
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302
Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
BUS CONVERTERS
48 Vdc Input 11.8 Vdc/25 A Output, 1/8 Brick Bus Converter
Isolated
Input Under-Voltage Lockout
Fixed Frequency
Input Over-Voltage Shutdown
High Efficiency
OCP/SCP
High Power Density
Over Temperature Protection
Low Cost
Remote On/Off
Description
The 0RCR-30S12x are isolated dc/dc converters that operate from a nominal 48 Vdc source. These converter
are intended to provide isolation and step down to generate an intermediate bus for the purpose of powering
non-isolated Point-of-Load (POL) converters. These units will provide up to 300 W of output power from a
nominal 48 Vdc input. This unit is designed to be high efficiency and low cost and are thus unregulated. The
downstream POL converters will provide the precise regulation required by the load. Features include remote
on/off, over current protection and under-voltage lockout. This converter is provided in a 1/8 brick package.
Part Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number
Active Low
Model Number
Active High
11.8 V
48 V
25 A
300 W
96%
0RCR-3012L
0RCR-30S120
Notes: 1. Add “G” suffix at the end of the model number to indicate Tray Packaging.
2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Parameter
Min
Typ
Max
Notes
-0.3 V
-
80 V
Non-operating
Input Voltage (continuous)
-0.3 V
-
57 V
Operating
2 V
-
20 V
Module Off
Remote On/Off (Active Low)
0 V
-
0.4 V
Module On
2 V
-
20 V
Module On
Remote On/Off (Active High)
0 V
-
0.4 V
Module Off
Ambient Temperature
-40
°C
-
85
°C
Storage Temperature
-55
°C
-
125
°C
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
38 V
-
55 V
Input Current (full load)
-
8.5 A
Vin=38 V
Input Current (no load)
-
90 mA
150 mA
Remote Off Input Current
-
8 mA
15 mA
Input Reflected Ripple Current (pk-pk)
-
25 mA
50 mA
Input Reflected Ripple Current (rms)
-
5 mA
10 mA
Tested with simulated source
impedance of 12 uH, 5 Hz to 20 MHz;
use a 100 uF/100 V electrolytic
capacitor and 1 uF/100 V ceramic
capacitor at the input.
I
2t Inrush Current Transient
-
TBD
-
0RCR-30S12x
RoHS Compliant
Rev.D