VRP2-50E2A0 [BEL]

DC-DC Regulated Power Supply Module;
VRP2-50E2A0
型号: VRP2-50E2A0
厂家: BEL FUSE INC.    BEL FUSE INC.
描述:

DC-DC Regulated Power Supply Module

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中文:  中文翻译
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NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
xRP2-50E2A0 RoHS Compliant PRELIMINARY Rev.B  
Features  
Non-Isolated  
Output Over-Voltage Shutdown  
OCP/SCP  
High Efficiency  
Fixed Switching Frequency  
Low Cost  
Excellent Thermal Performance  
Low Output Ripple  
Wide Input Voltage Range  
Wide Output Trim Range  
Power Good Signal  
Remote On/Off  
Class 1, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592)  
TUV EN60950-1 Recognized (Pending)  
UL60950-1 Recognized (UL/cUL) (Pending)  
Applications  
Networking  
Computers and peripherals  
Telecommunications  
Description  
The xRP2-50E2A0 is a non-isolated dc/dc converter that operates over a wide range of input voltage (Vin = 5  
Vdc - 13.8 Vdc). This unit can provide a precisely regulated output voltage from 0.6 Vdc to 5.0 Vdc and can  
deliver up to 50 A of output current. This unit is designed to be highly efficient and low cost. The converter is  
provided in an industry standard package.  
Part Selection  
Output Voltage  
Input Voltage  
Max. Output  
Current  
Max. Output  
Power  
Typical  
Efficiency  
Model Number  
Active High  
Model Number  
Active High  
0.6 Vdc - 5 Vdc  
5 Vdc - 13.8 Vdc  
50 A  
250 W  
86%  
VRP2-50E2A0  
0RP2-50E2A0  
Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging.  
Part Number Explanation  
V R P2 – 50 E 2A 0  
1
2
3
4
5 6  
7
1---Vertical mount, change “V” to “0” means through hole mount  
2---RoHS 6, change “R” to “7” means RoHS 5  
3---Series name, SIP  
4---Series code  
5--- Wide input range (5-13.8V)  
6---Wide output range (0.6-5V)  
7---Enable, active high  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
1
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Absolute Maximum Ratings  
Unit  
V
Parameter  
Min  
-0.3  
-0.3  
0
Typ  
Max  
15  
Notes  
Continuous Input Voltage  
Remote On/Off  
-
-
-
-
15  
V
Ambient Temperature  
Storage Temperature  
70  
C  
C  
-55  
125  
Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may  
permanently damage the device.  
Input Specifications  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Operating Input Voltage  
Vo2.8 V  
Vo > 2.8 V  
5
12  
12  
13.8  
13.8  
V
V
1.8*Vo  
Input Current (full load)  
-
-
-
38  
25  
A
Remote Off Input Current  
10  
mA  
Input Reflected Ripple Current  
(rms)  
With simulated source impedance of 1  
uH, 5 Hz to 20 MHz. Use a 1000 uF/16  
V electrolytic capacitor with ESR=0.1  
ohm max, at 100 kHz at 25°C.  
-
-
10  
35  
-
-
mA  
Input Reflected Ripple Current  
(pk-pk)  
mA  
I2t Inrush Current Transient  
Turn-on Voltage Threshold  
Turn-off Voltage Threshold  
-
-
1
A2s  
V
4.4  
4.0  
4.6  
4.3  
4.8  
4.6  
V
Note: All specifications are typical at 25 C unless otherwise stated.  
