1W safety resistor offers silent fusing operation
Vishay Intertechnology has announced a 1W axial cemented, fusible wirewound safety resistor that delivers safe and silent fusing operation during overload conditions, while withstanding pulse voltages of at least 2kV (1.2/50µs) per IEC 61000-4-5 for resistance values greater than 75Ω.
The AC01..CS resistor combines a fusing time under 30s for a 32W overload with a special nonflammable silicon cement coating for immediate interruption without flame and explosion when AC mains voltage (110/230VAC) is applied. Typical applications include electric appliances, energy meters and power supplies.
The device has been designed to meet UL1412 safety requirements (formal approval pending). In addition to fusing 'without a bang', the AC01..CS acts as an inrush current limiting resistor during normal operation. The safety resistor's specially developed lacquer coating has superior thermal and electrical insulating properties. This allows designers to meet safety requirements more easily, while eliminating the need to put additional fuses in series with the input resistor.
The AC01..CS provides a power rating of 1.1W at an ambient temperature of 40°C and 1.0W at 70°C. The RoHS-compliant device offers resistance from 3 to 100Ω, resistance tolerance of ±5% and temperature coefficient of resistance of ±200ppm/K.
Samples and production quantities of the AC01..CS safety resistor are available now, with lead times of 8-10 weeks.
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