
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302
Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
1
ISOLATED DC/DC CONVERTERS
48 Vdc Input
12 Vdc / 33 A Output
Dec. 10, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Features
Basic Isolation
Low Cost
Fixed Frequency (300 kHz)
SCP/OCP
High Efficiency
Remote On/Off
High Power Density
Over Temperature Protection
Input Under Voltage Lockout
Output Over Voltage Protection
Input Over Voltage Lockout
Baseplate
Applications
Networking
Computers and peripherals
Telecommunications
Description
The 0RQB-Q0T12x is an isolated dc/dc converter that operates from a nominal 48 Vdc source. This unit will
provide up to 400 W of output power from a nominal 48 Vdc input. This unit is designed to be highly efficient and
low cost. Features include remote on/off, over current protection and over voltage protection. The converter is
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 Low
Model Number
Active Low
12 Vdc
36 Vdc - 75 Vdc
33 A
400 W
95%
0RQB-Q0T12D
0RQB-Q0T12F
Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging.
Part Number Explanation
0 R QB – Q0 T 12 x
1 2
3
4
5 6
7
1---Through hole
2---RoHS 6, change “R” to “7” means RoHS 5
3---Series name
4---Series code
5---Input range (36-75V)
6---Output voltage 12V
7---Suffix: “D” indicates 0.154”pin length.
“F” indicates 0.145” pin length and add an extra 6.35mm heatsink.
0RQB-Q0T12x, -D, -F
RoHS Compliant
Rev. H