Output Specifications  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Output Voltage Set Point  
Vo1 V  
Vo1 V  
-1.5  
-10  
-
-
+1.5  
+10  
%Vo  
mV  
Vin=Vinmin, Io=Iomax  
Load regulation  
Line Regulation  
Vo1 V  
Vo1 V  
-
-
-
-
0.6  
12  
%Vo  
mV  
Vo1 V  
Vo1 V  
-
-
-
-
0.3  
9
%Vo  
mV  
Regulation Over Temperature  
(0deg.C-70deg.C)  
-
-
0.02  
%Vo/C  
Ripple and Noise (pk-pk)  
Vo=5.0 V  
-
-
-
-
-
-
-
-
-
-
-
-
110  
100  
100  
80  
60  
60  
mV  
mV  
mV  
mV  
mV  
mV  
Test conditions:  
Vo=3.3 V  
Vo=2.5 V  
Vo=1.5 V  
Vo=1.0 V  
Vo=0.6 V  
0-20MHz BW, with a 1µF ceramic  
capacitor and a 10 uF Tantalum cap  
at output.  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
2
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Output Specifications (continued)  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Ripple and Noise (rms)  
Vo=5.0 V  
Vo=3.3 V  
Vo=2.5 V  
Vo=1.5 V  
Vo=1.0 V  
Vo=0.6 V  
-
-
-
-
-
-
-
-
-
-
-
-
35  
35  
35  
30  
25  
25  
mV  
mV  
mV  
mV  
mV  
mV  
Test conditions:  
0-20MHz BW, with a 1µF ceramic  
capacitor and a 10 uF Tantalum cap at  
output.  
Vo=5V, over all operating input  
mV voltage, load and temperature  
conditions.  
Ripple and Noise (pk-pk)  
under worst case  
-
-
150  
Output Current Range  
Output DC Current Limit  
Turn on Time  
0
-
50  
180  
10  
A
105  
130  
%Io  
mS  
mS  
%
-
-
-
-
-
-
Rise Time  
3
Overshoot at Turn on  
Output Capacitance  
0.5  
0
-
4700  
uF  
ESR1 mΩ  
Transient Response  
Overshoot  
-
-
-
-
-
-
-
-
300  
100  
300  
100  
mV  
V50%~100%  
of Max Load  
Settling Time  
Overshoot  
uS  
Test conditions:  
di/dt = 10 A/uS; Vin =12 V; Co=0 uF.  
mV  
V100%~50%  
of Max Load  
Settling Time  
uS  
Note: All specifications are typical at nominal input, full load at 25°C unless otherwise stated.  
General Specifications  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Efficiency  
Vo=5.0 V  
Vo=3.3 V  
Vo=2.5 V  
Vo=1.8 V  
Vo=1.5 V  
Vo=1.2 V  
Vo=1.0 V  
Vo=0.6 V  
-
-
-
-
-
-
-
-
93  
91  
88  
86  
84  
82  
75  
68  
-
-
-
-
-
-
-
-
%
%
%
%
%
%
%
%
Vin=12V, full load  
Switching Frequency  
-
0.6  
110  
-
330  
-
-
5
kHz  
V
Output Voltage Trim Range  
Over Voltage Protection  
Weight  
Trim pin is open, Vo = 0.6 V.  
115  
28.5  
130  
-
%Vo Vin=12 V, Io=full load.  
g
Calculated Per Bell Core SR-332 (IO  
=40 A, Vo=1.92 V; Vin=12 V; Ta = 25  
C, 100LFM forced air flow,  
FIT=109/MTBF)  
FIT  
297  
-
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
3
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
General Specifications (continued)  
Parameter  
Min  
Typ  
Max  
Unit  
Notes  
Through Hole Mount  
Dimensions  
Inches (L × W × H)  
1.45 x 1.1 x 0.73  
-
Millimeters (L × W × H)  
36.83 x 27.94 x 18.5  
Dimensions  
Inches (L × W × H)  
1.45 x 1.1 x 0.69  
-
Vertical Mount  
Millimeters (L × W × H)  
36.83 x 27.94 x 17.53  
Note: All specifications are typical at 25 C unless otherwise stated.  
