QS20.241, QS20.241-A1, QS20.241-C1
Q-Series
24V, 20A, SINGLE PHASE INPUT
10. LIFETIME EXPECTANCY AND MTBF
AC 100V
54 000h
AC 120V
AC 230V
71 000h
Lifetime expectancy *)
59 000h
143 000h
165 000h *)
441 000h
799 000h
215 000h
at 24V, 20A and 40°C
at 24V, 10A and 40°C
at 24V, 20A and 25°C
at 24V, 20A and 40°C
at 24V, 20A and 25°C
135 000h
153 000h *)
407 000h
749 000h
204 000h
164 000h
200 000h *)
469 000h
840 000h
229 000h
MTBF **) SN 29500, IEC 61709
MTBF **) MIL HDBK 217F
at 24V, 20A and 40°C; Ground
Benign GB40
273 000h
288 000h
308 000h
at 24V, 20A 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 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.
11. FUNCTIONAL DIAGRAM
Fig. 11-1 Functional diagram
Output
Voltage
Regulator
VOUT
+
+
-
-
L
N
Input Fuse
Input Filter
Input Rectifier
Active Inrush Limiter
Output
Filter
Power
Converter
PFC
Converter
Overload
LED
DC-ok
LED
Temper-
ature
Output
Output
Voltage
Monitor
Output
Power
Over-
Voltage
Shut-
Manager
DC-ok
Contact
DC-ok
Relay
down
Protection
Oct. 2013 / Rev. 2.2 DS-QS20.241-EN
All parameters are specified at 24V, 20A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
10/26
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PULS [ PULS GmbH ]
