ISOLATED DC/DC CONVERTERS
48 Vdc Input 12 Vdc / 33 A Output
Sep. 03, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
0RQB-Q0T12D
RoHS Compliant
Rev. F
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Basic Isolation
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Low Cost
SCP/OCP
Fixed Frequency (300 kHz)
High Efficiency
Remote On/Off
High Power Density
Over Temperature Protection
Output Over Voltage Protection
Baseplate
Input Under Voltage Lockout
Input Over Voltage Lockout
Description
The 0RQB-Q0T12D 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
Input Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number
Active Low
Voltage
12 Vdc
36 Vdc - 75 Vdc
33 A
400 W
95%
0RQB-Q0T12D
Notes: 1. Add “G” suffix at the end of the model number to indicate Tray Packaging.
2. The part number above indicates RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Parameter
Min
Typ
Max
Notes
Input Voltage (continuous)
-0.3 V
-
75 V
Input voltage Transient protection
Remote On/Off
-
-
-
-
-
-
100V
18 V
Operating for 100mS
-0.3 V
-
I/O Isolation Voltage
1500 V
85 °C
125 °C
Ambient Temperature
Storage Temperature
-40 °C
-55 °C
Note: All specifications are typical at 25 °C unless otherwise stated.
Input Specifications
Parameter
Min
36 V
Typ
48 V
-
Max
75 V
13 A
Notes
Input Voltage
Input Current (full load)
Input Current (no load)
Remote Off Input Current
-
-
-
80 mA
10 mA
150 mA
20 mA
Input Reflected Ripple Current
(pk-pk)
With simulated source impedance of 10
uH, 5 Hz to 20 MHz; use a 100 uF/100 V
electrolytic capacitor with ESR = 1 ohm
max, at 200 kHz.
-
-
20 mA
5 mA
30 mA
Input Reflected Ripple Current
(rms)
10 mA
I2t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
-
-
1 A2S
35.5 V
35 V
33 V
32.5 V
34.5 V
33.5 V
Notes: 1. Should place at least 220uF/100V electrolytic capacitor directly adjacent to the input pin of the module.
2. All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
