Saturation block from MATLAB simulink allows the specification of maximum and minimum values which is allowed to pass through it. It can be used between the source and the load.

Saturation block generates an output signal which is the input signal value bounded to the upper and lower values of saturation. The parameters Upper and Lower limit specify the upper and lower limits.

But I use Simulink block. So the supply has two terminals and Saturation block cannot be connected in series (@Ravinder Kumar)

@Essam Ali, connect one terminal of the supply to input terminal of Saturation block. Then connect the output terminal of Saturation block to one terminal of load. Finally connect second terminal of load to second terminal of supply.

Dear Krishnarayalu Movva. Actually it cannot be connected to Dc source terminals.it is illegal in MATLB simulink. Did you try it?!

I feel a bit confused. I expect that second terminal of source and load are grounded so that we get a single line diagram. Please disregard my answer if it is not working. I used it with AC source in the following attachment.