Overvoltage protection circuit Eureka Circuit Diagram 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. 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. 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 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.
Complete Guide to Electronic Protection Circuits Circuit Diagram
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
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.
Voltage Protection Circuit ... Circuit Diagram
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.
