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Comment by periblepsis on How Does This Diode Affect This Circuit?

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Depending on the circuit before the LED (open or shorted across the LED location) there will either be 0 A or about 200 mA. After the LED is inserted as shown, there will be anywhere from 100 mA to 130 mA, which will also be present as an LED current. That's within the LED specs. The resistors before will dissipate about 0.5 W each (or try to), assuming the LED is shorted out, and will dissipate about 0.2 W each, with the LED in place. The LED will dissipate about 250 mW.

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