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Cerbo GX Relay Fuse Size

I cannot find the spec for a fuse on the Relay circuit power wire for the Cerbo GX.


I have a couple of computer fans running off of the relay circuits and want to properly fuse the input power wires. Looks like the relays are rated to 6Amps up to 30VDC, but not sure if that is from an internal fuse or if that is when the board fails. Does a fast blow 5Amp fuse sounds correct for this?

cerbo gx
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mvas answered ·

You could use a 5A fast blow fuse.

How many total amps will the fans draw?

Is there any inrush current at turn on?

If yes, then slo-blow may be appropriate.

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hn3574 avatar image hn3574 commented ·
2.5Amp rated fan, no stated inrush current but assuming there is some I'll probably go 4Amp slow blow.


It sounds like the Cerbo GX relay is not internally fused so my concern is if it sees 6Amps for a very short period of time it will damage the relay. But maybe that 6Amp rating has some "built in" safety margin.

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