Flywheel Diode/Snubber Circuit For a DC Coil?

[gerard]

Hi,

I have a hydraulic valve with a two 24Vdc, 31W coils. How do you calculate the size of the diode to place across a coil to prevent voltage spikes or back EMF?

Gerard

 

[Knobhead]

You don't, just shove a 50V 1A across it.

Never failed for the last 40 years.

 

[gerard]

You don't, just shove a 50V 1A across it.

Never failed for the last 40 years.

Thanks for that - do you, by any chance, have a link or manufacturer/supplier of these diodes?

 

[spark 68]

Any general purpose rectifier Diode will do for this application, 1N400X series spring to mind, (1N4001 to 1N4007), these are common and can be got from almost anywhere, Maplins, Rapid, CPC/Farnell, RS to name a few.

 

[gerard]

cheers for that