Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 VDC Input / 140 W Output , 1/8 Brick
• Industry standard eighth-brick package
• Up to 140 W at 95% efficiency
• 1500 V Isolation
• Remote On/Off
• Low Cost
Description
The 0RCR “Cimarron” Serie s are isolated DC/DC converter s that operate from a nominal 48 VDC source. These
converters use a half bridge power train to provide isolation and step down. These units will provide up to 140 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 curren t protection and under voltage lockout. These converters are provided
in an industry standard eighth-brick package.
Part Selection
Output
Voltage Input Voltage Max. Output
Current Max. Output
Power Typical
Efficiency Model Number
Acti ve L ow Model Num b er
Acti ve Hig h
8 V 48 V 18 A 140 W 95% 0RCR-18S08L 0RCR-18S08H
12 V 48 V 12 A 140 W 95% 0RCR-12S12L 0RCR-12S12H
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 seco nd le tter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Parameter Min Typ Max Notes
Input Voltage (continuous) V - V
Remote On/Off 0 V - 60 V
Operating Temperature -40 °C - 85 °C
Non-Operating Temperature -55 °C - 125 °C
Input Specifications
Parameter Min Typ Max Notes
Input Voltage 36 V - 60 V
Input Current (full load) - - 3 A
Input Current (no load) - - 45 mA
Input Reflected Ripple Current (pk-pk) - - 30 mA
Input Reflected Ripple Current (rms) - - 10 mA
Reflected ripple current through a 10uH
source inductor at nominal input
voltage and rated load current.
Note: All specifications are typical at 25 °C unless otherwise stated.
0RCR “Cimarron” Series RoHS Com
p
liant
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 VDC Input / 140 W Output , 1/8 Brick
Output Specifications
Parameter Min Typ Max Notes
Output Voltage Set Point 0RCR-18S080
0RCR-12S120
-
-
Vin / 6
Vin / 4
-
-
Unregulated output will
track input voltage with
a 6:1 or 4:1 ratio.
Output Current 0RCR-18S080
0RCR-12S120
-
-
-
-
18 A
12 A
Load Regulation 0RCR-18S080
0RCR-12S120
-
-
0.5 V
0.7 V
-
-
Ripple and Noise (rms) 0RCR-18S080
0RCR-12S120
-
-
-
-
20 mV
40 mV
Ripple and Noise (pk-pk) 0RCR-18S080
0RCR-12S120
-
-
-
-
110 mV
150 mV
Test conditions:
0 to 20MHz Bandwidth
Use 1.0uF ceramic cap
and 15uF/100mOhm
tantalum on output.
Note: All specifications are typical at 25 °C unless otherwise stated.
General Specifications
Parameter Min Typ Max Notes
Efficiency - 95% - Vin=48 V, Io=Iomax
Switching Frequency 6:1
4:1
-
-
200 kHz
150 kHz
-
-
Over Temperature Protection - °C - Average PCB temperature will not
exceed 115 °C.
MTBF 2,569,594 hours Calculated Per Bell Core SR-332 (IO =
Nominal; Ta = 25 °C)
Dimensions Inches (L × W × H)
Millimeters (L × W × H)
2.30 x 0.9 x 0.39
58.4 x 22.8 x 9.8
Weight - 23 g -
Note: All specifications are typical at 25 °C unless otherwise stated.
Control Specifications
Parameter Min Typ Max Notes
Remote On/Off
Signal Low (Unit On) 0 V - 0.8 V
Signal High (Unit Off) Active Low 2.5 V - 60 V The remote on/off pin open, Unit
on.
Signal Low (Unit Off) 0 V - 0.8 V
Signal High (Unit On) Active High 2.5 V - 60 V The remote on/off pin open, Unit
on.
©
2008 Bel Fuse Inc. Specifications subject to change without notice. 103108
CORPORATE FAR EAST EUROPE
Bel Fuse Inc. Bel Fuse Ltd. Bel Fuse Europe Ltd.
206 Van Vorst Street 8F/ 8 Luk Hop Street Preston Technology Management Centre
Jersey City, NJ 07302 San Po Kong Marsh Lane, Suite G7, Preston
Tel 201-432-0463 Kowloon, Hong Kong Lancashire, PR1 8UD, U.K.
Fax 201-432-9542 Tel 852-2328-5515 Tel 44-1772-556601
www.belfuse.com Fax 852-2352-3706 Fax 44-1772-888366
www.belfuse.com www.belfuse.com
ISOLATED DC/DC CONVE RT ERS
48 Vdc Input / 140 W Output , 1/8 Brick
Mechanical Ouline
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
Pin Connections
Pin Function
1 Vin+
2 Remote On/Off
3 Vin-
4 Vout-
5 Vout+
