RELIABLE, LOW COST, STABLE RESISTORS, GENERAL PURPOSE
Abstract
MIL-R-11 70 C load life tests have been completed to 1000 hours on the 100 ohm group. The completed results, on all pertinent resistance values, demonstrates conformance to the MIL-R-11 requirements. The contract requirements of 5% maximum resistance change on the Mil moisture resistance and Resistance- Temperature characteristics of less than 500ppm/degree C have also been met. The moisture load matrix has been completed through 2000 hours on the 100 ohm and 100 kilohm groups. These results definitely indicate smaller resistance changes with increasing load, especially in the 100 kilohm group. The temperature load matrix tests have completed 2000 hours on the 100 ohm group and 3000 hours on the 100 kilohm group. The 10 ohm, 1 kilohm, 10 kilohm, and 39 kilohm groups have completed 6000 hours of testing. The present calculated failure rate, which includes the two early (50 hours of test) failures on the 100 kilohm group, is 0.10%/1000 hours at a confidence level of 60% on units tested at 85 C ambient with 1/4 watt load. The calculated failure rate without the two early failures is no more than 0.03%/1000 hours at a confidence level of 60%. The average resistance change for the 100 ohm and 100 kilohm groups after 2000 hours at 85 C ambient with 1/4 watt load is less than 0.1%; and less than 0.4% on the 10 ohm, 1 kilohm, 10 kilohm, and 39 kilohm groups.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 24, 1965
- Accession Number
- AD0476890
Entities
People
- Sylvester J. Mattie