2SC3951-F Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 70 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 3 V
• Collector Current − Continuous, max: 0.3 A
• Collector Dissipation: 8 W
• DC Current Gain (h_fe): 160 to 320
• Transition Frequency, min: 600 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126F

Here is an image showing the pin diagram of this transistor.The 2SC3951-F transistor can have a current gain of 160 to 320. The gain of the 2SC3951 will be in the range from 40 to 320, for the 2SC3951-C it will be in the range from 40 to 80, for the 2SC3951-D it will be in the range from 60 to 120, for the 2SC3951-E it will be in the range from 100 to 200.Sometimes the "2S" prefix is not marked on the package - the 2SC3951-F might only be marked "C3951-F".The complementary PNP transistor to the 2SC3951-F is the 2SA1536-F.You can replace the 2SC3951-F with the 2SC1567, 2SC1567A, 2SC2690, 2SC2690-P, 2SC3599, 2SC3599-F, 2SC3952, 2SC3952-F, 2SC3954, 2SC3954-F, 2SD1684, 2SD1724, 2SD1725, 2SD414, 2SD414-P, 2SD415, 2SD415-P, 2SD600, 2SD600-F, 2SD600K, 2SD600K-F, 2SD669, 2SD669-D, BD169, BD237, BD237G, BD379, BD379-25, BDX37, KSC2690, KSC2690-Y, KTC2803, KTC2803-GR, MJE242, MJE244 or MJE722.