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LTSPICE ISO16750-2 Load Dump(Pulse 5B) Model

Category: Hardware
Product Number: LTSPICE
Software Version:


I am trying simulate ISO16750-2 Pulse 5B for 12V systems with SMDJ22A. If I am not wrong, pulse current should be Ipk = (Vs-Vc) /Ri . When I checked simulation result , Vclamp was around 29,8V and TVS current was around 60A. But I already set Ri as 1 ohm. There is a inconsistency at source impedance. It seems Ri behave like dynamic resistance. Is it normal?

Could you clarify this point?