SOTA maintains the established reliability rating of our thick film MIL-PRF-55342 resistors at level S (0.001% / 1,000 hours) and maintains our thin film MIL-PRF-55342 resistors at level R (0.01% / 1,000 hours). SOTA performs >70 million unit hours of life testing in order to maintain these failure rates.

A life test failure is defined as a change in resistance value larger than 2.0% for failure rate maintenance and 0.5% for qualification.

These life tests are performed at 70C ambient at maximum operating voltage applied for 90 minutes on, 30 minutes off, for 10,000 hours.

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