2SC3855-O Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 140 V
• Collector-Base Voltage, max: 140 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 10 A
• Collector Dissipation: 100 W
• DC Current Gain (h_fe): 50 to 100
• Transition Frequency, min: 20 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3P

Here is an image showing the pin diagram of this transistor.The 2SC3855-O transistor can have a current gain of 50 to 100. The gain of the 2SC3855 will be in the range from 50 to 180, for the 2SC3855-P it will be in the range from 70 to 140, for the 2SC3855-Y it will be in the range from 90 to 180.Sometimes the "2S" prefix is not marked on the package - the 2SC3855-O might only be marked "C3855-O".The complementary PNP transistor to the 2SC3855-O is the 2SA1491-O.You can replace the 2SC3855-O with the 2SC2581, 2SC2837, 2SC2837-O, 2SC3263, 2SC3263-O, 2SC3284, 2SC3284-O, 2SC3519, 2SC3519-O, 2SC3519A, 2SC3519A-O, 2SC3519A-P, 2SC3519A-Y, 2SC3856-O, 2SC4468, 2SC4468-O, 2SC6011, 2SC6011-O, 2SC6011A, 2SC6011A-O, 2SC6011A-P, 2SC6011A-Y, 2SC6145, 2SC6145-O, 2SC6145A, 2SC6145A-O, FJA4310, FJA4310R, MAG6333, MAG6333A, MJW3281A or MJW3281AG.