The maximum rms current of an SCR is 50 A. For a 120° sine wave conduction the form factor (FF) = 1.878 Find the average on-state current rating (ITAV).

To find the average on-state current rating (ITAV) for an SCR conducting for a 120° sine wave, you can use the following formula:

[

I_{TAV} = frac{I_{RMS}}{FF}

]

Where:

– ITAV is the average on-state current,

– IRMS is the maximum rms current (50 A),

– FF is the form factor (1.878).

Now, substituting the values into the formula:

[

I_{TAV} = frac{50 A}{1.878} approx 26.66 A

]

Therefore, the average on-state current rating (ITAV) is approximately 26.66 A.