Depletion MOSFET Current Limiter

N-channel depletion MOSFETS can be used for more than just low power current limiting.  The following is an example of an approximately 10A bidirectional current limiter suitable for use in 24V circuits.  One thing to note, of course, is that this circuit is large, with a 12W resistor and two transistors requiring heat sinks, and expensive.

Depletion MOSFET Current Limiter.png

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