FNQ-7

FNQ-7 (time-delay breaking fuses) are specialized electrical fuses designed for use in capacitor-start, capacitor-run, and single-phase AC motors with non-inductive loads. These fuses offer high breaking capacity making them suitable for high inrush current applications. They have an operating time delay of 0.3 seconds and come in standard sizes such as 0.5, 0.75, 1, and 2 inches.The FNQ-7 fuse has a simple yet effective design. It consists of two pieces of metal in a V-shape attached by a thin strip of material. The lower portion of the fuse has an electrical conductor made of copper or alloys. The metal attached to the tip of the fuse is in the form of an oxide-filled ceramic or a nickel alloy. When the current in the circuit exceeds the rated current for the fuse, the current is able to heat up the metal enough to cause the strip to melt, thus breaking the connection and protecting any downstream components. The time delay feature allows for the capacitor in the motor to successfully start up without overloading.In addition to applications in capacitor-start, capacitor-run and single-phase AC motors, the FNQ-7 fuse is designed to provide protection in certain environments. The alloy casing is corrosion resistant and the hi-tech material specially designed to resist shock, vibration, and extreme temperatures. The FNQ-7 can be used in motor controls, timers, relays and other such equipment required for motor protection.One of the advantages of using FNQ-7 fuses is that they can be applied in high inrush current applications safely. This is due to the high breaking capacity of these fuses, which allows them to handle higher current levels before tripping. This prevents damage to downstream components by turning off the power when the current reaches an unsafe level.Overall, the FNQ-7 fuse is an efficient and effective solution for providing safety in motor control applications. Its time delay feature allows for smooth and safe operation of capacitor start, capacitor run and single-phase AC motors. The robust design and alloy casing also provide a high level of protection against shock, vibration, and extreme temperatures. This makes the FNQ-7 fuse one of the most reliable and cost-effective solutions for protecting motors.