Oct 8 2010
Vishay Intertechnology, Inc. (NYSE: VSH) today announced that it 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 % screening and extensive environmental testing that includes 100 % 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 less than 0.1 ppm/V, the resistors offer an absolute TCR down to 25 ppm/deg. C, tolerances down to 0.1 %, and a resistance range from 10 ohms to 1.69 megohms 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 to + 125 deg. 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.
Source: http://www.vishay.com/