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X Series Data Sheet
?
375, 500 Watt AC-DC and DC-DC DIN-Rail Converters
Table 4: P o derating according to UL 60950 at T A = 60 °C, or according to UL 508 at T out = 50 °C
Model
P o nom
T C max
Derate below
derate by
[W]
[°C]
V i [VAC]
V i [VDC]
[W/V]
LXR1601-6
LXR1701-6
LXR1801-6
LXN1601/2660-6
LXN1701-6
LXN1801/2880-6
371
370
371
494
496
494
84
84
84
84
84
84
125
125
125
125
125
125
115
115
115
115
115
115
– 1.8
– 1.8
– 1.8
–2.5
–2.5
–2.5
Table 5: P o derating according to UL 60950 at T A = 50 °C, or according to UL 508 at T out = 40 °C
Model
P o nom
T C max
Derate below
derate by
[W]
[°C]
V i [VAC]
V i [VDC]
[W/V]
LXR1601-6
LXR1701-6
LXR1801-6
LXN1601/2660-6
LXN1701-6
LXN1801/2880-6
371
370
371
494
496
494
78
78
78
78
78
78
100
100
100
100
100
100
no derating
no derating
no derating
no derating
no derating
no derating
– 1.5
– 1.5
– 1.5
–2
–2
–2
Output Power Derating
The output power of LX models must be decreased at low
input voltage and/or powertrain temperature above 125 °C.
The powertrain temperature depends on the output power,
the input voltage, and the cooling method. At low input voltage
the losses increase. At the maximum specified environment
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
temperature T A free air convection cooling might be
insufficient. As a result, the output power has to be reduced
according to the tables 4 and 5.
Note: The measurements have been made at the approval tests
with free air convection cooling according to UL 60950, specified
ambient temperature T A , and with the converter built in a
cardboard box according to UL 508 and a specified temperature
outside the box T out . The tables give a correlation between T A or
T out and the case temperature T C (measuring point T C see
Mechanical Data ). For models not specified, please contact
Power-One.
Input Fuse and Protection
η [%]
90
80
70
60
04068a
A slow blow fuse ( Schurter T 10A, 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 .
50
0
0.2 0.4
V i = 125 V rms
0.6
I o
0.8 1 I o nom
V i = 230 V rms
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.
Fig. 3
Efficiency versus load
BCD20021-G Rev AC1, 13-May-2013
Page 6 of 21
www.power-one.com
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