20
21
-1
1
24
Power Supply PS1000-A6-24.5
MTBF
16
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 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 (
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
800 000h
807 000h
867 000h
At 24V, 5A and 40°C
1 402 000h
1 414 000h
1 510 000h At 24V, 5A and 25°C
MTBF MIL HDBK 217F
339 000h
343 000h
368 000h
At 24V, 5A and 40°C;
Ground Benign GB40
490 000h
496 000h
529 000h
At 24V, 5A and 25°C;
Ground Benign GB25
81 000h
83 000h
89 000h
At 24V, 5A and 40°C;
Ground Fixed GF40
109 000h
111 000h
119 000h
At 24V, 5A and 25°C;
Ground Fixed GF25
