Data Sheet

UF20.241
UF
-Series
24V, 20A, 200MS, BUFFER MODULE
Oct. 2016 / Rev. 2.0 DS-UF20.241-EN
All parameters are specified at 24V, 20A, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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12. E
FFICIENCY AND
P
OWER
L
OSSES
Efficiency
Typ. >99% Power supply mode, 20A output current,
capacitors fully charged
Power losses
Typ. 1.9W Power supply mode, 0A output current,
capacitors fully charged
13. L
IFETIME
E
XPECTANCY AND
MTBF
Ca
lculated lifetime expectancy
*)
166 000h
*)
Stand-by mode, 40°C
469 000h
*)
Stand-by mode, 25°C
MTBF
**)
SN 29500, IEC 61709
2 327 000h
Stand-by mode, 40°C
4 219 000h Stand-by mode, 25°C
MTBF
**)
MIL HDBK 217F 398 000h Stand-by mode, 40°C, Ground Benign GB40
624 000h Stand-by mode, 25°C Ground Benign GB25
132 000h Stand-by mode, 40°C, Ground Fixed GF40
195 000h Stand-by mode, 25°C Ground Fixed GF25
*) The calculated 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.
**) 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.