[GreenKeys] To snub or not to snub?

[jhhaynes at earthlink.net]

You have to snub to protect the transistor.

One scheme is an R-C series circuit, where you choose the R and C
so that it snubs adequately and dissipates the energy in the resistor.

Another scheme is to run the R-C series circuit from colletor to
base of the switching transistor, so the inductive spike keeps the
transistor conducting until it dies out.

And another scheme is to use a Zener diode or a MOV device to
absorb the transient.




jhhaynes at earthlink dot net