Dc Voltage Spike Protection Circuit

This means that if the circuit were to receive voltage above 12v the zener diode would then break down and begin conducting.

Dc voltage spike protection circuit.

Here in this circuit a 9v dc source is feeding the load which is a dc motor. A lower clamping voltage indicates better protection but can sometimes result in a shorter life expectancy for the overall protective system. In its simplest form it can be provided by using a zener diode placed across the output of the regulated power supply. To find the voltage rating of the mov allow for 20 headroom to account for voltage swell and power supply tolerances.

The zener diode used is rated for 12v. The tvs circuit we will build for dc power is shown below. Littelfuse is the world leader in circuit protection products and services offering. Click on the green links to find littelfuse circuit protection solutions.

Given that no varistors have a voltage. Another very simple form of over voltage protection uses an approach called voltage clamping. 24 v dc 1 2 28 8 v dc. The main purpose of a voltage suppression circuit is to clamp the voltage to a safe level.

The most common form of voltage clamping devices are metal oxide varistors mov s and zener diodes. Mov s are best suited for protection on bidirectional ac power supplies while zener diodes are best suited for smaller low energy dc supplies. Dc transient voltage suppressor circuit.