Can you use DC rocker switch AC?
Yes, an AC switch should be fine to control a few milliamperes of a relay coil. The relay is designed to switch high DC currents.
Will AC rated switch work for DC?
For a given current rating the maximum safe DC voltage will be much lower than the maximum safe AC voltage – usually by a factor of 10:1 or more. At very low voltages (say 12VDC or less), switches designed for AC mains use will “probably” safely handle DC currents equal to their AC current rating.
Can you use a 120V AC switch for 12V DC?
The Square D line of QO breakers and QO load centers are rated for 120/240 Volts AC, and they also have a lower voltage DC rating. When used in DC branch circuits (circuits from the battery to the load) they can be used on 12 and 24 Volt battery systems.
Is there a difference between AC and DC toggle switches?
With dc, you’ve got a steady current in one direction, whereas with ac, both the magnitude and direction of the current change. When you switch off power to an ac circuit, a voltage spark (or arc) is created inside the switch that’s quickly extinguished—a desirable condition.
Can a DC rocker switch handle a DC current?
At very low voltages (say 12VDC or less), switches designed for AC mains use will “probably” safely handle DC currents equal to their AC current rating.
Can you use AC rated switches on DC relays?
I would use the AC switch to power a 12vdc auto relay. A 30 to 40 amp relay is only a few dollars. That’s a way! Use the timer to control a DC relay which uses only a little current for its coil. Can I use an AC rated switch to power this load and if so what ratings do I need to be looking for on the switch?
How does an arc form on an AC rocker switch?
With AC waveforms the voltage is zero twice in each cycle so any arc that has formed is extinguished at the zero crossing*. For an arc to continue to exist as the switch progressively opens the arc has to reform after each zero crossing, with a progressively larger gap each time.
How many amps does a 12V switch have?
The first thing to find out when considering using AC switches and such in a low voltage 12v or 24v system is the ‘amp rating’ of the particular item. Most AC lighting components are either rated 3A or 5A. Now here’s the thing: 3 amps at 240v AC power is equal to around 750 watts and that’s a lot of lighting power right there!