hi,
I am building a small project which have the ability to power on using a built in battery, or using a micro-usb, for this toggle purpose I need a 3 states switch - on/off/on. I have found the following switch which has exactly the features that I need:

the problem is, it is very big, and thick. so I looked over the internet and found this mosfet swtich:
http://www.ebay.com/itm/4-5-40V-DC-...300411?hash=item1c8c80437b:g:0qoAAOSwBlNZd2nW
in terms of size, it's what I need, because it's thin, and can be mount to flat surface using screws, but it doesn't have on/off/on feautre, does anyone know about this kind of switch which gives on/off/on ability which is small and thin and can woirk at 5v with 3amp?

Thanks

 

Your current requirement is really high for a small form, slide switch. Are you sure that you need to shove 3A through the switch? The two most common parts houses are Mouser and Digikey. Try searching for SP3T, on-off-on switches.

 

or using a micro-usb

USB A and B standard connectors have a maximum current rating of 2.0 Amps. Pretty sure a Micro-USB connector will have less capability. Companies like Cherry and Carling make miniature toggle switches and as mentioned can be found at most distributors. "Small and Thin" really doesn't give much to work with as my small and thin may not be your small and thin. Actual dimensions would help considerably.

Ron

 

USB A and B standard connectors have a maximum current rating of 2.0 Amps. Pretty sure a Micro-USB connector will have less capability. Companies like Cherry and Carling make miniature toggle switches and as mentioned can be found at most distributors. "Small and Thin" really doesn't give much to work with as my small and thin may not be your small and thin. Actual dimensions would help considerably.

Ron

well, I understand, but "small and thin" is something like the dimensions of the board switch in the ebay link above, it is perfect, and also provide enough ams. BTW, I have power bank charger which provide 2.4 amps, and I will probably need 2.4 amps max. not 3 :/

 

Your current requirement is really high for a small form, slide switch. Are you sure that you need to shove 3A through the switch? The two most common parts houses are Mouser and Digikey. Try searching for SP3T, on-off-on switches.

i need maximum of 2.4, and the project is small in space, but it is not very small in size it's about 140/140/70 box, and i do not have the room for a toggle switch, only a board like slide switch (for example the MOSFET Slide Switch which is used in this kind of projects that have space issues. the mosfet slide switch can give 8ams, so it's fine, but, it has only on/off, if I could find exactly the same MOSFET slide switch but with ON/OFF/ON it would be prefect :/

 

I think (I'm probably wrong) that the slider switch on the example board turns the power MOSFETs on and off, and they can handle up to 8amps. I don't think the switch is able to handle that kind of current without arcing and dying. I'm probably wrong.

 

I was wandering if I can use a 50v 0.5A with 5v 2.4A, I mean, if I calculate it, then it means I can, but is it strate forward? if they say 50v and 0.5A is it safe to say the proportonaly using 5v will give me anough ams? or do I missing some other things which are not taken into account.?
:/

 

if they say 50v and 0.5A is it safe to say the proportonaly using 5v will give me anough ams?

No. The max current rating is 0.5A for any voltage less than the max voltage rating.