2SD866A-R Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 100 V
• Collector-Base Voltage, max: 150 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 7 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 60 to 120
• Transition Frequency, min: 30 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The 2SD866A-R transistor can have a current gain of 60 to 120. The gain of the 2SD866A will be in the range from 60 to 260, for the 2SD866A-P it will be in the range from 130 to 260, for the 2SD866A-Q it will be in the range from 90 to 180.Sometimes the "2S" prefix is not marked on the package - the 2SD866A-R might only be marked "D866A-R".You can replace the 2SD866A-R with the 2SC2334, 2SC2527, BD543C, BD545C, BD711, BD743C, BD801, BD911, BDT85, BDT85F, BDT87, BDT87F, BDT95, BDT95F, KSC2334, MJE15028, MJE15028G, MJE15030, MJE15030G, MJF15030 or MJF15030G.