RDC40 Series
DC-DC Power Supplies
XP Power
40 Watts
• 72 & 110 VDC Input for Railway Applications
• Single and Dual Outputs
• 1500 VAC Basic Isolation
• High Efficiency - Up to 90%
• Remote On/Off
• Complies with EN50155
• EN50121-3-2 EMC for Railway Applications
• 3 Year Warranty
Dimensions:
The RDC40 series of 40W DC-DC converters are designed for railway applications and comply
with EN50121-3-2, the EMC standard for rolling stock apparatus. There are two input voltage
ranges. The 72 VDC nominal models accept an input from 36 to 140 VDC and the 110 V
nominal versions have a 55 to 176 VDC input. A trim pin allows a +/-10% adjustment for
single output models. Using convection cooling the converters have a wide operating
temperature range of -40°C to +85°C and a maximum case temperature of 105°C.
RDC40:
2.00 x 1.60 x 0.4” (50.8 x 40.6 x 10.16 mm)
Models & Ratings
Input Voltage
Output Voltage
36-140 VDC
55-176 VDC
Output Current
3.3 V
5.0 V
12.0 V
15.0 V
±12.0 V
±15.0 V
3.3 V
5.0 V
12.0 V
15.0 V
±12.0 V
±15.0 V
10.00
8.00
3.35
2.65
±1.65
±1.35
10.00
8.00
3.35
2.65
±1.65
±1.35
A
A
A
A
A
A
A
A
A
A
A
A
Input Current(1)
No Load
Full Load
30 mA
526.82 mA
30 mA
617.28 mA
25 mA
641.76 mA
25 mA
627.37 mA
30 mA
632.18 mA
30 mA
639.20 mA
20 mA
344.83 mA
25 mA
408.58 mA
25 mA
420.06 mA
25 mA
410.64 mA
20 mA
413.79 mA
20 mA
420.78 mA
Maximum
Capacitive Load
25000
2000
2500
2500
±1600
±1600
25000
2000
2500
2500
±1600
±1600
μF
μF
μF
μF
μF
μF
μF
μF
μF
μF
μF
μF
Efficiency
87.0%
90.0%
87.0%
88.0%
87.0%
88.0%
87.0%
89.0%
87.0%
88.0%
87.0%
87.5%
Model Number(2)
RDC4072S3V3
RDC4072S05
RDC4072S12
RDC4072S15
RDC4072D12
RDC4072D15
RDC40110S3V3
RDC40110S05
RDC40110S12
RDC40110S15
RDC40110D12
RDC40110D15
Notes
1. Input current specified at nominal 72 V or 110 V input.
2. Add suffix ‘-HK’ for optional heatsink.
Input
Characteristic
Input Voltage - Operating
Minimum
Typical
36
55
Maximum
Units
Notes & Conditions
140
176
VDC
72 V nominal
110 V nominal
Input Current
See models and ratings table
Input Reflected Ripple
20
mA
Input Filter
Undervoltage Lockout
Input Surge
Through 12 μH inductor and 33 μF capacitor
Pi network
OFF: 30.5
OFF: 48.5
ON: 33.5 V
ON: 52.5 V
V
150
185
VDC
www.xppower.com
72 V models
110 V models
72 V models (for 100 ms)
110 V models (for 100 ms)
RDC40 Series
DC-DC Power Supplies
XP Power
Output
Characteristic
Min.
Typ.
Max.
Units
Notes & Conditions
VDC
See Models and Ratings table
%
On single outputs models only
Output Voltage
Output Voltage Trim
Minimum Load
±10
0
A
Line Regulation
±0.2
%
Load Regulation
±0.5
±1.0
%
Single output models
Dual output models (balanced outputs)
%
Dual output models, when one load is varied between 25% and 100% and the other
is fixed at 100%
Cross Regulation
±5
Setpoint Accuracy
±1
%
Start Up Time
30
ms
Single output models
Dual output model
Measured with 20 MHz bandwidth in parallel with 1 μF ceramic capacitor across
output rails
100
150
mV pk-pk
mV pk-pk
4
%
Deviation, recovery to within 1% in 3.0) or Open
Off = Logic Low (
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