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BCD20021-G Rev AF, 29 November 2021
Page 7 of 26
X Series
375, 500 Watt AC-DC and DC-DC DIN-Rail Converters
© 2021 Bel Power Solutions & Protection
Table 5: P
o
derating according to UL 60950-1 at T
A
= 50 °C, or according to UL 508 at T
out
= 40 °C
Model
P
o nom
[W]
T
C max
[
°
C]
Derate below
Derate by
V
i
[VAC]
V
i
[VDC]
[W/V]
LXR1601-6
371
78
100
no derating
- 1.5
LXR1701-6
371
78
100
no derating
- 1.5
LXR1801-6
371
78
100
no derating
- 1.5
LXN1601/2660-6
494
78
100
no derating
- 2
LXN1701-6
497
78
100
no derating
- 2
LXN1801/2880-6
494
78
100
no derating
- 2
Input Fuse and Protection
A slow blow fuse (Schurter T10A, 5
×
20 mm), protected by a sleeve, is connected in the line input. For DC input voltages above
250 V an external DC fuse or a circuit breaker must be installed; observe the
Installation Instructions
.
Converters with option F have 2 fuses, one in each input line. The D C input voltage for all converters with option F is limited to 250 V.
A VDR and a symmetrical input filter form an effective protection against input transients.
An under- and overvoltage lockout protects the converter by disabling it below
V
i
min
and above
V
i max
.
The built-in bridge rectifier provides reverse polarity protection at the input if operated from DC.
Efficiency
0
0.2
0.4
0.6
0.8
1
50
70
60
80
90
η
[%]
I
o
I
o nom
V
i
= 125 V
rms
V
i
= 230 V
rms
04068a
Fig. 3
Efficiency versus load