Input noise tolerance

One of the values that indicates the performance of a power supply device. It represents the maximum amount of noise, such as interference included in the input voltage, that the power supply can withstand while maintaining normal operation. A pulse-like voltage simulating noise is superimposed onto the commercial power source at the input terminal of the power supply device, and the maximum pulse voltage at which normal operation can still be maintained is used as the indicator. The larger this value, the stronger the resistance to noise included in the input.