time delay circut

Thread Starter


Joined Sep 4, 2006
I am looking for some recommendations regarding an application I am working on. I have a 110 volt AC circuit. I need a 3 second ramp up to full power at power on, like a rheostat effect but without using a rheostat or timer. I also have a size constraint, where I would like to fit whatever component is used into no more than a ¾” square housing. Any help is appreciated.


Joined Oct 28, 2005
How many amps is the load? Is there reactance from the load? Check National Semiconductor's website reguarding IGBTs and Power Mosfets.