LR Series
240 300 Watt AC-DC and DC-DC Converters
The LR Series of AC-DC converters represents versatile power
supplies ideally suitable for use in advanced electronic systems.
Features include full power factor correction, good hold-up time,
high efficiency and reliability, low output noise, and excellent
dynamic response to load/line changes.
The converter inputs are protected against surges and transients.
An input over- and undervoltage lockout circuitry disables the
outputs if the input voltage is outside of the specified range. Input
inrush current limitation is included to prevent circuit breakers
and fuses from tripping at switch-on.
The outputs are open- and short-circuit proof.
Full input-to-output, input-to-case, output-to-case, and output to
output isolation is provided. Particularly the outputs exhibit an
extended insulation to the case.
111
4.4"
3 U
Features
60
168
Class I equipment
2.4"
6.6"
12 TE
Universal AC input voltage range with PFC and DC input
Inrush current limitation
2 isolated, adjustable outputs
111
No load, overload, and short-circuit proof
4.4"
1113 U
Rectangular current limiting characteristic with flexible
4.4"
3 U
load distribution
80
168
3.2"
Inhibit function
6.6"
6016 TE
168
2.4" Parallel operation with active current sharing
6.6"
12 TE
Interruption time 20 ms
Immunity according to EN 61000-4-2, -3, -4, -5, -6, -8
RoHS-compliant
111
Fire & smoke according to EN 45545
4.4"
3 U
All PCB boards protected by lacquer
Very high reliability
80
168
3.2"
6.6"
5 year warranty
16 TE
AREMA compliant
Safety-approved to the latest edition of IEC/EN 62368-1
and UL/CSA 62368-1
1 1
1
for AC input only
Table of Contents
Description........................................................................................1 Electromagnetic Compatibility (EMC) .............................................12
Model Selection ................................................................................2 Immunity to Environmental Conditions ...........................................14
Functional Description ......................................................................3 Mechanical Data .............................................................................16
Electrical Input Data .........................................................................4 Safety and Installation Instructions .................................................19
Electrical Output Data.......................................................................5 Description of Options ....................................................................20
Auxiliary Functions ...........................................................................9 Accessories ....................................................................................21
belfuse.com/power-solutions
BCD.00580 Rev AF, 26-Jul-2019LR Series
240 300 Watt AC-DC and DC-DC Converters
Description
All PCB boards are coated with a protective lacquer.
The case design allows for operation at nominal load up to 71 C with natural cooling. If forced cooling is provided, the ambient
temperature may exceed 71 C, but the case temperature must remain below 95 C.
A temperature sensor generates an inhibit signal, which disables the outputs when the case temperature T exceeds the limit. The
C
outputs are automatically re-enabled when the temperature drops below the limit.
LED indicators display the status of the converter and allow for visual monitoring of the system at any time.
The converters can either be plugged into a 19 rack system according to IEC 60297-3, or be chassis mounted. Two heat sinks of
different size and cooling plates for chassis mounting (option B, B1) are available.
Model Selection
Table 1: Model selection
Output 1 Output 2 Power Operating Input Voltage Efficiency Model Options
1 2
V I V I P V
110 230
o nom o nom o nom o nom o nom i cont
[V] [A] [V] [A] [W]
min [%] typ [%] min [%] typ [%]
12 10 12 10 240 90 91 90 92 LR2320-9
90 264 VAC
12 12.5 12 12.5 300 90 91 90 92 LRP2320-9
F0, F2,
125 300 VDC
B, B1
15 8 15 8 240 90 91 90 92 LR2540-9
15 10 15 10 300 90 91 90 92 LRP2540-9
1
Efficiency at T = 25 C, V = 110 VAC, I , V
A i o nom o nom
2
Efficiency at T = 25 C, V = 230 VAC, I , V
A i o nom o nom
Part Number Description
LR 2 3 20 -9 B1
Operating input voltage V (continuously):
i cont
90 264 VAC, 125 300 VDC ........................ LR, LRP
Number of outputs ................................................................2
Nominal voltage of main output V
o1 nom
12 V .............................................................................3
15 V .............................................................................5
1
Other voltages ......................................................1 - 9
2
Nominal voltage of tracking output V
o2
12 V .............................................................................20
15 V .............................................................................40
1
Other specifications or additional features ....... 11 99
Operational temperature range: T :
A
T = 40 to 71 C, T 95 C ......................................-9
A C
1
Other ............................................................... -0, -5, -6
Auxiliary functions and options:
Fuse options ......................................................... F0, F2
Cooling plate standard case ...................................B, B1
1
Customer-specific models. No safety-relevant changes compared to the respective basic model, e.g. different mechanical details, special
markings, mounted front plates, reduced output voltage, etc.
2
The nominal voltages of both outputs are always equal.
Note: The sequence of options must follow the order above.
Example: LR2320-9B1: AC-DC converter, operating input voltage range 90 to 264 VAC, 2 isolated outputs, each providing 12 V,
10 A, cooling plate B1, RoHS-compliant for all six substances.
Product Marking
Basic type designation: applicable approval marks, CE mark, warnings, pin designation, patents and company logo, identification of LEDs.
Specific type designation: input voltage range, nominal output voltages and currents, degree of protection, batch no., serial no., and
data code including production site, modification status, and date of production.
tech.support@psbel.com
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BCD.00580 Rev AF, 26-Jul-2019
2019 Bel Power Solutions & Protection Page 2 of 22