Reference Manual User guide

All parameters are specified at 48V, 5A, 230Vac, 25°C ambient and after a 5 minutes run-in time, unless noted otherwise.
Rockwell Automation Publication 1606-RM045A-EN-P — March 2014 11
Bulletin 1606 Switched Mode Power Supplies
10. Reliability
AC 100V AC 120V AC 230V
Lifetime expectancy
*) 57 000h 67 000h 81 000h at 48V, 5A and 40°C
118 000h 112 000h 118 000h at 48V, 2.5A and 40°C
161 000h*) 188 000h*) 228 000h*) at 48V, 5A and 25°C
MTBF
**) SN 29500, IEC 61709 539 000h 566 000h 606 000h at 48V, 5A and 40°C
932 000h 979 000h 1 048 000h at 48V, 5A and 25°C
MTBF
**) MIL HDBK 217F 342 000h 349 000h 349 000h at 48V, 5A and 40°C; Ground
Benign GB40
467 000h 478 000h 478 000h at 48V, 5A and 25°C; Ground
Benign GB25
*) The Lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by the lifetime
expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specied in operational hours and is calculated according to the
capacitor’s manufacturer specication. The manufacturer of the electrolytic capacitors only guarantees a maximum life of up to 15 years
(131 400h). Any number exceeding this value is a calculated theoretical lifetime which can be used to compare devices.
**) 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 gure is a statistical representation of the likelihood of a device to fail. A MTBF gure of e.g. 1 000 000h means that
statistically one unit will fail every 100 hours if 10 000 units are installed in the eld. However, it is impossible to determine if the failed
unit has been running for 50 000h or only for 100h.