[SatNews] Vishay Intertechnology, Inc. (VSH: NYSE) has extended its E/H MIL-PRF-55342-qualified Thin Film surface-mount resistor chips in the 0505, 1005, 1505, 0705, 1206, and 1010 case sizes to offer a "T" reliability level for space applications — qualification on larger cases sizes is pending.

The enhanced resistors' established reliability is assured through 100 percent screening and extensive environmental testing that includes 100 percent group A, power conditioning, and Group B lot testing, through which the devices have been rated and approved for a "T" reliability level. The Mil-PRF-55342 Thin Film resistors were verified in qualification for the American Society for Testing and Materials (ASTM E-595) standard test method for total mass loss (TML) and collected volatile condensable materials (CVCM) from outgassing in a vacuum environment for space-level requirements. In addition, the resistors undergo a burn-in period prior to shipment.

Intended for high-reliability military and aerospace applications with stringent performance requirements, the resistors' all-sputtered wraparound terminations ensure excellent adhesion and dimensional uniformity. The Mil-PRF-55342 Thin Film devices feature a passivated Nichrome resistive element, while their high-purity alumina substrate allows for high power ratings to 500 mW. In addition to very low noise of less than – 25 dB and a low voltage coefficient of < 0.1 ppm/V, the resistors offer an absolute TCR down to ± 25 ppm/°C, tolerances down to 0.1 %, and a resistance range from 10 Ω to 1.69 MΩ depending on case size and characteristics. The Mil-PRF-55342 Thin Film devices provide a shelf-life stability of ± 0.01 % and operate over a temperature range of - 55 °C to + 125 °C. Offered in waffle pack or tape-and-reel packaging, production quantities of the new devices are available now, with lead times of 16 to 20 weeks.