1% Precision FRL Fusible Resistor with Fusing Time Within 60 Seconds

Features

• Suitable for protecting circuit boards.
• Noncombustible insulating coating with solvent-proof and high-temperature-resistant properties.
• Low temperature coefficient of 200 ppm/°C.
• Uniform fusing time.

Product Positioning and Core Applications

The FRL Series is a flameproof fusible resistor designed for circuit board protection applications. It combines resistance functionality with a defined fusing characteristic, providing a fusing time within 60 seconds under the specified test conditions.

The resistor uses a noncombustible insulating coating with solvent-proof and high-temperature-resistant properties. A 200 ppm/°C temperature coefficient provides a defined temperature characteristic for electronic circuit applications where resistance behavior and circuit protection need to be considered together.

With reference to IEC 60115-1 and JIS C 5201-1, the FRL Series is suitable for electronic component selection and circuit protection designs in Japan, Korea, and other markets requiring clearly defined electrical and environmental characteristics.

Electrical and Mechanical Specifications

Applications

PCB Circuit Protection

The FRL Series can be used in PCB circuit protection positions where a resistor is required to perform its normal resistance function while also providing a defined fusing characteristic under specified conditions.

Electronic Equipment

The resistor is suitable for protection sections within electronic equipment where a flameproof fusible resistor with defined insulation and fusing characteristics is required.

Circuit Protection Applications

For electronic power and control circuits, the FRL Series provides a defined fusing time within 60 seconds under the specified test conditions. Its ≥1,000 MΩ insulation resistance and flameproof construction provide measurable electrical and construction characteristics for component selection.

High-Temperature Electronic Applications

For electronic circuits exposed to temperature-related operating conditions, the FRL Series provides a tested temperature range of -55°C to +155°C. Its noncombustible insulating coating is also specified as resistant to high temperature and solvents.

Technical Performance for Component Selection

The FRL Series provides several measurable characteristics that can support engineering selection:

• 200 ppm/°C temperature coefficient
• ≤60 seconds fusing time
• ≥1,000 MΩ insulation resistance
• -55°C to +155°C temperature test range
• 4× rated wattage for 5 seconds short-time overload test
• 40°C / 95% RH / 1,000 hours moisture-proof load-life test