RC spark suppression filter

The most effective solution to arcing in switches is to install a RC suppression, or snubber, network. This employs a resistor and capacitor in series and is more effective at dealing with inductive arcing which occurs during switch activation. The energy stored in the inductor, the motor in the case of the Lenco, will subject the switch contacts to a high voltage as the motors magnetic field collapses. This voltage will arc across the open contacts until the gap is too large. The suppression network acts to absorb this energy and safely drain it from the circuit.

RC spark suppression network with 10cm long insulated cable legs which employs a 120ohm resistor in series with a 0.1uF capacitor. This combination works extremely well with the Lenco motor for silent, arc-free, shutdown.