How can I duplicate the behaviour of this component?

[guscrown]

I'm having problems hot swapping a powersource to my board due to the input capacitance, I have a big inrush current and hence I see arching (sparking) on the connector when I connect it to my board. I believe this could lead to damage down the line so I want to avoid it.

I tried NTC Thermistors to limit the inrush, they worked, but you suffer from the 120seconds reset time of the Thermistor.

This is the device in question:


This device limits the inrush current in a unique way, by creating a slow transition on the output voltage. But alas this is a very specialized device for military use, and hence must be very expensive, and also looks quite bulky.

Can you recommend a similar device but for commercial products? Or any other way to duplicate the behavior of this device?

Input source:
External Power Supply Brick. 24V DC
Steady State Current: 3A
Max Peak Current : 8A

[IanB]

This device limits the inrush current in a unique way, by creating a slow transition on the output voltage. But alas this is a very specialized device for military use, and hence must be very expensive, and also looks quite bulky.

You're funny. Quoting from the video: "The DVCL is very small, about one inch square." It's pictured in the video as a tiny package. Why do you think it looks quite bulky? 

Can you recommend a similar device but for commercial products? Or any other way to duplicate the behavior of this device?

This device is nothing special at all. Hint: The military uses very expensive, very ordinary components. That is why supplying to the military is so attractive--massive profits from overpriced items 

The simplest device that will do what you want is an inductor. However, passive inductors truly may be very big and bulky when they need to handle large currents. What the video shows is something like an active inductor, a module that electronically limits the rate of change of current dI/dt by applying a varying resistance in series with the supply.

I don't see anything that suggests such an item would be expensive or difficult to obtain commercially, although I couldn't give you any ideas about vendors. What search terms have you used so far?

[guscrown]

So far I've searched for MOSFETS as Soft-start controllers. And I've found many examples but nothing concrete.