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Rockwell Automation Publication 1606-RM110A-EN-P - July 2020
Redundancy Power Supply - 24V, 10 A, 240 W, Single-phase Input
Lifetime Expectancy
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.
Mean Time Between Failure
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
AC 230V
Lifetime expectancy
143,000 h
152,000 h
188,000 h
At 5 A and 40 °C (104 °F)
405,000 h
434,000 h
531,000 h
At 5 A and 25 °C (77 °F)
66,000 h
78,000 h
109,000 h
At 10 A and 40 °C (104 °F)
188,000 h
220,000 h
307,000 h
At 10 A and 25 °C (77 °F)
37,000 h
47,000 h
71,000 h
At 12 A and 40 °C (104 °F)
105,000 h
132,000 h
200,000 h
At 12 A and 25 °C (77 °F)
AC 100V
AC 120V
AC 230V
MTBF SN 29500, IEC 61709
535,000 h
556,000 h
641,000 h
At 10 A and 40 °C (104 °F)
972,000 h
1,006,000 h
1,138,000 h
At 10 A and 25 °C (77 °F)
MTBF MIL HDBK 217F
205,000 h
208,000 h
232,000 h
At 10 A and 40 °C (104 °F); Ground Benign GB40
279,000 h
283,000 h
318,000 h
At 10 A and 25 °C (77 °F); Ground Benign GB25
45,000 h
46,000 h
53,000 h
At 10 A and 40 °C (104 °F); Ground Fixed GF40
58,000 h
59,000 h
63,000 h
At 10 A and 25 °C (77 °F); Ground Fixed GF25