How to Build an Overvoltage Protection Circuit Circuit Diagram What is Overvoltage Protection? Overvoltage protection is a power supply feature that clamps the output or shuts down the power supply at higher voltage levels. Often, the voltage level must exceed the preset level for the protection to occur. An over-voltage protection circuit mainly prevents damage to the electronic elements of many power
This simple overvoltage protection circuit is easy to construct with few easily available components. To start this circuit you need to decide the regulating voltage range of zener diode based on load element and then connect two PNP transistors with specific voltage rage. In this circuit we have used two BC557 PNP transistors as a switch. Learn how to protect your electronic devices from overvoltage, overcurrent, reverse polarity and back EMF with various circuits and components. See examples of crowbar, MOV, fuse, diode and SCR protection methods. Figure 1. A simplified illustration of a surge protection circuit used for intercepting a voltage surge. Normally, the electronics to be protected should continue to operate without interruption during an overvoltage. This requires the protective circuit to operate the circuit breaker (Q1 in Figure 1) in the linear range.
Zener + MOSFET overvoltage protection Circuit Diagram
A user asks how to design a simple circuit to protect a device from overvoltage (more than 13V) using a zener diode and a MOSFET. See various answers and simulations with different approaches and components.
Previously Overvoltage protection circuit designed by using Zener diode and transistor. That circuit acts as regulator and cutoff switch for low voltage DC supply. This circuit uses SPDT Relay to control DC voltage load with respect to protecting from Overvoltage. (You can transform this circuit to control high voltage DC or AC load with
Simple Overvoltage Protection Circuit Circuit Diagram
This circuit will protect the device from overvoltage occurrence and prevent any damage. For better results, overvoltage protection ICs can be used. Applications: The overvoltage protection circuit is an essential part of many electrical appliances. Few are listed below: It can be used in substations to protect the transformers from high Learn how to use Zener diodes to protect circuits from overvoltage damage. See the basics, simulation, and selection of Zener diodes for different voltage levels and current ratings.
Learn how to build an overvoltage protection circuit without using fuse, using Zener diode and PNP transistor. The circuit disconnects the output when the voltage exceeds the preset level set by the Zener diode. The circuit diagram for the Overvoltage protection circuit is given below. First, we consider the working of the circuit when the power supply is working properly. In proper working state, the base terminal of transistor Q2 is high which causes that transistor to turn OFF.
