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PTC Resettable Fuses

Introduction

PTC (Positive Temperature Coefficient) Resettable Fuses are one of the most innovative and useful electronic protection components. These fuses, sometimes referred to as polyfuses, feature a current-sensitive element inside a fuse housing. When the current used by a device exceeds a given limit, this element expands rapidly. This expansion detonates the protective fuse, barriers the current and opens the circuit, thereby avoiding the risk of overheating and potential fire hazards.

However, unlike traditional fuses, PTC Resettable Fuses are capable of automatically resetting themselves after the power supply to a device is turned off and the temperature of the PTC element inside the housing drops to normal levels. This resetting process is known as auto-reclosure. Therefore, these fuses can be used multiple times.

0ZCG0150BF2C application field and working principle

The 0ZCG0150BF2C PTC Resettable Fuse has been designed for use in applications such as computers, audio systems, communications equipment, instrumentation, and medical devices. It has a wide variety of features that make it ideal for use in these applications, such as a low profile, high tolerance, high dielectric strength, low temperature coefficient, and reversed current protection.

The 0ZCG0150BF2C PTC Resettable Fuse works by using a solid-plate with a resistor embedded inside the element. This resistor is formed of a positive temperature coefficient through film, allowing it to be sensitive to current overload. When the current overloads on the fuse exceeds the rated limit, the resistor heats up and expands, opening the circuit and allowing excess current to safely dissipate.

The resetting process occurs when the internal heater cools down and the contact between the two isolated filter elements connected to the element is returned to normal. The self-resetting function of these fuses is especially useful because it means the fuses can be used again and again, offering substantial savings in cost and time spent replacing them.

Conclusion

The 0ZCG0150BF2C PTC Resettable Fuse has been designed to offer users a reliable, cost-effective and temperature-sensitive protection component for their applications. The self-resetting function of these fuses make them exceptionally versatile and efficient, and the wide variety of features that can be found on these fuses make them suitable for use in laptops, audio systems, communications equipment, instrumentation, and medical devices.

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