MOSFETS +/- Voltages? Which to use?
-0.13A is the continuous drain current, Id.

Whenever someone says "something current", they mean the current into that thing. You hear this frequently with transistors: "drain current", "collector current", "base current", and so on.

With N-channel FETs or NPN BJTs, the current usually goes in the drain/collector, so the current is positive.

With P-channel FETs or PNP BJTs, the current usually goes out the drain/collector, so the current is negative.







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