To calculate what size SCR you need, use our calculator. Add in your percentage of margin, the heater wattage and voltage and find out exactly what size SCR you need.
Power Calculator
Three phase Single phase
Amperes:
30 ampere 45 ampere 80 ampere 100 ampere 125 ampere 150 ampere 180 ampere 230 ampere 300 ampere 380 ampere 450 ampere 580 ampere 720 ampere
Mode Selection:
Zero Cross-over Zero Cross-over 2 Wire (3P only) Zero Cross-over 3 Wire (3P only) PA Resistance load Inductive/Transformer load Phase Angle Current Control
Voltage Selection:
100-480 volt AC 600 volt AC (3P only)
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