High-performance thin-film resistors feature 'T' level failure rate for critical applications

Vishay has enhanced its E/H series of precision MIL-PRF-55342-qualified thin-film surface-mount resistor chips to offer a 'T' level failure rate for critical space applications. The QPL devices are qualified to TCR characteristics E, H, K, L, and M in 12 case sizes. The established reliability of the resistors is assured through 100% screening and extensive environmental testing that includes complete 100% Group A power conditioning and Group B lot testing, through which the devices have been rated and approved for a 'T' failure rate level. In addition, the thin film resistors meet the ASTM-E595 requirements for outgassing in a vacuum environment. Intended for satellite and communication applications with stringent performance requirements, the E/H series' all-sputtered wraparound terminations provide exceptional adhesion and dimensional uniformity. The devices feature an electroplated nickel barrier layer for operating conditions to +150C, a TAMELOX resistive element, and a high-purity alumina substrate for high power ratings to 1000mW. In addition to very low noise of less than –25dB and a low voltage coefficient of <0.1ppm/V, E/H series resistors offer an absolute TCR down to ±25ppm/C, laser-trimmed tolerances down to ±0.1%, and a wide resistance range from 10om to 6.19Mohm, depending on case size and TCR characteristics. The devices provide a shelf-life stability of ±0.01% and are offered in antistatic waffle pack or tape-and-reel packaging, says the company.