Inrush Current

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Inrush is when a section of circuitry is first connected to a source and a rush of current flows into it. This is typically caused by capacitors when they are fully discharged and they act as a short-circuit. This rush of current is usually harmless to most RLC components and ICs but can cause havoc with fuses, diodes, and other over current protection.


Inductor in Series

Putting an inductor in series with the source. This method does not work as it will not change what the peak current can get to and this can cause more problems than it solves.

Resistor in Series

Putting a resistor in series with the source works by burning off excess current however this is very inefficient and should not be used in a satellite.

NTC Thermistor in Series

Putting a Negative-Temperature-Coefficent (NTC) thermistor in series with the source works by starting with a high resistance which drops as the thermistor heats up. This method will not work in space due to the large range of temperatures we operate in.

Latching Current Limiter (LCL)

This is a more complex option than the others mentioned here so please see this document for an explanation. This method has a 2ms response time and should suffice for our needs.