.