The following table includes mean time between failures (MTBF) information for the 8520 Series switches.
| Switch Model | Mean Time Between Failures |
|---|---|
| 8520-48Y-8C-AC-F | 471,550 hrs @ 25°C 178,775 @ 50°C |
| 8520-48Y-8C-AC-R | 520,479 hrs @ 25°C 255,358 @ 45°C |
| 8520-48Y-8C-DC-F | 471,560 hrs @ 25°C 178,776 @ 50°C |
| 8520-48Y-8C-DC-R | 520,491 hrs @ 25°C 255,361 @ 45°C |
| 8520-48XT-6C-AC-F | 439,148 hrs @ 25°C 187,306 @ 50°C |
| 8520-48XT-6C-AC-R | 421,453 hrs @ 25°C 176,924 @ 45°C |
| 8520-48XT-6C-DC-F | 439,156 hrs @ 25°C 187,308 @ 50°C |
| 8520-48XT-6C-DC-R | 421,461 hrs @ 25°C 176,926 @ 45°C |