Induction Suppression Capacitors
Handling Inductive Loads

By simply adding a capacitor to the line you will greatly reduce the electromagnetic interference that could damage the board or
interfere with the board's performance.

Capacitors at a Glance

  • Required for Handling Inductive Loads
     - Motors
     - Solenoids
     - Transformers
  • Capacitor Absorbs the High Voltages
  • Increase Lifespan of Relay
  • Stops Interference of Microprocessor Logic
  • Easy to Install
  • Use with AC or DC Applications
  • Not Required with Resistive Loads
Inductive Loads
Inductive loads can best be defined as anything with a magnetic coil, such as a motor, solenoid, or a transformer. Controlling a inductive load using our relay controllers requires the use of induction suppression capacitors. The purpose of this capacitor is to absorb the high voltages generated by inductive loads, blocking them from the contacts of the relay. Without this capacitor, the lifespan of the relay will be greatly reduced. Induction can be so severe that it electrically interferes with the microprocessor logic of our controllers, causing relay banks to shut themselves down unexpectedly. In the case of USB devices, customers may experience loss of communications until the device is reconnected to the USB port.

Easy To Install

As you can see from the diagram below, a induction suppression capacitor is very easy to install. The capacitor should be located as close to the relay controller as possible, and is connected in parallel with the load you are trying to control. Induction suppression capacitors are NOT polarized, and may be used in both AC or DC applications.

Choosing the Right Capacitor

Choosing the correct induction suppression capacitor is simply a matter of choosing the maximum voltage requirement of the device you are trying to control. During checkout you will have the opportunity to purchase capacitors.

Resistive Loads

Unlike inductive loads, resistive loads such a incandescent lights and element heaters (without a fan), do NOT require an induction suppression capacitor, and will NOT benefit from its use.