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Is reverse polarity protection this simple?

I have decided to use a mosfet with the resistor and diode as it allows me to use a much more efficient mosfet and the cost difference is really negligible. Thanks everyone. I definitely understand ...
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2 votes

Is reverse polarity protection this simple?

As others have said, your circuit would work for reverse protection under ideal conditions, but might not work under real world conditions. For real conditions, an ideal diode IC (such as the Analog ...
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1 vote

Is reverse polarity protection this simple?

As others have noted, a TVS is a good idea for most practical situations (hot-plugging a capacitive load). (Note that the -CA is a bidirectional TVS, limiting reverse transient voltage as well.) An ...
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1 vote

Is reverse polarity protection this simple?

You have a (presumably dedicated) power supply, which is a lot more benign a source than, say, a vehicle “12V” power source. Nevertheless transients are possible. A TVS across the input would probably ...
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4 votes

Is reverse polarity protection this simple?

Almost. To make these somewhat reliable you need a bit more refinement. Some protection in the form of a zener diode protecting the Vgs is required. The are lots of application notes on this, for ...
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2 votes

Is reverse polarity protection this simple?

A single diode would suffice for reverse-polarity protection.
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10 votes

Is reverse polarity protection this simple?

For the case of a well regulated 12V input powering a single resistor, then yes. But, generally no. If your 12V source might ever have spikes (perhaps at plug in time) that exceed the (usually 20V) ...
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