
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 CONVERTERS
48 Vdc Input 1.2 Vdc - 12 Vdc / 25 A - 5 A Outputs, 1/16 Brick
Isolated
Fixed Frequency (600 kHz)
High Efficiency
High Power Density
Low Cost
Output Voltage Trim
Basic Insulation
UL60950-1 Recognized (UL/cUL)
Input Under Voltage Lockout
Output Over Voltage Shutdown
OCP/SCP
Over Temperature Protection
Remote On/Off (option)
Positive/Negative Remote Sense
Through Hole and SMT (option)
Description
The xRSB-50T series are isolated dc/dc converters that operate from a nominal 48 Vdc source. These units will
provide up to 60 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 current protection and under voltage lockout. These converters
are provided in an industry standard sixteenth brick package.
Part Selection
Output
Voltage
Voltage
Current
Power
1.2 V
36 V - 75 V
25 A
30 W
Input
Max. Output
Max. Output
Typical
Efficiency
84%
Model Number
Active Low
xRSB-50TV2L
Model Number
Active High
xRSB-50TV20
1.5 V
36 V - 75 V
22 A
33 W
85%
xRSB-50TV5L
xRSB-50TV50
1.8 V
36 V - 75 V
20 A
36 W
87%
xRSB-50TV8L
xRSB-50TV80
2.5 V
36 V - 75 V
18 A
45 W
87%
xRSB-50T02L
xRSB-50T025
3.3 V
36 V - 75 V
15 A
50 W
89%
xRSB-50T03L
xRSB-50T033
5.0 V
36 V - 75 V
12 A
60 W
90%
xRSB-50T05L
xRSB-50T050
12 V
36 V - 75 V
5 A
60 W
89%
xRSB-50T12L
xRSB-50T120
Notes:
1. Add “G” suffix at the end of the model number to indicate Tray Packaging. Replace”x” with “S” to
indicate SMT package, or “0” to indicate through hole package.
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
Input Voltage (continuous)
-0.3 V
Typ
-
Max
80 V
Notes
Input Voltage Transient (100 ms)
-0.3 V
100 V
Remote On/Off
-0.3 V
-
18 V
I/O Isolation Voltage
-
-
1500 V
Ambient Temperature
-40
°
C
-
85
°
C
Storage Temperature
-55
°
C
-
125
°
C
xRSB-50T Series RoHS Compliant
Rev.C