2SD666A Bipolar Transistor

Characteristics of 2SD666A Transistor

  • Type: NPN
  • Collector-Emitter Voltage, max: 100 V
  • Collector-Base Voltage, max: 120 V
  • Emitter-Base Voltage, max: 5 V
  • Collector Current − Continuous, max: 0.05 A
  • Collector Dissipation: 0.9 W
  • DC Current Gain (hfe): 60 to 200
  • Transition Frequency, min: 140 MHz
  • Operating and Storage Junction Temperature Range: -55 to +150 °C
  • Package: TO-92MOD

Pinout of 2SD666A

Here is an image showing the pin diagram of this transistor.

Classification of hFE

The 2SD666A transistor can have a current gain of 60 to 200. The gain of the 2SD666A-B will be in the range from 60 to 120, for the 2SD666A-C it will be in the range from 100 to 200.

Marking

Sometimes the "2S" prefix is not marked on the package - the 2SD666A might only be marked "D666A".

Complementary PNP transistor

The complementary PNP transistor to the 2SD666A is the 2SB646A.

Replacement and Equivalent for 2SD666A transistor

You can replace the 2SD666A with the 2SC1473, 2SC1573, 2SC2383, 2SC3228, 2SC3244, 2SC3467, 2SD667A, 2SD668A, HSD1609S, KSC1009C, KSC2310, KSC2383 or KTC3228.
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