Data Sheet

QS20.241, QS20.241-A1, QS20.241-C1
Q-Series
24V, 20A, SINGLE PHASE INPUT
10. LIFETIME EXPECTANCY AND MTBF
AC 100V AC 120V AC 230V
Lifetime expectancy
*) 54 000h 59 000h 71 000h at 24V, 20A and 40°C
135 000h 143 000h 164 000h at 24V, 10A and 40°C
153 000h *) 165 000h *) 200 000h *) at 24V, 20A and 25°C
MTBF
**) SN 29500, IEC 61709 407 000h 441 000h 469 000h at 24V, 20A and 40°C
749 000h 799 000h 840 000h at 24V, 20A and 25°C
MTBF
**) MIL HDBK 217F 204 000h 215 000h 229 000h 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
Over-
Voltage
Protection
PFC
Converter
Output
Voltage
Regulator
Power
Converter
Output
Filter
DC-ok
Relay
Output
Voltage
Monitor
Output
Power
Manager
Temper-
ature
Shut-
down
Input Fuse
Input Filter
Input Rectifier
Active Inrush Limiter
V
OUT
L
N
DC-ok
Contact
Overload
LED
DC-ok
LED
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.
www.pulspower.com Phone [phone] Germany
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