Dc Voltage Spike Protection Circuit

24 v dc 1 2 28 8 v dc.

Dc voltage spike protection circuit.

Click on the green links to find littelfuse circuit protection solutions. Dc transient voltage suppressor circuit. Littelfuse is the world leader in circuit protection products and services offering. Dc input circuits can experience current overload short circuit conditions or voltage transients esd etc and require ptcs multilayer varistors and fuse protection to meet regulatory standards or to ensure reliable operation.

With the zener diode voltage chosen to be slightly above the maximum rail voltage under normal conditions it will not conduct. The zener diode used is rated for 12v. Another very simple form of over voltage protection uses an approach called voltage clamping. The tvs circuit we will build for dc power is shown below.

To find the voltage rating of the mov allow for 20 headroom to account for voltage swell and power supply tolerances. This means that if the circuit were to receive voltage above 12v the zener diode would then break down and begin conducting. Mov s are best suited for protection on bidirectional ac power supplies while zener diodes are best suited for smaller low energy dc supplies. In its simplest form it can be provided by using a zener diode placed across the output of the regulated power supply.

The main purpose of a voltage suppression circuit is to clamp the voltage to a safe level. Here in this circuit a 9v dc source is feeding the load which is a dc motor. Given that no varistors have a voltage.