RXEF075S

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PTC Resettable Fuses are a safety circuit protection device used to protect circuits from overcurrents, overloads and short circuits. The RXEF075S is an electronic fuse designed to protect components from short circuits in safety circuits. It is a type of PTC (positive temperature coefficient) resettable fuse which is designed to automatically reset after the over-current trip. This electronic fuse is typically used in areas such as industrial control, robotics, and communications.

Working Principle of RXEF075S

The RXEF075S electronic fuse has an integrated circuit construct, which consists of a PTC element along with a couple of discrete components. The PTC part is made up of a polymeric material which has a positive temperature coefficient. This means that PTC material\'s electrical resistance increases with an increase in temperature.

When an overcurrent flows in the circuit, the temperature of the device will increase. This will cause the PTC material to have an increased electrical resistance, eventually cutting off the power in the circuit. The device will remain in the tripped state until the current is removed, allowing the device to cool down until it reaches its normal state. When the device has cooled down, the current allows the circuit to turn back on and resumes its normal operation.

Operating Characteristics

The RXEF075S electronic fuse has an operating voltage of 8V - 60V and can handle currents up to 7.5A. Its tripping time can range from 3ms to 30ms depending on the size of the fault current path. The device has a thermal time of 2ms, meaning it will trip in 2ms once the current exceeds the current rating. The device has a reset current of 2x the current rating and a hold current of 1x the current rating.

The device has excellent reliability and has anMTBF of 5 million hours at rated conditions. The device has an operating temperature range of -40°C to 85°C. It is rated for between 10,000 and 250,000 pulses of overcurrent over its lifetime.

Applications

The RXEF075S electronic fuse can be used in a variety of applications including portable and embedded systems. It is also suitable for use in consumer electronics, automotive systems, medical equipment, industrial electrical equipment, power supplies, lighting, and communication systems. In all of these applications, the RXEF075S can protect sensitive components from harmful over-currents and short circuits.

Overall, the RXEF075S is a versatile and reliable resettable fuse, ideal for use in safety circuits. It can protect against short circuits, over-currents, and thermal overloads. The device’s small size and wide operating temperature range make it a great choice for many applications.

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