2SD858-R Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 5 A
• Collector Dissipation: 60 W
• DC Current Gain (h_fe): 40 to 90
• 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 2SD858-R transistor can have a current gain of 40 to 90. The gain of the 2SD858 will be in the range from 40 to 250, for the 2SD858-P it will be in the range from 120 to 250, for the 2SD858-Q it will be in the range from 70 to 150.Sometimes the "2S" prefix is not marked on the package - the 2SD858-R might only be marked "D858-R".The complementary PNP transistor to the 2SD858-R is the 2SB763-R.You can replace the 2SD858-R with the 2SD731, BD245A, BD245B, BD245C, BD249A, BD249B, BD249C, BD745A, BD745B, BD745C, BDV91, BDV93, BDV95, NTE390, TIP33A, TIP33B, TIP33C or TIP35CA.