YS5940PTH

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PTC Resettable Fuses, or polymer positive temperature co-efficient resettable fuses, are specialized devices that are used to protect electronic equipment from surges and over-currents. The YS5940PTH is a specialized variant of the PTC resettable fuse which offers unique applications and features. This article will discuss the application field and working principle of the YS5940PTH.

Application Field of YS5940PTH

The YS5940PTH is a general purpose, low cost, fast-response, resettable fuse designed for low power applications, with a voltage rating of up to 20V and a current carrying capability of up to 5A. It is suitable for a variety of applications, including:

• Security systems
• Power supplies
• Electronic instruments
• Consumer electronics
• Portable devices

The YS5940PTH offers a variety of useful features which make it perfect for these applications, including:

• Excellent power derating capability
• Highly reliable protection
• Fast response time
• Short circuit protection
• Low temperature drift
• High temperature operation

Working Principle of YS5940PTH

The YS5940PTH PTC resettable fuse operates by using a special polymer that contains a positive temperature coefficient (PTC). When the current passing through the device reaches a certain level, the PTC polymer heats up and rapidly increases its resistance, which reduces current flow and thus protects the device from overheating and/or over-currents. Once the current is reduced back to a safe level, the polymer cools down and returns to its original low resistance state, allowing the device to resume its normal operation.

The YS5940PTH also features a unique self-resetting function, which means that the device can automatically reset itself after each over-current event. This feature helps to extend the life of the device and saves time and money on maintenance costs. The device also features a thermally activated cut-off (ATC) safety feature, which will automatically disconnect power if the temperature of the device exceeds a certain threshold.

Conclusion

The YS5940PTH PTC resettable fuse is a specialized device used for a variety of low power applications. It is reliable, fast-responding, and features useful features such as power derating, short circuit protection, low temperature drift, high temperature operation, and self-resetting. It is perfect for a wide range of applications, such as security systems, power supplies, consumer electronics, and portable devices.

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