Transistor Characteristic Apparatus Experiment, Physics instrument, general laboratory equipment manufacturers.

Triac Phase Control

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Triac Phase Control

Triac Phase Control


  • Study of TRIAC characteristics and its operation in all the four modes i.e. I+, I-, III+ and III-
  • Gate control of TRIAC with NPN transistor
  • Gate control of TRIAC with PNP transistor
  • Phase control with TRIAC and DIAC as pulse generator for gate trigger
  • Light dimmer with TRIAC-hysteresis effect and its minimization by gate slaving technique
  • Study the radio frequency interference (RFI) in phase control and its suppression by RFI filter

Built in parts:

  • DIAC
  • Two potentiometers for biasing and phase control
  • RF choke and capacitor for RFI filter
  • Lamp holder with 40 watt lamp for load in power control indicator
  • Adequate no. of other electronic components
  • Mains ON/OFF switch, fuse and jewel light


  • The unit is operative on 230V ±10% at 50Hz A.C. Mains
  • Adequate no. of patch cords stackable 4 mm spring loaded plug length ½ meter
  • Reliable terminal/sockets are provided at appropriate places on panel for connections/observation of waveforms
  • Weight : 3 Kg. (Approx.)
  • Dimension : W 340 x H 110 x D 210


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Objective :
  • Study of Triac and A.C. Phase Control (Study of Triac and A.C. Phase Control )
  • Study of Triac and A.C. Phase Control