[DeTomaso] Selecting Relays???

[thomas]

And the purpose of the diodes are to kill the flyback pulse from the coil when the relay is shut off.

It only matters if the relay is electronically controlled, like in an EFI circuit.

The diode also requires that the coil circuit is correctly polarized, or else the diode will short out the circuit, or burn out. 

Thomas

18 feb 2012 kl. 23:41 skrev SOBill at aol.com:

> IMHO
> 
> Relays with built in diodes damp voltage transients when the relay  
> deenergizes but take slightly longer to open the contacts ...... not normally  any 
> problem at all.
> 
> SPDT are more versatile. If there is no cost difference, why  not SPDT? 
> That is all I buy. If you use the same type of relay everywhere,  you only need 
> one type of spare.
> 
> Have fun  today,
> 
> sobill at aol.com  
> 
> 
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