2SC3940-Q 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): 85 to 170
• 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-Q transistor can have a current gain of 85 to 170. The gain of the 2SC3940 will be in the range from 85 to 340, for the 2SC3940-R it will be in the range from 120 to 240, for the 2SC3940-S it will be in the range from 170 to 340.Sometimes the "2S" prefix is not marked on the package - the 2SC3940-Q might only be marked "C3940-Q".The complementary PNP transistor to the 2SC3940-Q is the 2SA1534-Q.The 2SC2859 (SOT-23), 2SC4118 (SOT-323), 2SD874 (SOT-89), 2SD874-Q (SOT-89), KSC2859 (SOT-23), KTC3876 (SOT-23) and KTC3876S (SOT-23) is the SMD version of the 2SC3940-Q transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SC3940-Q with the 2SC1383, 2SC1383-Q, 2SC1384, 2SC1384-Q, 2SC2655, 2SC3940A, 2SC3940A-Q, 2SD545, 2SD592, 2SD592-Q, 2SD592A, 2SD592A-Q, 2SD863, KTC3209, KTC3211 or KTD863.