2SC3944-R Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 150 V
• Collector-Base Voltage, max: 150 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 2SC3944-R transistor can have a current gain of 130 to 220. The gain of the 2SC3944 will be in the range from 65 to 330, for the 2SC3944-P it will be in the range from 65 to 110, for the 2SC3944-Q it will be in the range from 90 to 155, for the 2SC3944-S it will be in the range from 185 to 330.Sometimes the "2S" prefix is not marked on the package - the 2SC3944-R might only be marked "C3944-R".The complementary PNP transistor to the 2SC3944-R is the 2SA1535-R.The 2N5551S (SOT-23), DXT5551 (SOT-89), DZT5551 (SOT-223), FMMT625 (SOT-23), KST5551 (SOT-23) and MMBT5551 (SOT-23) is the SMD version of the 2SC3944-R transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SC3944-R with the 2SC1913, 2SC1913-R, 2SC1913A, 2SC1913A-R, 2SC2238, 2SC2238A, 2SC2238AY, 2SC2238B, 2SC2238BY, 2SC2238Y, 2SC2275A, 2SC2336, 2SC2336A, 2SC2336B, 2SC3298, 2SC3298-Y, 2SC3298A, 2SC3298A-Y, 2SC3298B, 2SC3298B-Y, 2SC3944A, 2SC3944A-R, 2SC4381, 2SC4382, 2SC4793, 2SC4883, 2SC4883A, 2SC5171, 2SD1138, 2SD1264, 2SD1264-P, 2SD1264A, 2SD1264A-P, 2SD401, 2SD401-Y, 2SD402, 2SD772, 2SD772A, 2SD772B, 2SD792, 2SD792A, 2SD792B, KSD401, KSD401-Y, KTC2238, KTC2238A, KTC2238AY, KTC2238Y, KTC4370, KTC4370A, KTC4370AY, KTC4370Y, KTD2061, KTD2061Y, MJE15030, MJE15030G, MJE15032, MJE15032G, MJF15030, MJF15030G, TIP41F or TIP42F.