SSR options for 10amp and 600mA draw

Hi Everyone,

I have 2 12v devices I would like to drive with my Arduino. My powersupply will be delivering 12V @ 28 amps. One of the devices I will be driving draws 10 amps and the other about 600mA.

I am looking for a simple solution for controlling these two. I have read through the forum and it looks there are a few options around solid state relays and using a transistor like the TIP120. My issue is the large amount of amps I will be drawing.

I will be using two separate pins to drive these two devices at different times.

Would something like the Crydom CC1125-ND work?

or is there something a little cheaper that will get the job done.

Thanks,

Joe

Looking at the device specs on the DC output SSR it states it's 10 amps maximum. It's never a good idea to operate a device right up to it's maximum rating.

I think a better solution and cheaper would be a logic level power FET. Below is a data sheet to one example. You should heat sink the FET and possibly add a pull down resistor to the gate to insure the device is off during Arduino reset and set-up. The FET can be driven directly from a digital output pin and can operate either in simple on/off or in PWM modes.

Seems to avalible at digikey for under $2 + shipping.

http://parts.digikey.com/1/parts/1023405-mosfet-n-ch-55v-47a-220ab-irlz44npbf.html

Lefty