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3.6
MTBF
The following MTBF (Mean Time Between Failure) values were calculated using a combination of manufacturers' test
data, where available, and a Bellcore calculation for the remaining parts. The Bellcore calculation used is ―Method 1
Case 1‖. In that particular method the components are assumed to be operating at a 50% stress level in a 40°C
ambient environment and the system is assumed to have not been burned in. The component manufacturers' data has
been used wherever possible. The manufacturer's data, when used, is specified at 50°C, so in that sense the following
results are slightly conservative. The MTBF values shown below are for a 40°C in an office or telecommunications
environment. Higher temperatures and other environmental stresses (extreme altitude, vibration, salt water
exposure, etc.) lower MTBF values.
»
System MTBF (hours) :
Note:
Fans provided by Kontron have 50,000-hour typical operating life. The above estimates assume a passive
heat sinking arrangement (no fan). Estimated RTC battery life (as opposed to battery failures) is not
accounted for in the above figures and needs to be considered separately. Battery life depends on both
temperature and operating conditions. When the Kontron unit has external power, the only battery drain is
from leakage paths.
14
191717 hours @ 40°C
microETXexpress®-SP / Specification
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