VLR110ULF

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PTC Resettable Fuses are electrical components used in many industries for protection against inrush current, short circuit protection, and over-current events. A PTC Resettable Fuse, also known as a poly-resettable fuse, is a type of fuse with a built-in thermal element that acts as a thermal cut-off switch. When used in circuit protection applications, the fuse will open a circuit when current flow exceeds a predetermined value which is set by the user. The most common application of a PTC Resettable Fuse is in automotive electronics and in consumer electronics.

VLR110ULF is a PTC resettable fuse manufactured by TE Connectivity. It play an important role in protecting electronic devices and circuits from short circuit conditions. The VLR110ULF has a voltage rating of 48V, and can be used to handle current of up to 10A. It is widely used in automotive, motor vehicle, computer, communication, and consumer electronics systems for protection against over-current events.

The working principle of the PTC resettable fuses is based on the thermal element, which is composed of positive temperature coefficient materials and polymeric materials. The thermal element is connected to the fuse body, when the current passes through it, heat is generated and the temperature of the thermal element rises quickly. When the current exceeds the "Hold-Current rating" value of the PTC, the temperature rises to a higher level and the resistance value of the thermal element increases significantly. As the resistance increases, the current flowing through the fuse is reduced, thus interrupting the circuit and protecting the device from the overload damage.

When the over-current condition is removed, the temperature of the thermal element will gradually decrease, and when the temperature returns to normal, the fuse will reset, and the circuit will be connected again. Therefore, the PTC resettable fuses are self-resetting fuses, and the reset operation can be done repeatedly.

VLR110ULF is a widely used PTC Resettable Fuse due to its high current handling capacity, low profile and reliable protection against short circuits. It is also widely used in applications such as automotive, industrial, and consumer electronic equipment. It can easily be installed on circuit boards, and can provide reliable protection from the overloads and short circuit conditions.

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