2SC3944A-R Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 180 V
• Collector-Base Voltage, max: 180 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 15 W
• DC Current Gain (h_fe): 130 to 220
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F

Here is an image showing the pin diagram of this transistor.The 2SC3944A-R transistor can have a current gain of 130 to 220. The gain of the 2SC3944A will be in the range from 65 to 330, for the 2SC3944A-P it will be in the range from 65 to 110, for the 2SC3944A-Q it will be in the range from 90 to 155, for the 2SC3944A-S it will be in the range from 185 to 330.Sometimes the "2S" prefix is not marked on the package - the 2SC3944A-R might only be marked "C3944A-R".The complementary PNP transistor to the 2SC3944A-R is the 2SA1535A-R.The KST43 (SOT-23) is the SMD version of the 2SC3944A-R transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SC3944A-R with the 2SC1913A, 2SC1913A-R, 2SC2238A, 2SC2238AY, 2SC2238B, 2SC2238BY, 2SC2336, 2SC2336A, 2SC2336B, 2SC3298A, 2SC3298A-Y, 2SC3298B, 2SC3298B-Y, 2SC4382, 2SC4793, 2SC4883A, 2SC5171, 2SD1264A, 2SD1264A-P, 2SD772A, 2SD772B, 2SD792A, 2SD792B, KTC2238A, KTC2238AY, KTC4370A, KTC4370AY, KTD2061, KTD2061Y, MJE15032, MJE15032G, MJE15034 or MJE15034G.