FNA-4/10

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FNA-4/10 is a type of specialty electrical fuse, designed specifically for use in lightly loaded circuits. It is typically used to protect small motors, fans and other low-voltage appliances from power surges, because of its low current interruption rating. The device consists of a metalized zinc oxide element, a support frame, and a plastic case. The element is connected between two terminals, and when the current in the circuit surpasses the rated value, the element melts, thereby interrupting the circuit.

In operation, the FNA-4/10 provides overcurrent protection, meaning that it is designed to protect against overloading, short circuits and lightning strikes. The fuse is rated to provide protection up to 250V AC or 48V DC, and can be used in circuits up to 20A. In terms of its physical size, the device measures 4.9 by 2.4 cm, and weighs a mere 15g. The fuse is also UL (Underwriters Laboratories) approved and has a maximum interrupting current rating of 10kA.

FNA-4/10 has a wide application field, from industrial to household and commercial purposes. It can be used in motor control circuits, air conditioners, health care equipment, vending machines, medical devices, elevators and other equipment needing overload protection. The wide temperature range makes the FNA-4/10 suitable for both indoor and outdoor applications.

The working principle of the FNA-4/10 is simple; when the current over the rated value, the device interrupts the circuit, thus providing protection. The device is designed to have a rapid response time; it is capable of quickly responding to electrical overloads and power surges, thus preventing damage to the connected equipment. The fuse also has a low internal resistance, thus ensuring that it does not become a source of heat that can damage the equipment.

Overall, the FNA-4/10 is a reliable and economical solution for protecting various electrical circuits. It is highly effective in providing protection against overloading, short circuits and power surges, thereby ensuring the safety and longevity of the connected equipment. The device is UL approved and suitable for both indoor and outdoor applications, making it a dependable choice for many industrial, household and commercial purposes.

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