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Vishay Intertechnology, Inc. has extended its E/H series of MIL-PRF-55342-qualified thin film surface-mount resistor chips to offer an "S" level failure rate of 0.001 % per 1,000 hours in 12 case sizes. The QPL devices are qualified to TCR characteristics E, H, K, L, and M.
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 an "S" failure rate level.
The Vishay Dale Thin Film MIL-PRF-55342 resistors were verified in qualification to 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.
Intended for high-reliability military and aerospace applications with stringent performance requirements, the E/H series' all-sputtered wraparound terminations ensure excellent adhesion and dimensional uniformity. The MIL-PRF-55342 thin film devices feature an electroplated nickel barrier layer for operating conditions to + 150 °C, a TAMELOX resistive element, and a high-purity alumina substrate for high power ratings to 1000 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, laser-trimmed tolerances down to 0.1 %, and a resistance range from 10 ohms to 6.19 MΩ, depending on case size and TCR characteristics. The MIL-PRF-55342 thin film devices provide a shelf-life stability of ± 0.01 % and are offered in antistatic waffle pack or tape-and-reel packaging.
Samples and production quantities of the new "S" level devices are available now with standard lead times of stock to 10 weeks. Pricing for U.S. delivery is dependent on case size, tolerance, and quantity and ranges from $3.00 to $5.00.