MTBF
| DC 650V | |
|---|---|---|
MTBF**) SN 29500, IEC 61709
| 373,000h | at 24V, 40A and 40°C |
674,000h | at 24V, 40A and 25°C | |
MTBF**) MIL HDBK 217F
| 145,000h | at 24V, 40A and 40°C; Ground Benign GB40 |
194,000h | at 24V, 40A and 25°C; Ground Benign GB25 | |
31,000h | at 24V, 40A and 40°C; Ground Fixed GF40 | |
| 40,000h | at 24V, 40A and 25°C; Ground Fixed GF25 |
**) MTBF stands for Mean Time Between Failure, which is calculated according to statistical device failures, and indicates reliability of a device. It is the statistical representation of the likelihood of a unit to fail and does not necessarily represent the life of a product.
The MTBF figure is a statistical representation of the likelihood of a device to fail. A MTBF figure of e.g., 1 000 000h means that statistically one unit will fail every 100 hours if 10 000 units are installed in the field. However, it cannot be determined if the failed unit has been running for 50 000h or only for 100h.