Hey all,
Is the following a valid path of logic:
I need to switch on a 25 watt lightbulb using mains power. I have an automotive relay whose SPST contacts are rated at 30A at 12VDC. The voltage running through this circuit would be 120V, which is 10 times the voltage rating of the relay, but the current would be less than 1A, which is well below the current rating of the relay. I know that components usually fail because they are passed too much power, which overheats the part and destroys it. Since this relay is rated for 30A at 12VDC, using P=IV, it can handle 360 watts of power, therefore using a 120VAC lightbulb is safe.
My guess is that I made some incorrect statements and conclusions, can someone clear this up for me?
Is the following a valid path of logic:
I need to switch on a 25 watt lightbulb using mains power. I have an automotive relay whose SPST contacts are rated at 30A at 12VDC. The voltage running through this circuit would be 120V, which is 10 times the voltage rating of the relay, but the current would be less than 1A, which is well below the current rating of the relay. I know that components usually fail because they are passed too much power, which overheats the part and destroys it. Since this relay is rated for 30A at 12VDC, using P=IV, it can handle 360 watts of power, therefore using a 120VAC lightbulb is safe.
My guess is that I made some incorrect statements and conclusions, can someone clear this up for me?