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Principle of power type NTC thermistor to suppress inrush current - News

Principle of power type NTC thermistor to suppress inrush current

305 Published by at December 13,2019

In order to avoid the surge current generated in the electronic circuit at the moment of startup, a power-type NTC thermistor is connected in series in the power circuit, which can effectively suppress the surge current at startup, and after the surge current is suppressed, Due to the continuous effect of its current, the resistance value of the power type NTC thermistor will drop to a very small degree, the power it consumes is negligible, and it will not affect the normal working current. Power type NTC thermistor is the simplest and most effective measure to suppress the surge during startup to ensure that electronic equipment is not damaged.

NTC thermistor 10d 9

Principle of power type NTCthermistor to suppress inrush current:

In the power supply part of the electronic circuit (LED driver board, fluorescent lamp converter, heater, etc.), a surge current that is a hundred times higher than the normal operating current will be generated at the moment of starting.

NTC thermistor has a large resistance value at normal temperature, which can suppress the surge current at the moment of starting up. After the suppression of the surge current is completed, as the temperature of the thermistor increases, its resistance value will drop to a very small The degree of power consumption is negligible to ensure the normal operation of the line.

NTC thermistor

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