20
21
-1
1
20
Power Supply PS1000-A6-24.10
MTBF
13
MTBF
MTBF
stands for
M
ean
T
ime
B
etween
F
ailure, 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 cannot be determined if the failed unit
has been running for 50 000h or only for 100h.
For these types of units the MTTF (
M
ean
T
ime
T
o
F
ailure) value is the same value
as the MTBF value.
AC 100V
AC 120V
AC 230V
MTBF SN 29500, IEC 61709
550 000h
560 000h
661 000h
At 24V, 10A and 40°C
1 003 000h
1 017 000h
1 176 000h At 24V, 10A and 25°C
MTBF MIL HDBK 217F
188 000h
188 000h
213 000h
At 24V, 10A and 40°C;
Ground Benign GB40
252 000h
252 000h
290 000h
At 24V, 10A and 25°C;
Ground Benign GB25
40 000h
40 000h
47 000h
At 24V, 10A and 40°C;
Ground Fixed GF40
51 000h
51 000h
61 000h
At 24V, 10A and 25°C;
Ground Fixed GF25