0805L050WR

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PTC resettable fuses, also known as polyfuses, have become an increasingly popular way of protecting electrical circuitry from over current. These fuses are an improvement on the traditional fuse in that they reset themselves after they have been tripped by too much current, meaning they can be used again and again. The 0805L050WR is one of the most widely used resettable fuses in the world, and is used in a variety of applications. The 0805L050WR is a circuit protection device designed to protect your circuit from over current.

Application Field

The 0805L050WR is a widely popular and versatile resettable fuse used in many consumer and industrial applications. It is commonly used in automobiles, computers, phones and other electronic equipment, and is suited to a huge range of applications where over current protection is necessary. It can be used to protect sensitive components like voltage regulators, transistors and ICs from the effects of overcurrent, and is reliable and easy to install.

The 0805L050WR is also suitable for high-end power supplies, home automation systems, professional audio applications, medical and industrial equipment, and any other application requiring reliable short circuit and over current protection.

Working Principle

The 0805L050WR resettable fuse is based on a positive temperature coefficient (PTC) thermistor which is integrated into the lead frame. The PTC thermistor is a semiconductor component which is characterised by a substantial increase in electrical resistance in response to an increase in applied temperature. When the circuit current exceeds a certain level, the resistance of the PTC thermistor increases rapidly and generates heat. This heat causes the temperature of the PTC thermistor to increase rapidly, blocking the current path.

When the current path is blocked, the level of the current drops, allowing the resistor to cool down and the current path to be re-established. This reset process normally takes several seconds so the 0805L050WR is usually marked with a small hole to indicate that the fuse has been triggered. Once the 0805L050WR is reset, it is ready to be used again and can be reset multiple times.

The 0805L050WR is designed with a trip current of 50 mA and an operating voltage of 35 V max. It is rated for operating temperatures between -40°C and 85°C and is RoHS compliant, making it the ideal choice for many applications requiring reliable over current protection.

Conclusion

The 0805L050WR is a versatile and widely used PTC resettable fuse which provides reliable and easy-to-install over current protection for a huge range of consumer and industrial applications. It is designed with a trip current of 50 mA and an operating voltage of 35 V max, and is suitable for temperatures between -40°C and 85°C. With its wide range of applications and easy installation, the 0805L050WR is the perfect choice for many overcurrent protection needs.

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