LVR012S

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PTC Resettable Fuses

The family of polymeric positive temperature coefficient (PPTC) resettable fuses has been developed in recent years to improve electronic device safety. PTC resettable fuses are also known as polyswitch fuses, and are available in a variety of sizes and configurations to meet different electrical requirements and current ratings. An example of these fuses is the LVR012S, which is designed for sensing and protection of 12V DC circuits.

The working principle of the LVR012S is based on the PPTC thermistor effect. When the device is exposed to an over-current, a heating effect takes place which initiates the self-activation of this polymeric element. This causes an increase of electrical resistance on the circuit, which limits the device from being exposed to further damage or harm. The PPTC element then remains in this resistance state until the current is decreased below its rated hold current, and then slowly cools back down to its original un-activated low resistance state.

The over-current rating of the LVR012S is 4A, the voltage rating is 12V DC, and the resistance (at application) of the device is 0.3 Ohms. This fuse is typically available in 6.3mm radial or 5mm pitch through hole packages, and is suitable for different types of applications such as motor protection, battery over-current protection, circuit protection, and protection for LED lighting intervals.

When used as a circuit breaker, the LVR012S can be wired in series with a fuse-holder in order to protect AC and DC circuits. This series of operations ensures that the fuse will automatically reset itself when the current in the circuit decreases, thus providing a very reliable protection. When used as battery over-current protection, the LVR012S can be wired in parallel with the battery for protection against short circuits and power surges.

Another big advantage of the LVR012S is that it is able to sense and protect itself from very low currents due to its low resistance (0.3 Ohms). This means that a device which is powered by a battery can now be monitored and protected from any dangerous electrical conditions which would otherwise damage the device. Additionally, the PPTC materials used in the fuse also provide insulation properties, which is particularly useful in electrical systems which require higher insulation.

In conclusion, the LVR012S PTC resettable fuses are a reliable, affordable, and cost-effective solution for a variety of different applications. They are available in various forms and can be wired in series or in parallel with other components in order to protect electrical components from damage caused by over-current, short circuits, and power surge. Furthermore, their low-resistance rating makes them suitable for a wide range of commercial products, and their ability to automatically reset their low resistance state once the current is brought below its rated hold current is an added bonus. This makes the LVR012S fuse an ideal choice for those seeking reliable protection and safety of their electronics.

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