Thyristor Power Controllers

Thyristor Power Controllers, also known as Silicon Controlled Rectifiers (SCR) control the load or power that is supplied by a load. They are operated with an alternating Voltage in either a single-phase or three-phase.


The electronic component has a positive terminal (anode) a gate and a negative terminal (cathode). The gate is the control terminal, the main current flows between the positive and negative terminals.


The power controller can be DIN rail or panel mounted. Choosing which one will depend on the application.


The high-speed Thyristors are suitable for use in ovens, dryers, industrial furnaces, AC power switching, inductive loads such as transformers, resistive load and heating, and ventilation applications. They can also be used in lower power circuits light dimmers.


Depending on the switch loads you may need a heatsink.


Features of the different types of Thyristor power controllers


  • Zero crossing outputs

  • RFI suppression

  • Compensates for mains voltage fluctuations

  • Energy efficient

  • Small footprint
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Rincian Komponen Power Rating Stock Current Rating Weight Mounting Type Dimensions Fixing Centres Length Width Height Maximum Operating Temperature Minimum Operating Temperature
United Automation, PSR-25, Thyristor Power Controller, 6kW, 25A, 56 x 43 x 21mm
  • S$ 89,47
  • Each
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6kW 310 25A - Panel Mount 56 x 43 x 21mm 48mm 56mm 43mm 21mm +65 °C -
United Automation, ZVS-16DV, Energy Regulator, 3.7kW, 16A, 105g, 58 x 55 x 36mm
  • S$ 102,88
  • Each
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3.7kW 37 16A 105g Screw Mount 58 x 55 x 36mm 10mm - - - +85 °C -20 °C
United Automation, QVR-TB-RFI, AC Regulator with RFI Suppression, 78 x 41 x 65mm
  • S$ 80,04
  • Each
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- 35 - - Panel Mount 78 x 41 x 65mm - 78mm 65mm 41mm +65 °C -
United Automation, EVR-25PA, AC Phase Angle Controller, 25A, 87 x 95 x 146mm
  • S$ 201,93
  • Each
  • Compare
- 26 25A - Screw Mount 87 x 95 x 146mm 75 x 119mm - - - +65 °C -
United Automation, PR1-E-3KW, HVAC Control, 3kW, 12.5A, 1.1kg, 140 x 99 x 80mm
  • S$ 189,57
  • Each
  • Compare
3kW 15 12.5A 1.1kg Panel Mount 140 x 99 x 80mm 75 x 120mm 140mm 99mm 80mm +65 °C -
United Automation, QLC-TB-RFI, AC Regulator with RFI Suppression
  • S$ 86,74
  • Each
  • Compare
- 15 - - - - - - - - - -
United Automation, PR1-DIN-2.5KW, HVAC Power Regulator, 2.5kW, 11A, 94 x 75 x 83mm
  • S$ 96,38
  • Each
  • Compare
2.5kW 11 11A - DIN Rail 94 x 75 x 83mm - 94mm 75mm 83mm +65 °C -
United Automation, BVR-25, Variable Burst Firing Regulator, 25A
  • S$ 194,74
  • Each
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- 6 25A - Panel Mount - 75 x 119mm - - - +65 °C 0 °C
United Automation, PR3-DIN-12kW, Burst Fire Power Controller, 12kW, 16.7A, 600g, 90 x 217 x 87mm
  • S$ 180,14
  • Each
  • Compare
12kW 6 16.7A 600g DIN Rail 90 x 217 x 87mm - 90mm 217mm 87mm +40 °C 0 °C
United Automation, PR3-E-18KW, HVAC Control, 18kW, 25A, 2.6kg, 150 x 240 x 100mm
  • S$ 415,87
  • Each
  • Compare
18kW 5 25A 2.6kg Panel Mount 150 x 240 x 100mm 220 x 130mm 150mm 240mm 100mm +65 °C -
United Automation, ZAX27A, Thyristor Power Controller
  • S$ 94,56
  • Each
  • Compare
- 5 - - - - - - - - +65 °C 0 °C
United Automation, PR3-DIN-18kW, Burst Fire Power Controller, 18kW, 25A, 950g, 110 x 217 x 87mm
  • S$ 264,13
  • Each
  • Compare
18kW 4 25A 950g DIN Rail 110 x 217 x 87mm - 110mm 217mm 87mm +40 °C 0 °C
United Automation, PR3-E-12KW, HVAC Control, 12kW, 17A, 2.6kg, 150 x 240 x 100mm
  • S$ 542,01
  • Each
  • Compare
12kW 4 17A 2.6kg Panel Mount 150 x 240 x 100mm 220 x 130mm 150mm 240mm 100mm +65 °C -
United Automation, A407806, Thyristor Power Controller, 3kW, 13A, 175 x 65 x 195mm
  • S$ 341,94
  • Each
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3kW 3 13A - Screw Mount 175 x 65 x 195mm - 175mm 65mm 195mm +65 °C -
United Automation, A437426, Thyristor Power Controller, 36kW, 50A, 2.6kg, 241 x 152 x 115mm
  • S$ 731,11
  • Each
  • Compare
36kW 3 50A 2.6kg Screw Mount 241 x 152 x 115mm 220 x 130mm 241mm 152mm 130mm +45 °C -
United Automation, DMPR3-E-50kW 415V, Dual Mode Power Controller, 36kW, 50A, 5.2kg, 232 x 340 x 124mm
  • S$ 746,30
  • Each
  • Compare
36kW 2 50A 5.2kg Screw Mount 232 x 340 x 124mm 322 x 200mm 232mm 340mm 124mm +65 °C -
United Automation, EVR-25BF, AC Burst Fire Controller
  • S$ 209,95
  • Each
  • Compare
- 2 - - - - - - - - +65 °C -
United Automation, FC11AL/2, Universal Phase Angle Module
  • S$ 151,10
  • Each
  • Compare
- 2 - - - - - - - - +65 °C -
United Automation, TPSR-25, Thyristor Power Controller
  • S$ 41,17
  • Each
  • Compare
- 2 - - - - - - - - +65 °C 0 °C
United Automation, A437425, Thyristor Power Controller, 30kW, 42A, 2.6kg, 241 x 152 x 115mm
  • S$ 709,19
  • Each
  • Compare
30kW 1 42A 2.6kg Screw Mount 241 x 152 x 115mm 220 x 130mm 241mm 152mm 130mm +45 °C -
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