Spike through relays - Maybe yes, maybe no

If relay spikes are with AC relays, use an MOC3031 with a good triac.
The MOC3031 is a '0' point opto isolator trigger for Triacs.

When using Relays and Solenoids, overkill is in order, if your load is 3
to 5 amps, use a 20 - 30 Amp device, and place the flyback protection at
the driver device, not at the load end. If a fast recovery diode is at
the load, and there is any wire length at all, then the induced spike in
the wiring can kill your driver as well. Make sure that your flyback
diode is fast enough, and its current rating is sufficient to damp the
flyback waveform, and place it at the driver.

Vern

"Peter L. Peres" wrote:
>
> > spike through relays
>
> You can buy relays with groundable armature. This acts as a shield between
> the contacts and the coil. I don't have a type number for you...
>
> Anyway if the grounds are no laid properly then there is no need for the
> strike to jump the coils, it can be induced or direct ground current that
> does your circuit in.
>
> Peter

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