2SD1722-R Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 50 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 5 A
• Collector Dissipation: 20 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 180 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The 2SD1722-R transistor can have a current gain of 100 to 200. The gain of the 2SD1722 will be in the range from 70 to 400, for the 2SD1722-Q it will be in the range from 70 to 140, for the 2SD1722-S it will be in the range from 140 to 280, for the 2SD1722-R it will be in the range from 200 to 400.Sometimes the "2S" prefix is not marked on the package - the 2SD1722-R might only be marked "D1722-R".The complementary PNP transistor to the 2SD1722-R is the 2SB1165-R.The 2SD1624 (SOT-89), 2SD1624-R (SOT-89) and BDP949 (SOT-223) is the SMD version of the 2SD1722-R transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SD1722-R with the 2SD1723, 2SD1723-R, BDX35, BDX36 or BDX37.