VDC anc VAC

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amcmac

Member - Posts: 23

Joined: April 22, 2003

Location: United States

Posted: April 24, 2003 at 3:42 PM / IP Logged

I want to install a momentary push-button switch. However the only one that I like that matches my dash is a Radioshack switch. It has a rating of 3A @ 125VAC or 1.5A @250VAC. Is there any formula that will tell me how many amps this switch can handle on 12VDC? That brings me to my next question. Can I even use a VAC switch in a VDC system?

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Ryan Smith

Member - Posts: 16

Joined: March 01, 2003

Posted: April 24, 2003 at 10:36 PM / IP Logged

You can certainly use an AC switch in a DC circuit, no problem at all. As far as current ratings go, myself, I wouldn't exceed the AC ratings you have for it. If you need more current, have said switch trip a relay. Technically though, if you used a current formula to figure it up, you could probably easily put 10-12 amps across that switch.

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chuckles

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Joined: February 11, 2003

Location: United States

Posted: April 25, 2003 at 11:41 AM / IP Logged

Amperage and Voltage are Directly Related, meaning that if you have a switch rated at 3 amps @ 120 volts it is good for 30 amps at 12 volts. 12 will go into 120 10 times so 10 times 3 = 30 amps. Chuckles

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VDC anc VAC

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