Technical data, mounting, wiring
PS2001-2410-0000
18
Version: 1.0
3.8
Lifetime expectancy
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
128,000h
141,000h
176,000h
At 24V, 5A and +40°C
61,000h
75,000h
120,000h
At 24V, 10A and +40°C
47,000h
59,000h
101,000h
At 24V, 12A and +40°C
363,000h
399,000h
499,000h
At 24V, 5A and +25°C
173,000h
211,000h
338,000h
At 24V, 10A and +25°C
132,000h
166,000h
286,000h
At 24V, 12A and +25°C
3.9
MTBF
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.
For these device types the MTTF value (
M
ean
T
ime
T
o
F
ailure) is identical to 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
