【Safety Isolation and Space Saving during Abnormal Conditions】FRN Series Fuse Fixed Resistors｜Reliable Protection of Circuit Boards from Overcurrent
Integrating the resistor and fuse functions into a single component, achieving both improved circuit safety and space-saving. This is a fuse-fixed resistor that combines the normal resistor function with a fuse function that safely and reliably disconnects (melts) the circuit when excessive load current flows. 【Features of FRN】 1. 【Two roles in one component】: Operates as a stable fixed resistor under normal conditions and safely disconnects the circuit during abnormal overcurrent. 2. 【Rapid melting characteristics】: Melts reliably within a short time (up to 30 seconds) under overload conditions of 12 to 25 times the rated power. 3. 【Wide lineup】: Supports rated power from 0.166W to 2W and resistance values from 0.22Ω to 10kΩ. 4. 【High environmental resistance】: Operates stably in harsh environments with a temperature range of -55℃ to +155℃. 5. 【Cost and labor reduction】: Reduces the number of components in the protection circuit, lowering implementation costs and management workload. *Catalogs, specifications, and requests for evaluation samples can be accessed from the URL below.
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basic information
Rated power: 0.166 to 2W Maximum operating voltage: 150 to 300V Maximum overload voltage: 200 to 600V Resistance value range: 0.22Ω to 10kΩ (E24) Resistance value tolerance: ±2% (G), ±5% (J) Operating temperature range: -55 to +155℃ Resistance temperature coefficient: ±350ppm/℃ Short-term overload: ΔR≦±(2.0%+0.05Ω) Durability (70℃ 1000h): ΔR≦±(5.0%+0.05Ω) Fuse time: within 30 seconds (when rated power is applied at 12 to 25 times) *Catalog requests, specification downloads, and evaluation sample requests can be accessed from the above URL.
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Applications/Examples of results
It is adopted in electronic and electrical circuits where preventing overheating and fires due to abnormal currents and protecting against excessive loads are essential. - Power circuits and AC/DC converters: Prevention of inrush current, overcurrent interruption on primary and secondary sides, and safety protection for switching power supplies. - Industrial equipment and control boards: Input and output protection for motor drives, PLCs, and inverter boards, as well as prevention of secondary failures in surrounding ICs. - Consumer and home appliances: Fuses for main power boards of air conditioners and washing machines, and protective measures for chargers and adapters. *You can access the download of catalogs and specifications or request evaluation samples from the URL above.
Company information
Our company has developed as a specialized manufacturer of electronic parts, specifically resistors, in an environment overlooking the Central and Southern Alps. Since our establishment in 1960, we have upheld the management philosophy of "creating reliable, high-quality, valuable products to contribute to society," and based on our extensive experience and achievements, we manufacture and sell numerous excellent products: resistors. In the rapidly evolving electrical and electronics industry, we strive for continuous research and development, equipped with both "speed and flexibility" to adapt to the changing times.
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