There are various methods for overcurrent protection in circuits, including commonly used thyristor based circuit protection, transistor based circuit protection, relay based circuit protection, disposable fuses, bimetallic temperature control circuits, and dedicated integrated circuit protectors.

Except for bimetallic strips and disposable fuses, all other methods require supporting circuits such as sensing elements, sampling amplification circuits, comparators, and control drive circuits. Their commonalities are: the number of components used is large, the number of leads is high, the PCB area increases, the difficulty of design and production debugging increases, and the cost also increases. Due to the large number of components and high failure rate, the service cost increases.

If disposable fuses and bimetallic strips are used, only one needs to be connected in series, which makes the circuit simple and reliable. However, disposable fuses are disposable and cannot be reused, while bimetallic strips will repeatedly connect the faulty circuit to expand the fault range if the fault is not ruled out.

Considering that none of the above methods are ideal, the self resetting overcurrent protector series PPTC product provided by Bern - PPTC overcurrent protector, is an ideal overcurrent protection component in circuits. Only one component needs to be connected in series, which can reduce the number of components, wire length, PCB area, and save costs (traditional sensing components, sampling amplification circuits, comparators, control circuits, and drive circuits can be removed at once); Not only does it improve the quality of the product, but it can also save manufacturing and service costs.

The PPTC of Bern Semiconductor overcurrent protection device has the following eight advantages:

1. Easy installation: PTC has no distinction between positive and negative polarity, and is not afraid of reverse connection. It can be connected in series with the circuit that needs protection. It is not only widely used, but also safe and reliable.

2. Reusable: After cutting off the power and troubleshooting, it automatically returns to normal without the need for manual replacement and can be reused.

3. Superior performance: not only overcurrent protection, but also resistance to long-term surge current damage to the circuit, and can protect the circuit before a fault occurs.

4. No reconnection: Under fault conditions, the faulty circuit will not be restored or repeatedly connected (other protective circuits, bimetallic strips, etc. will be repeatedly connected to expand the fault range).

5. Improving quality: It can enhance the quality of customer products, greatly reduce the natural damage rate of finished products, greatly extend the service life of products, and have no worries.

6. Product value-added: By adding high-tech elements, it can add new highlights to customers' products, making vulnerable circuits no longer fragile. Improved the usability of the product. Can be sold at a high price

7. Cost reduction: Compared to other protective circuits, it reduces the number of components, PCB area, damage during operation, and additional costs; And it can improve production efficiency and reduce defect rates.

8. Efficiency improvement: It can enhance the design efficiency of engineers and improve the accuracy and reliability of protection. Greatly reduce service costs and other hidden costs.