The PFB LITE peak spike suppressor uses carefully selected TVS diodes to absorb dangerous voltage peaks to protect the connected components. Peak spike suppressors are designed for use with electrolytic capacitors. The capacitor can be mounted directly on it. It prevents the voltage from rising from a certain voltage by absorbing and absorbing the energy of the voltage spike.

For electric drive systems that use brushless motors and lithium polymer batteries, very high voltage and current peaks will appear. The most widely known way to keep them in an area where they will not harm other connected loads is to use capacitors. This is actually a very good method. The capacitor suppresses all fluctuations in voltage by charging when the voltage rises and discharging when the voltage drops again. In some cases, voltage spikes are too fast for capacitors.

These peaks are in the range of nanoseconds and microseconds, and they can easily reach twice or three times the normal battery voltage. Most consumers can tolerate these voltage peaks, even if they are much higher than the actual maximum rated voltage. If the voltage peak is too strong or recurs over a long period of time, the voltage regulator, capacitor and FET may be damaged and fail. The spike suppressor absorbs these voltage peaks and therefore cannot even reach harmful voltages.

Using a spike absorber does not negate the need to also use that capacitor. The capacitor and spike absorber perform different tasks. I sometimes solder the capacitor directly to the pads on the AIO / 4 in 1 ESC board as long as there is enough space in the frame to accommodate it, and then run wires from those same pads to the spike absorber. In frames where I don’t have enough room, I will mount the capacitor on the spike absorber and solder it through the holes on the spike absorber, and run silicone wire leads from this combination back to the AIO / 4 in 1 ESC board.  It’s important to keep these wires as short as possible.

Try to avoid mounting the capacitor on the XT30 / XT60 connector and soldering to the plug. Having it this far from the electronics, nearer to the battery, makes it less effective.

This Rush offering is shorter than the Fettec spike absorber but just a little wider. The FETS are the same size but a different type.