Technical data, mounting, wiring
PS1011-2410-0000 17Version: 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 Mean Time Between Failure, 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
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