A resettable fuse protects electronic circuits from overcurrent. It stops excessive current flow and automatically resets after cooling down. It is used in power supplies, consumer electronics, and industrial systems.
What is a Resettable Fuses?
A reversible circuit breaker, also known as a polymeric PTC (Positive Temperature Coefficient) fuse, is a safety device. It uses a polymeric material that changes its resistance with temperature. If too much current is consumed, the interrupter heats up, increasing its resistance. This reduces the amperage and protects the circuit. When the fuse cools down, the resistance is reduced and normal operation resumes.
How Resettable Fuses work
Resettable Fuses work in three stages:
- Normal operation – the low resistance allows current to flow normally.
- Overcurrent – excessive amperage heats up the fuse. The resistance increases, restricting the flow of current.
- Automatic reset – the fuse cools down, the resistance decreases and the current continues to flow.
This allows rechargeable fuses to be reused, whereas conventional fuses have to be replaced after they blow.
Advantages of Resettable Fuses
- Reusable – they don’t need to be replaced after a fault.
- Fast tripping – quickly limits over-intensity.
- Low cost – reduces maintenance costs.
- Compact size – suitable for small electronic equipment.
Applications for Resettable Fuses
- Power supplies
Protect adapters, chargers and batteries against short circuits and overloads.
- Consumer electronics
Used in smartphones, laptops and games consoles to prevent damage caused by voltage spikes .
- Automotive systems
Protects circuits in electric vehicles , infotainment systems and LED lighting.
- Industrial equipment
Prevents the failure of motor controllers, sensors and control panels.
- Communication systems
Used to protect sensitive circuits in telecommunications networks and network equipment.
A range of high-quality, upgradeable fuses
Resettable Fuses increase safety and durability and DRex Electronics offers high-performance fuses for a wide range of applications.
You can find more technical information on IEEE Xplore.
Summary
Resettable Fuses protect circuits against overloads. They stop surges and trip automatically. They can be used in electrical, electronic, automotive and industrial systems. The selection of quality components guarantees reliability. To find the best reversible fuses, visit DRex Electronics.
