Westminster Department of Electronic Systems

Transistors


CMSA welcome page Components Index
Transistors: BC107 npn / BD135/6 npn/pnp / 2n3819 FET / 2n3704

Transistors: general

BC107 npn transistor BC107 npn transistor

BC107

  • low-current NPN bipolar transistor
  • TO18 can
  • Collector connected to can
  • Emitter marked with a tag on the edge of the can
  • Ic <= 100mA; 300mW; Vceo <= 45V
npn symbol pinout viewed from below
BD135 (npn) & BD136 (pnp) transistors

BD135 & BD136

  • NPN & PNP bipolar transistors
  • Collector connected to backplate
  • Pinout shown from the back; photo shows front
  • TO255 package
  • Ic <= 1.5A; 12.5Watts; Vceo <= 45V;
npn symbol pnp symbol pinout viewed from below
2n3819 Field Effect Transistor

2n3819

  • low-current Junction Field Effect Transistor (jFET)
  • TO5/TO18 can
FET symbol pinout viewed from below
2n3704 F
ield Effect Transistor

2n3704

  • low-current Junction Field Effect Transistor (jFET)
  • TO5/TO18 can
FET symbol pinout viewed from below
8-Amp voltage regulator

Voltage Regulators

  • power supply stabilisation
  • normally used with a zener diode producing the voltage reference
symbol