Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 5.0 Vdc/3 A Output
Non-Isolated
Remote On/Off
High Efficiency
Input Under Voltage Lockout
High Power Density
OCP/SCP
Excellent Thermal Performance
Low Cost
UL60950-1 Recognized (UL/cUL)
Description
The Bel xRAH-03Hxx0 is part of the low cost non-isolated dc/dc power converter series. It is packaged in a
compact, overmolded package rated at 3 A. Optional lead forming provides a vertical mount product for minimal
footprint or a surface mount option for a very low profile. The output is closely regulated and the efficiency of 3.3
Vdc output is typically 90% at full load. Typical features include remote on/off, input under voltage lockout, over
current protection and short circuit protection.
Part Selection
Output
Voltage
Input Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Part Number
Surface Mount
Part Number
Vertical Mount
5.0 V
8.0 V - 32 V
3 A
15 W
92%
SRAH-03H500
VRAH-03H500
3.3 V
4.9 V - 32 V
3 A
10 W
90%
SRAH-03H330
VRAH-03H330
2.5 V
4.5 V - 32 V
3 A
7.5 W
88%
SRAH-03H250
VRAH-03H250
1.8 V
4.5 V - 32 V
3 A
5.4 W
85%
SRAH-03H180
VRAH-03H180
1.5 V
4.5 V - 32 V
3 A
4.5 W
83%
SRAH-03H150
VRAH-03H150
1.2 V
4.5 V - 32 V
3 A
3.6 W
81%
SRAH-03H120
VRAH-03H120
Notes:
1. Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel
Packaging”, and “G” for “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
Input Voltage (continuous)
-0.3 V
-
34 V
Output Enable Terminal Voltage
-0.3 V
-
12 V
Ambient Temperature
-40
°C
-
85
°C
Storage Temperature
-40
°C
-
125
°C
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
4.5 V
-
32 V
See “Part Selection” for more details.
Input Current (no load)
-
30 mA
-
Input Current (full load)
-
3 A
Remote Off Input Current
-
4 mA
-
Input Reflected Ripple Current
(pk-pk)
-
200 mA
400 mA
Input Reflected Ripple Current
(rms)
-
100 mA
150 mA
Tested with simulated source impedance of
500 nH, 5 Hz to 20 MHz and two
100 uF/50 V electrolytic capacitors and a 3.3
uF/50 V ceramic capacitor at the input.
I
2t Inrush Current Transient
-
0.02 A
2s
0.1 A
2s
Turn on Voltage Threshold
1
-
4.1 V
4.5 V
Turn off Voltage Threshold
2
-
3.3 V
4.0 V
Notes: 1. The max Turn on Voltage threshold of the 3.3 V & 5.0 V output module will be relaxed to 4.9 V & 8.0 V
respectively.
2. The max Turn off Voltage threshold of the 3.3 V output module will be relaxed to 4.5 V. The 5.0 V output
module does not have such function.
xRAH-03Hxx0 Series
RoHS Compliant
Rev.B