The Working Principle and Application Precautions of PPTC?
The working principle of PPTC(Polymeric Positive Temperature Coefficient) is based on the positive temperature coefficient property of the material. At normal operating temperature, the material of the fuse is in a low-resistance state; once the current exceeds the rated value, the internal temperature of the fuse rises, causing the material to be in a high-resistance state, limiting the flow of current and preventing equipment damage or fire caused by overcurrent. But once the current drops to a safe value range, the internal temperature of the fuse drops, and the material assumes a low-resistance state again, returning to a normal energized state.
Fig.1
The application precautions of the PPTC resettable fuse are as follows:
1. Fully understand the working conditions of the protected circuit, and choose the appropriate rated voltage and current value of the fuse.
2. Avoid damage to the fuse by mechanical or other physical factors, resulting in failure or self-recovery.
3. During the installation process, avoid the fuse being in a high-temperature environment or subject to excessive vibration, so as to prevent the fuse from failing early or being disturbed from self-recovery.
4. For the fuse that needs to be replaced, a fuse with the same specification and performance must be selected for replacement.
5. For circuit equipment that is not commonly used, the status and function of the fuse should be checked regularly to ensure that it can work normally when needed.
Fig.2
- +1 Like
- Add to Favorites
Recommend
- The Operating Principle of Self Recovering Fuse PPTC in USB Protection
- Motor overheating? Wayon PPTC has the solution for you and has High reliability, and meet the AEC-Q200 standard qualified
- Yint Offered a 1.2GHz Signal Line Protection Solution Including Air Release Tube, PPTC, and ESD devices
- The Applications of PPTC Protection Devices in Wireless Electronic Products, Battery Packs, Chargers, Power Converters and Transformers
- Yint Developed CBR- series PPTC Thermistors which can Solve the Problem of Abnormal State Protection of Electronic Ballasts
- What Is The Difference between Resettable Fuses and Traditional Fuses?
- fuse PPTC for overcurrent protection in photovoltaic street light controllers
- A 12V DC Lightning Protection Solution from Yint
This document is provided by Sekorm Platform for VIP exclusive service. The copyright is owned by Sekorm. Without authorization, any medias, websites or individual are not allowed to reprint. When authorizing the reprint, the link of www.sekorm.com must be indicated.