Life expectancy

 

AC 100 V

AC 120 V

AC 230 V

 

Calculated life expectancy1)

299,000 h1)

305,000 h1)

327,000 h1)

At 48 V, 10 A and +25°C

106,000 h

108,000 h

116,000 h

At 48 V, 10 A and +40°C

180,000 h1)

193,000 h1)

253,000 h1)

At 48 V, 20 A and +25°C

64,000 h

68,000 h

90,000 h

At 48 V, 20 A and +40°C

MTBF2) SN 29500, IEC 61709

491,000 h

481,000 h

537,000 h

At 48 V, 20 A and +25°C

274,000 h

269,000 h

300,000 h

At 48 V, 20 A and +40°C

MTBF2) MIL HDBK 217F
Ground Benign

170,000 h

171,000 h

183,000 h

At 48 V, 20 A and +25°C; Ground Benign GB25

126,000 h

127,000 h

137,000 h

At 48 V, 20 A and +40°C; Ground Benign GB40

MTBF2) MIL HDBK 217F
Ground Fixed

36,000 h

36,000 h

39,000 h

At 48 V, 20 A and +25°C; Ground Fixed GB25

27,000 h

27,000 h

30,000 h

At 48V, 20A and +40°C; Ground Fixed GF40

1) The calculated life expectancy shown in the table indicates the minimum number of operating hours (service life) and is determined by the life expectancy of the built-in electrolytic capacitors. The life 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 (131,400 h). Any number exceeding this value represents a calculated theoretical lifetime which can be used to compare devices.

2) MTBF stands for Mean Time Between Failure, which is calculated on the basis of statistical equipment failures and indicates the reliability of a device. It is the statistical representation of the probability of failure of a device and does not necessarily represent the service life of a product.
The MTBF number is a statistical representation of the probability of equipment failure. For example, an MTBF number of 1,000,000 h means that statistically, if 10,000 devices are installed in the field, one device will fail every 100 hours. However, it is not possible to determine whether the failed device has run for 50,000 hours or only 100 hours.