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Aug 12 2003, 10:13 AM
Joined: 23-May 03
From: Plano, Texas
Member No.: 4
MTBF criteria was developed by the military to predict life expectancy/reliability for electronic equipment and as such use certain values for component failure rates. These component values are often misleading when applied to industrial/commercial electronics due to the large diversity of applications. This is particularly true in the case of solid-state relays and I/O modules. Actual applications of the products alter the MTBF calculations significantly. e.g.: Power dissipation of modules can be significantly different in the on-state versus the off-state; Duty cycle can vary from 1% to 100%, ect.
Crouzet does not publish specific MTBF figures for its modules due to the varied nature of applications. However, a range of MTBF figures, that is worst case to best case, can be estimated by theoretical means:
Best case is around 40 million HRS
Worst case is around 2 million HRS
Field data suggest these figures are pessimistic. Actual PPM rates are typically less than 50 PPM depending on hours of service. Actual MTBF can be greater than 2 million HRS
Visit our website at www.crouzet-ssr.com for additional product and company information.
Time is now: 21st May 2013 - 10:40 AM