PFNF.075.2 Circuit Protection

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PTC Resettable Fuses are one of the most commonly used components used in the modern electronics industry. They are a type of polymeric positive temperature coefficient (PTC) device used for circuit protection. They are used in a wide variety of applications ranging from consumer electronics, automotive, industrial, and even medical applications. They are used to protect circuits from damage due to overcurrent. The device works by quickly changing its resistance when a predetermined current magnitude is exceeded. This change in resistance will then cause a voltage drop, which will shut off the circuit and protect the device from any further damage.

PFNF.075.2 is a PTC Resettable Fuse from Littelfuse. It is a radial leaded PTC device that has a hold current of 7.5 amps and a trip current of 11 amps. It is rated for 125 VAC, 32 VDC, and has a maximum operating temperature of 85°C. It is designed to be used in numerous electronic applications where a protection device needs to be reset to its original status when the current is reduced.

The working principle of the PFNF.075.2 PTC Resettable Fuse is relatively simple. When the core of the fuse is exposed to an excessive current, it will heat up and cause the resistance of the core material to increase. This rising resistance will cause the current to drop drastically, thereby protecting the device from harm. When the current falls below the predetermined level, the core will cool down and the resistance will decrease. This will restore the original resistance level and allow normal current to flow throughout the circuit.

The main advantages of the PFNF.075.2 PTC Resettable Fuse include its ability to protect circuits from damage due to overloads, its low profile design, its excellent reset characteristics, and its low temperature coefficient. It is a reliable and cost-effective solution for protecting circuits from overcurrent, and it is readily available in a wide variety of sizes and current ratings. With its small size and low profile, it can easily fit into tight places where space is at a premium.

Overall, the PFNF.075.2 PTC Resettable Fuse is a cost-effective and reliable solution for protecting circuits from overcurrent events. It works by automatically resetting itself when the current exceeds a predetermined level, thereby protecting the circuit from further damage. With its small size and low profile, it can easily be used in numerous applications where space is at a premium. Additionally, it has excellent reset characteristics and a low temperature coefficient, making it suitable for use in a wide variety of conditions. As such, the PFNF.075.2 PTC Resettable Fuse is a great choice for any application where circuit protection is of utmost importance.

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