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Bench Talk for Design Engineers

Bench Talk

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Bench Talk for Design Engineers | The Official Blog of Mouser Electronics


Which Switch: Who Cares if it’s AC or DC?! Rudy Ramos
Have you ever tried to use a switch in an application and wondered whether the difference between the AC and DC rating on switches really matters? ­­There is a fallacy that any switch can be used so long as its current rating exceeds the maximum load requirements in the circuit. Who cares if it’s AC or DC, it’s only a 12VDC system right? Wrong; when it comes to switches, the differences in current-carrying capacity are dramatically different between AC and DC circuits and this is typically reflected in the switch’s AC and DC ratings.

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