Why Is a 750 mA Fuse Rated at 5 KV in Microwaves?

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jlobo
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why is a high voltage 750 miliamps fuse rated as 5 KV and not as 250 volts
 
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I'm going to take a wild guess here and say it's because the fuse is not protecting the microwave itself from overloading. It's protecting a high-voltage power supply inside the microwave from overloading.