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Question:

Why is there a diode icon on the fuse?

Why is there a diode icon on the fuse?

Answer:

When the device is working properly and the fuse is not blown, the voltage across the fuse FU is zero.
May 9, 2017
Parallel to the fuse at both ends of the light-emitting diode does not light, when the fuse is blown,
May 9, 2017
The light-emitting diodes connected to both ends of the FU are illuminated to indicate that the fuse has been blown.
May 9, 2017

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