Efficiency Data  
Efficiency Curve Vo=1.2 V  
Efficiency Curve Vo=0.6 V  
95.0%  
85.0%  
90.0%  
85.0%  
80.0%  
75.0%  
70.0%  
65.0%  
60.0%  
80.0%  
75.0%  
70.0%  
65.0%  
60.0%  
55.0%  
50.0%  
5 V  
5 V  
12 V  
13.8 V  
12 V  
13.8 V  
5
12.5  
25  
37.5  
50  
5
12.5  
25  
37.5  
50  
Output Current (A)  
Output Current (A)  
Efficiency Curve Vo=1.8 V  
Efficiency Curve Vo=2.5 V  
95.0%  
90.0%  
85.0%  
80.0%  
75.0%  
70.0%  
65.0%  
60.0%  
100.0%  
95.0%  
90.0%  
85.0%  
80.0%  
75.0%  
70.0%  
65.0%  
5 V  
5 V  
12 V  
13.8 V  
12 V  
13.8 V  
5
12.5  
25  
37.5  
50  
5
12.5  
25  
37.5  
50  
Output Current (A)  
Output Current (A)  
Efficiency Curve Vo=3.3 V  
Efficiency Curve Vo=5.0 V  
100.0%  
95.0%  
90.0%  
85.0%  
80.0%  
75.0%  
70.0%  
65.0%  
100.0%  
95.0%  
90.0%  
85.0%  
80.0%  
75.0%  
70.0%  
65.0%  
6 V  
9 V  
12 V  
13.8 V  
12 V  
13.8 V  
5
12.5  
25  
37.5  
50  
5
12.5  
25  
37.5  
50  
Output Current (A)  
Output Current (A)  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
4
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Thermal Derating Curves  
Vin=12 V, Vo=0.6 V  
Vin=12 V, Vo=1.2 V  
Vin=12 V, Vo=2.5 V  
Vin=12 V, Vo=5.0 V  
Vin=12 V, Vo=1.8 V  
Vin=12 V, Vo=3.3 V  
Note: Maximum junction temperature of semiconductors derated to 120C.  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
5
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Ripple and Noise Waveforms  
12 Vdc input, 0.6 Vdc/50 A output  
12 Vdc input, 1.8 Vdc/50 A output  
12 Vdc input, 1.2 Vdc/50 A output  
12 Vdc input, 2.5 Vdc/50 A output  
12 Vdc input, 3.3 Vdc/50 A output  
12 Vdc input, 5.0 Vdc/50 A output  
Note: Ripple and noise at full load, 0-20 MHz BW, with a 10 uF and a 1uF ceramic cap at the output, and Ta=25  
deg C.  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
6
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Transient Response Waveforms  
Vout= 0.6 V 0%-50% Load Transient  
Vout=0.6 V 50%-0% Load Transient  
Vout=1.2 V 50%-0% Load Transient  
Vout=1.8 V 50%-0% Load Transient  
Vout=1.2 V 0%-50% Load Transient  
Vout=1.8 V 0%-50% Load Transient  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
7
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Transient Response Waveforms (continued)  
Vout= 2.5 V 0%-50% Load Transient  
Vout=2.5 V 50%-0% Load Transient  
Vout=3.3 V 50%-0% Load Transient  
Vout=5 V 50%-0% Load Transient  
Vout=3.3 V 0%-50% Load Transient  
Vout=5 V 0%-50% Load Transient  
Note: Transient response at di/dt = 10 A/uS, with extemal electrolytic cap 4700 uF, and Ta=25 deg C.  
.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
8
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Startup & Shutdown  
Rise Time  
Test Condition:  
12Vdc input,  
1.8Vdc/50A output,  
Co=0uF,  
Ta=25 deg C  
Startup time  
Startup from on/off  
Ch1: Vo  
Ch2: on/off  
Test Condition:  
12Vdc input,  
1.8Vdc/50A output  
Co=0uF,  
Ta=25 deg C  
Shutdown  
Test Condition:  
12Vdc input,  
1.8Vdc/50A output,  
Co=0uF,  
Ta=25 deg C  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
9
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Control Specifications  
Parameter  
Min  
Typ  
Max  
Notes  
Remote On/Off (Active High)  
Signal Low (Unit Off)  
Signal High (Unit On)  
Current Source/Sink  
-0.3 V  
2 V  
-
-
-
0.8 V  
Vin,max  
3.3 mA  
Remote On/Off pin is open, unit is off.  
