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Resistors tout ohmic values down to 1?

Posted: 13 Feb 2013 ?? ?Print Version ?Bookmark and Share

Keywords:resistor? LED lighting? automotive electronics?

Vishay Intertechnology Inc. has extended its MCW 0406 AT Precision series of wide terminal thin film chip resistors with ohmic values down to 1?, which according to the company, is the industry's lowest for such a device in the compact 0406 package. In addition, the resistors combine their low ohmic values with precision tolerance of 0.1 per cent and precision TCR of 25ppm/K, stated the company.

The resistors feature high-temperature performance to 155C and high power dissipation of 250mW at an ambient temperature of 70C. These specifications allow designers to use the resistors in harsh and high-temperature environments without compromising power rating or electrical performance, Vishay indicated. The devices are equally effective whether the application requires their full power capability or only a fraction of the nominal rated dissipation in order to gain improved stability.

In addition to offering excellent high-temperature performance, the resistor claims to be extremely robust against thermal cycling and biased humidity. On a four-layer FR4 PCB, the devices handle up to 2,500 cycles of rapid temperature change over a span of -40C to 125C. High humidity robustness is achieved by a unique lacquer system. The devices are likewise qualified per accelerated tests including operation at 85C at 85 per cent relative humidity for 1,000 hours, making the MCW 0406 AT Precision suitable for virtually any application, the company boasted.

Typical applications will include power measurement in industrial and automotive electronics including Xenon and LED lighting systems, engine control units, gear box controls and braking systems.

Samples of the enhanced resistors are available. Production quantities will be available in February, with lead times of eight to 10 weeks for larger orders.

Datasheet: MCW 0406 AT-Precision





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