MTBF

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.

For these device types the MTTF value (Mean Time To Failure) is identical to the MTBF value.

 

AC 100V

AC 120V

AC 230V

 

MTBF

SN 29500,
IEC 61709

430,000h

443,000h

540,000h

At 48V, 10A and +40°C

790,000h

810,000h

973,000h

At 48V, 10A and +25°C

MTBF

MIL HDBK 217F

207,000h

209,000h

244,000h

At 48V, 10A and +40°C
Ground Benign GB40

279,000h

283,000h

334,000h

At 48V, 10A and +25°C
Ground Benign GB25

44,000h

45,000h

54,000h

At 48V, 10A and +40°C,
Ground Fixed GF40

58,000h

59,000h

72,000h

At 48V, 10A and +25°C,
Ground Fixed GF25