2SD1712 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 100 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 5 A
• Collector Dissipation: 60 W
• DC Current Gain (h_fe): 60 to 200
• Transition Frequency, min: 20 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3PF

Here is an image showing the pin diagram of this transistor.The 2SD1712 transistor can have a current gain of 60 to 200. The gain of the 2SD1712-P will be in the range from 100 to 200, for the 2SD1712-Q it will be in the range from 60 to 120, for the 2SD1712-S it will be in the range from 80 to 160.Sometimes the "2S" prefix is not marked on the package - the 2SD1712 might only be marked "D1712".The complementary PNP transistor to the 2SD1712 is the 2SB1157.The BDP953 (SOT-223) is the SMD version of the 2SD1712 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SD1712 with the 2SC2681, 2SD1485, 2SD1486, 2SD1487, 2SD1488, 2SD1713, 2SD1714, 2SD1715 or 2SD1716.