ISOLATED DC/DC CONVERTERS
48 VDC Input 12 VDC/20 A Output, 1/4 Brick
0RCM-20S/30S Series
RoHS Compliant
PRELIMINARY
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Industry standard quarter-brick package
Up to 240 W at 96% efficiency
1500 V isolation
Remote on/off
Low cost
Safety Agency Approvals
Description
The 0RCM-20S/30S “Cimarron” Series are isolated DC/DC
converters that operate from a nominal 48 VDC source.
These converters use a full bridge power train to provide isolation and step down. These units will provide up to
240 W of output power from a nominal 48 VDC input. These units are designed to be highly efficient and low cost.
Features include remote on/off, over current protection and under voltage lockout. These converters are provided
in an industry standard quarter-brick package.
Part Selection
Output Voltage
Input Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number
12 V
8 V
48 V
48 V
20 A
30 A
240 W
240 W
96%
96%
0RCM-20S12L
0RCM-30S08L
Notes: 1. Change last character in part number from “L” to “H” for Active High On/Off Logic (e.g. 0RCM-20S12H).
2. Add “G” suffix at the end of the model number to indicate Tray Packaging.
3. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Input Specifications
Parameter
Input Voltage Range
Input Current (no load)
Input Current (full load)
Min
36 V
Typ
48 V
Max
55 V
Notes
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-
80 mA
5.3 A
Reflected ripple current through a 12
uH source inductor at nominal input
voltage and rated load current.
Reflected Ripple Current(pk-pk)
Reflected Ripple Current(rms)
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-
-
-
100 mA
50 mA
Output Specifications
Parameter
Output Voltage
0RCM-20S12x
Min
36 Vin
8.8 V
5.8 V
Typ
48 Vin
12.0 V
8.0 V
Max
55 Vin
14.0 V
9.4 V
Notes
Setpoint at no load.
0RCM-30S08x
Output Current
0RCM-20S12x
0RCM-30S08x
0 A
0 A
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-
20 A
30 A
Load Regulation
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-
5%
0 to 20 MHz BW, use 1.0 uF
ceramic cap and 15 uF/100 m ohm
tantalum cap at the output.
Ripple and Noise (pk-pk)
-
-
100 mV
Ripple and Noise (rms)
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-
45 mV
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
