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Redundancy Power Supply - 24V, 10 A, 240 W, Single-phase Input
Lifetime Expectancy
Mean Time Between Failure
MTBF SN 29500, IEC 61709
MTBF MIL HDBK 217F
14
The Lifetime expectancy that is shown in the table indicates the minimum
operating hours (service life) and is determined by the lifetime expectancy of
the built-in electrolytic capacitors. Lifetime expectancy is specified in
operational hours and is calculated according to the capacitor specifications.
The manufacturer of the electrolytic capacitors only guarantees a maximum
life of up to 15 years (131,400 h). Any number exceeding this value is a calculated
theoretical lifetime that can be used to compare devices.
AC 100V
143,000 h
405,000 h
66,000 h
Lifetime expectancy
188,000 h
37,000 h
105,000 h
Mean Time Between Failure (MTBF), which is calculated according to
statistical device failures, and indicates reliability of a device. It is the
statistical representation of the likelihood of a unit to fail and does not
necessarily represent the life of a product.
The MTBF figure is a statistical representation of the likelihood of a device to
fail. An MTBF figure of, for example, 1,000,000h means that statistically one
unit will fail every 100 hours if 10,000 units are installed in the field. However,
it cannot be determined if the failed unit has been running for 50 000h or only
for 100 h.
For these types of units the MTTF (Mean Time To Failure) value is the same
value as the MTBF value.
AC 100V
AC 120V
535,000 h
556,000 h
972,000 h
1,006,000 h
205,000 h
208,000 h
279,000 h
283,000 h
45,000 h
46,000 h
58,000 h
59,000 h
Rockwell Automation Publication 1606-RM110A-EN-P - July 2020
AC 120V
AC 230V
152,000 h
188,000 h
434,000 h
531,000 h
78,000 h
109,000 h
220,000 h
307,000 h
47,000 h
71,000 h
132,000 h
200,000 h
AC 230V
641,000 h
At 10 A and 40 °C (104 °F)
1,138,000 h
At 10 A and 25 °C (77 °F)
232,000 h
At 10 A and 40 °C (104 °F); Ground Benign GB40
318,000 h
At 10 A and 25 °C (77 °F); Ground Benign GB25
53,000 h
At 10 A and 40 °C (104 °F); Ground Fixed GF40
63,000 h
At 10 A and 25 °C (77 °F); Ground Fixed GF25
At 5 A and 40 °C (104 °F)
At 5 A and 25 °C (77 °F)
At 10 A and 40 °C (104 °F)
At 10 A and 25 °C (77 °F)
At 12 A and 40 °C (104 °F)
At 12 A and 25 °C (77 °F)
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