1 - voltage required is the nominal coil voltage, since that is what will be applied. Give it a factor of 2 for safety.
2 - current requirement is the nominal coil current.
3 - Speed is probably not a consideration for relay coils, since they are not turned on/off very often, as compared to, for instance, a PWM motor drive.
Voltage required is the nominal coil voltage, since that is what will be applied. Give it a factor of 2 for safety.
Current requirement is the nominal coil current.
Speed is probably not a consideration for relay coils, since they are not turned on/off very often, as compared to, for instance, a PWM motor drive.
In your case, a 1N4001 will probably work just fine.
