Converter In-Rush Thermistors etc, UPDATE -4
UPDATE on 17 Nov, Update 2 on 22 Nov, Update 3 on 16 Jan 14, Update 4 on 19 Oct 14. --------------- In a recent thread there was mention of how you can wreck your gizmo (in my case a converter) ...
Forum Discussion
BFL13 wrote:
According to this, the max in-rush is 40a on a single cycle, whatever that means. If it is 40a, why is a 20a thermistor adequate?...
Inrush current is maximum at the zero crossing point for the AC waveform which is periodic or cycles.
The max in-rush value is related to how much energy that can be dissipated, or safely turned into heat, for non-repetitive inputs which is the turn on, in-rush, or transient current.
The 20A rating is specified for repetitive, or steady state, or normal operation energy dissipation.
Both specifications are valid.
