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, 12 Vdc/8.35 A, 5 Vdc/20 A, 3.3 Vdc/25 A, 1.2-2.5 Vdc/30 A Outputs
• Isolated • Output Over Voltage Shutdown
• High Efficiency • OCP/SCP
• High Power Density • Over Temperature Protection
• Low Cost • Remote On/Off
• Input Under Voltage Lockout • Output Voltage Trim
• Fixed Frequency (285 kHz)
• Input Over Voltage Lockout
• Active Low/High (Option)
• Positive/Negative Remote Sense
• Basic Isolation
• Safety Approval to UL60950-1
(UL/cUL)
Description
The 0RQB-C0U Series are isolated dc/dc converters that operate from a nominal 48 Vdc source. These units
will provide up to 100 W of output power from a nominal 48 Vdc input. These units are designed to be highly
efficient and low cost. Typical efficiency of 12 Vdc output at 48 Vdc input at full load is 91%. 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
Active High Model Num b er
Active Low
12 Vdc 18 Vdc - 75 Vdc 8.35 A 100 W 91% 0RQB-C0U120 0RQB-C0U12L
5.0 Vdc 18 Vdc - 75 Vdc 20 A 100 W 90% 0RQB-C0U050 0RQB-C0U05L
3.3 Vdc 18 Vdc - 75 Vdc 25 A 82.5 W 90% 0RQB-C0U033 0RQB-C0U03L
2.5 Vdc 18 Vdc - 75 Vdc 30 A 75 W 89.5% 0RQB-C0U025 0RQB-C0U02L
1.8 Vdc 18 Vdc - 75 Vdc 30 A 54 W 85% 0RQB-C0UV80 0RQB-C0UV8L
1.5 Vdc 18 Vdc - 75 Vdc 30 A 45 W 83% 0RQB-C0UV50 0RQB-C0UV5L
1.2 Vdc 18 Vdc - 75 Vdc 30 A 36 W 80% 0RQB-C0UV20 0RQB-C0UV2L
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 No Operating
Input Voltage (continuous) - - 75 V Operating
Remote On/Off -0.3 V - 18 V
I/O Isolation Voltage - - 2000 V
Ambient Temperature -40 °C - 85 °C
Storage Temperature -55 °C - 125 °C
Note: All specifications are typical at nominal input, full load at 25 °C unless noted.
0RQB-C0U Series RoHS Com
liant PRELIMINARY Rev.A