Dc Voltage Spike Protection Circuit

Given that no varistors have a voltage.

Dc voltage spike protection circuit.

Dc transient voltage suppressor circuit. The zener diode used is rated for 12v. Mov s are best suited for protection on bidirectional ac power supplies while zener diodes are best suited for smaller low energy dc supplies. Here in this circuit a 9v dc source is feeding the load which is a dc motor.

This means that if the circuit were to receive voltage above 12v the zener diode would then break down and begin conducting. In its simplest form it can be provided by using a zener diode placed across the output of the regulated power supply. Also known as the let through voltage this specifies what spike voltage will cause the protective components inside a surge protector to short or clamp. 24 v dc 1 2 28 8 v dc.

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. The tvs circuit we will build for dc power is shown below. The most common form of voltage clamping devices are metal oxide varistors mov s and zener diodes. Another very simple form of over voltage protection uses an approach called voltage clamping.

Littelfuse is the world leader in circuit protection products and services offering. The main purpose of a voltage suppression circuit is to clamp the voltage to a safe level. A lower clamping voltage indicates better protection but can sometimes result in a shorter life expectancy for the overall protective system.