Data Sheet

QS40.241
Q-Series
24V, 40A, SINGLE PHASE INPUT
13. LIFETIME EXPECTANCY AND MTBF
AC 100V AC 120V AC 230V
Calculated lifetime expectancy
*)
288 000h
*)
291 000h
*)
317 000h
*)
at 24V, 20A and 25°C
102 000h 103 000h 112 000h at 24V, 20A and 40°C
163 000h
*)
181 000h
*)
238 000h
*)
at 24V, 40A and 25°C
57 000h 64 000h 84 000h at 24V, 40A and 40°C
MTBF
**)
SN 29500, IEC 61709 491 000h 481 000h 537 000h at 24V, 40A and 25°C
274 000h 269 000h 300 000h at 24V, 40A and 40°C
MTBF
**)
MIL HDBK 217F
Ground Benign
170 000h 171 000h 183 000h at 24V, 40A and 25°C;
Ground Benign GB25
126 000h 127 000h 137 000h at 24V, 40A and 40°C;
Ground Benign GB40
MTBF
**)
MIL HDBK 217F
Ground Fixed
36 000h 36 000h 39 000h at 24V, 40A and 25°C;
Ground Fixed GF25
27 000h 27 000h 30 000h at 24V, 40A and 40°C;
Ground Fixed GF40
*) The calculated 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 specified in operational hours and is calculated according
to the capacitor’s manufacturer specification. 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 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 can not be determined if the failed unit
has been running for 50 000h or only for 100h.
14. FUNCTIONAL DIAGRAM
Fig. 14-1 Functional diagram
+
+
-
-
V
OUT
DC-ok
Contact
Output
Over-
Voltage
Protection
Bridgeless
PFC
Converter
Input Fuse
Input Filter
Inrush Limiter
Output
Voltage
Regulator
Power
Converter
Output
Filter
DC ok
Relay
Output
Voltage
Monitor
Output
Power
Manager
Temper-
ature
Shut-
down
Overload
LED
DC-ok
LED
N
L
Single /
Parallel
Shut-down
Input &
Remote
Control
Shut-
down
13
14
15
16
Event Datalogger
Oct. 2014 / Rev. 1.2 DS-QS40.241-EN
All parameters are specified at 24V, 40A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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