Datasheet

CT5.121
CT-Series
3-PHASE, 12V, 8A, 96W
12. LIFETIME EXPECTANCY
The Lifetime expectancy 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’s manufacturer specification. The manufacturer of the electrolytic capacitors
only guarantees a maximum life of up to 15 years (131 400h). Any number exceeding this value is a calculated
theoretical lifetime which can be used to compare devices.
AC 400V AC 480V
Lifetime expectancy 51 000h 55 000h At 12V, 8A and 40°C
152 000h 147 000h At 12V, 4A and 40°C
144 000h 156 000h At 12V, 8A and 25°C
430 000h 416 000h At 12V, 4A and 25°C
13. MTBF
MTBF stands for Mean Time Between Failure, 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. A MTBF figure of e.g. 1 000 000h
means that statistically one unit will fail every 100 hours if 10 000 units are installed in the field. However, it can not
be determined if the failed unit has been running for 50 000h or only for 100h.
For these types of units the MTTF (Mean Time To Failure) value is the same value as the MTBF value.
AC 400V AC 480V
MTBF SN 29500, IEC 61709 982 000h 976 000h At 12V, 8A and 40°C
1 799 000h 1 769 000h At 12V, 8A and 25°C
MTBF MIL HDBK 217F 484 000h 455 000h At 12V, 8A and 40°C, Ground Benign GB40
634 000h 599 000h At 12V, 8A and 25°C, Ground Benign GB25
105 000h 101 000h At 12V, 8A and 40°C, Ground Fixed GF40
137 000h 132 000h At 12V, 8A and 25°C, Ground Fixed GF25
May 2018 / Rev. 2.0 DS-CT5.121-EN All values are typical figures specified at 400Vac, 50Hz input voltage, 12V, 8A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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