Technical data, mounting, wiring
PS1011-2410-0000
17
Version: 1.0
3.8
Lifetime expectancy and MTBF
The lifetime expectancy shown in the table indicates the minimum number of operating hours (service life)
and is determined by the lifetime expectancy of the built-in electrolytic capacitors. The lifetime expectancy is
stated in operating hours and is calculated according to the specifications of the capacitor manufacturer.
The manufacturer of the electrolytic capacitors only guarantees a maximum life of up to 15 years (131,400h).
Any number exceeding this value represents a calculated theoretical lifetime which can be used to compare
devices.
AC 100V
AC 120V
AC 230V
Lifetime
expectancy
89,000h
93,000h
103,000h
At 24V, 5A and +40°C
252,000h
262,000h
291,000h
At 24V, 5A and +25°C
47,000h
55,000h
74,000h
At 24V, 10A and +40°C
133,000h
156,000h
209,000h
At 24V, 10A and +25°C
MTBF stands for
M
ean
T
ime
B
etween
F
ailure, which is calculated from the statistical failure rate of the
components and indicates the reliability of a device. It is a statistical representation of the probability of
equipment failure and does not necessarily represent the service life of a product.
The MTBF number is a statistical representation of the probability of equipment failure. An MTBF number of
1,000,000h, for example, means that statistically, if there are 10,000 devices in use, one device will fail every
100 hours. However, it is not possible to say whether the failed device has been in operation for 50,000
hours or only 100 hours.
AC 100V
AC 120V
AC 230V
MTBF SN 29500,
IEC 61709
655,000h
736,000h
822,000h
At 24V, 10A and 40°C
1,149,000h
1,267,000h
1,391,000h At 24V, 10A and +25°C
MTBF MIL HDBK
217F
323,000h
345,000h
374,000h
At 24V, 10A and 40°C; Ground Benign GB40
441,000h
471,000h
508,000h
At 24V, 10A and 25°C; Ground Benign GB25
72,000h
78,000h
85,000h
At 24V, 10A and 40°C; Ground Fixed GF40
94,000h
101,000h
111,000h
At 24V, 10A and 25°C; Ground Fixed GF25