Description
Protect your electronic projects from accidental reverse power connections with this compact Reverse Polarity Protection Board.
Compared to a simple series diode, this design offers significantly lower voltage loss during normal operation while still protecting against accidental reverse polarity.
The board uses a PNP transistor together with a diode and a handful of passive components to disconnect the load if the supply polarity is reversed. Under normal operation, the circuit introduces only a small voltage drop while providing reliable protection against one of the most common wiring mistakes during prototyping and experimentation.
Ideal for breadboard projects, prototypes, hobby electronics, laboratory setups, or any application where power leads may occasionally be connected incorrectly.
Features
- Reverse polarity protection for DC-powered circuits
- Compact through-hole design
- Easy to integrate into existing projects
- Low component count
- Suitable for hobby, educational, and laboratory use
- PCB supplied without components
Typical Applications
- Prototype electronics
- Microcontroller projects
- Analog circuits
- Sensor modules
- Small embedded systems
Board Only
This product includes the printed circuit board (PCB) only. Components are not included, allowing you to source parts locally or from your preferred supplier.
Whether you are building a one-off prototype or simply want a few protection boards ready for future projects, this PCB provides a convenient and reusable solution.
Schematic
