In designing a linear power supply, I understand I need to limit the inrush surge current on cold start, to charge up the large bank of filter capacitors, post-rectifier.
However, my original intent was to connect the transformer directly to the power entry module/fuse/breaker without a PC board in the path. Only the secondary stepped-down side would have a PC board and therefore could accommodate a thermistor.
Does it matter whether the NTC Thermistor for inrush current limiting is connected to the primary mains voltage or secondary winding of the transformer [before rectifiers]? My initial intuition is no, since they are proportional in current anyways, and limiting one winding will naturally limit the other.