DC/DC Converter
URB1D_LMD-15WR3 & URB1D_LMD-20WR3 Series
15&20W, Ultra wide input isolated & regulated
DC/DCconverter
FEATURES
Ultra wide input voltage range (4:1)
Enhanced isolation, isolation voltage: 2250VDC
Operating temperature range: -40℃ to +85℃
Input Under-voltage Protection, Output short
circuit, over-current, over–voltage protection
Low ripple & noise
EMI meet EN50121-3-2, without external
components
Meets requirements of railway standard
EN50155
Meet the IEC60950, UL60950, EN60950 approval
Reverse voltage protection available with
A2S(Chassis mounting) or A4S(35mm DIN-Rail
mounting)
International standard pin-out
Patent Protection RoHS
URB1D_LMD-15WR3 series are isolated 15W DC-DC products with 4:1 input voltage. URB1D_LMD-20WR3 series are isolated 20W DC-DC
products with 4:1 input voltage. Their feature efficiency up to 86%, 2250VDC isolation with Enhanced isolation, operating temperature of
-40℃ to +85℃, Input Under-voltage Protection, Output short circuit, over-current, over–voltage protection.Railway vehicle electronic
equipment widely used in 72V, 96V and 110V.
Selection Guide
③
Input Voltage (VDC)
Output
Output Current
Efficiency
(%,Min./Typ.)
@ Full Load
Max. Capacitive
Load(µF)
①
Part No.
Certification
Nominal
Output Voltage
(VDC)
②
Max.
(mA)(Max./Min.)
(Range)
URB1D03LMD-15WR3
URB1D05LMD-15WR3
URB1D12LMD-15WR3
URB1D15LMD-15WR3
URB1D24LMD-15WR3
URB1D03LMD-20WR3
URB1D05LMD-20WR3
URB1D12LMD-20WR3
URB1D15LMD-20WR3
URB1D24LMD-20WR3
3.3
5
4000/0
80/82
82/84
82/84
83/85
83/85
80/82
82/84
83/85
84/86
84/86
5400
5400
1000
820
3000/0
12
15
24
3.3
5
1250/0
1000/0
625/0
270
110
170
--
(40-160)
5000/0
10000
10000
1600
1000
470
4000/0
12
15
24
1667/0
1333/0
833/0
Note:
①Series with suffix “H” are heat sink mounting; series with suffix “A2S” are chassis mounting,with suffix “A4S” are DIN-Rail mounting, for example
URB1D05LMD-20WHR3A2S is chassis mounting of with heat sink, URB1D05LMD-20WR3A4S is DIN-Rail mounting of without heat sink; If the application has a
higher requirement for heat dissipation, you can choose modules with heat sink;
②Absolute maximum rating without damage on the converter, but it isn't recommended;
③Efficiency is measured In nominal input voltage and rated output load;A2S (wiring) and A4S (rail) Model due to input reverse polarity protection, minimum
efficiency greater than Min.-2 is qualified.
Input Specifications
Item
Operating Conditions
Min.
Typ.
Max.
Unit
mA
3.3V output
5V output
Others
--
--
--
147/10
163/10
159/3
150/20
167/20
166/8
URB1D_LMD-15WR3 series,
Nominal input voltage
Input Current (full load /
no-load)
3.3V output
--
183/10
188/20
URB1D_LMD-20WR3 series,
Nominal input voltage
5V output
Others
--
--
--
217/10
214/3
25
222/20
219/8
--
Reflected Ripple Current
Nominal input voltage
2016.11.03-A/0
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