2SD1712-S 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): 80 to 160
• 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-S transistor can have a current gain of 80 to 160. The gain of the 2SD1712 will be in the range from 60 to 200, for the 2SD1712-P it will be in the range from 100 to 200, for the 2SD1712-Q it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SD1712-S might only be marked "D1712-S".The complementary PNP transistor to the 2SD1712-S is the 2SB1157-S.The BDP953 (SOT-223) is the SMD version of the 2SD1712-S transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SD1712-S with the 2SC2681, 2SC4388, 2SC4886, 2SC5100, 2SC5101, 2SD1485, 2SD1486, 2SD1487, 2SD1488, 2SD1713, 2SD1713-S, 2SD1714, 2SD1714-S, 2SD1715, 2SD1715-S, 2SD1716, 2SD1716-S or FJAF4310.