RXEF020-2 Circuit Protection

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PTC resettable fuses are commonly referred to as Polyfuses® or "active fuses." They protect circuits, gear, and components from short-circuiting as well as overtemperature, and can reset or "recycle" after the fault has been cleared. PTC fuses are typically made of thermistors, or a semiconductor material that changes its resistance depending on the temperature. PTC resettable fuses work by tripping when their internal temperature rises to a specified level, due to an overcurrent or overtemperature. The PTC then slows the flow of electricity to a trickle, dissipating the heat and allowing the PTC fuse to reset.RXEF020-2 is one of such PTC Resettable Fuses.

RXEF020-2 is a resettable mini-blade fuse which provides over current and overtemperature protection for a wide range of applications. Its small size and solid-state construction make it ideal for use in miniaturised and automated systems. It has a rated voltage of 32Vdc and current rating of 20A. The operating temperature range is from -40°C to +125°C.

RXEF020-2 Application fields includes Automotive, Solar Control, Consumer Electronics, Home Appliances, Motor Control, Lighting Control, Robotics, Telecommunications, Industrial and OEM Electronics. RXEF020-2 can be used in power management, circuit protection circuits, automotive and home appliances. It can also be used in high-end electronic products such as telescopes, LED lighting, battery management systems, solar energy control, robotic controllers and medical monitoring equipment.

RXEF020-2 works by employing a thermistor as its main component. The thermistor typically comprises a resistive material and a polymer which is heat-sensitive. When the current through the thermistor increases, its temperature rises. As the temperature rises, so does the resistance of the material to the current, increasing the temperature further. The resistance continues to increase until the current is decreased by some external means. This reduction of current reduces the temperature until it reaches its original level.

When the PTC is exposed to temperatures that are too high or to rapid influxes of current, the polymer within the thermistor will swell and cause an increase in its resistance. This rise in resistance further increases the temperature of the fuse and causes it to trip. With the increase in temperature, the crystal structure of the polymer rearranges, creating a hard, insulating barrier that prevents further current from passing through. This barrier will remain until it cools back to its original temperature, at which point it will reset and allow current to flow through it again.

In conclusion, RXEF020-2 is a reliable and efficient PTC resettable fuses which is well-suited for use in a wide range of applications. It is capable of interrupting excessive current while preventing damage to equipment, providing protection from overcurrent and overtemperature. Thanks to its small size and solid-state construction, this resettable mini-blade fuse is ideal for miniaturised and automated systems.

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