0 mA  
PwGood (PowerGood)  
2.4 V  
-
-
-
-
5.25 V  
2 mA  
0.4 V  
4 mA  
PwGood = High = Power  
Good  
-
0 V  
-
PwGood = Low = Power  
Not Good  
Recommended remote on/off circuit for active high  
Vin+  
On/off  
Vin-  
Vin+  
On/off  
Vin-  
Control with open collector/drain circuit  
Control with photocoupler circuit  
Vin+  
Vin+  
Vcc  
On/off  
Vin-  
On/off  
Vin-  
Control with logic circuit  
Permanently off  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
10  
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Remote Sense  
This module has remote sense compensation feature. It can minimize the effects of resistance between  
module’s output and load in system layout and facilitates accurate voltage regulation at load terminals or  
other selected point.  
1. The remote sense lines carries very little current and hence do not require a large cross-sectional area.  
2. This module compensates for a maximum drop of 10% of the nominal output voltage.  
3. If the unit is already trimmed up, the available remote sense compensation range should be  
correspondingly reduced. The total voltage increased by trim and remote sense should not exceed 10%  
of the nominal output voltage.  
4. When using remote sense compensation, all the resistance, parasitic inductance and capacitance of the  
system are incorporated within the feedback loop of this module. It can make an effect on the module's  
compensation, affecting the stability and dynamic response. A 0.1uF ceramic capacitor can be  
connected at the point of load to de-couple noise on the sense wires.  
5. Recommend the connection of remote sense compensation as below figure. There are a resistor RS+  
(51.1 ohm) from Vo+ to Sense+ and a resistor RS- (51.1 ohm)) from Vo- to Sense- inside of this module.  
Vo+  
Sense+  
Load  
Sense-  
Vo-  
6. If not using remote sense compensation, please connect sense directly to output at module's pin, that is,  
connect sense+ to Vo+ and sense- to Vo- at module's pin, the shorter the better. see below figure.  
Vo+  
Sense+  
Load  
Sense-  
Vo-  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
11  
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Output Trim Equations  
Equations for calculating the trim resistor are shown below. The Trim Up resistor should be connected between  
the Trim+ pin and Trim- pin.  
The Trim Up resistor is NIL,Vout=0.6V  
Maximum trim up voltage is 5V.  
The total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage.  
Vout  
1.2  
Rtrim  
( K)  
Module  
Trim+  
Trim–  
Vo 0.6  
Rtrim  
Over Current Protection  
To provide protection in a fault output overload condition, the module is equipped with internal current-limiting  
circuitry. If the overcurrent condition persists, the module will shut down into hiccup mode and restart. The  
module operates normally when the output current goes into specified range.  
12Vdc input, 1.8Vdc output and Ta=25 deg C  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
12  
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Over Voltage Protection  
The output overvoltage protection consists of circuitry that monitors the voltage on the output terminals. If  
the voltage on the output terminals exceeds the over voltage protection threshold, the module will shutdown  
into latch off mode. The overvoltage latch can be reset by either cycling the input power or toggling the  
on/off signal for one second at least.  
Input Under-voltage Lockout  
Under-voltage Lockout  
V1=4.3V  
V2=4.6V  
Voltage Falling  
Voltage Rising  
Input Voltage (V)  
V1  
V2  
Power Good  
1. This module has a power good indicator output. Power good pin used positive logic and is open collector.  
2. Power good pin can sink 10mA.  
3. The maximum voltage pulled up externally on Power Good pin should not exceed 30V.  
4. When the output reaches 90% of the nominal set-point, the power good pin will be pulled high.  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
13  
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Mechanical Outline  
0RP2-50E2A0  
Pin Connections  
Pin  
Function  
Pin  
Function  
1
2
3
4
5
6
7
8
Vout  
Vout  
Vout  
9
PwGOOD  
Sense-  
Sense+  
Vin  
10  
11  
12  
13  
14  
15  
GND  
GND  
Vin  
Enable  
Trim-  
GND  
GND  
Trim+  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
14  
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Mechanical Outline (continued)  
VRP2-50E2A0  
Pin Connections  
Pin  
Function  
1
Vout  
Vout  
2
Vout  
3
4
GND  
GND  
5
6
Enable  
Trim-  
7
8
Trim+  
PwGOOD  
Sense-  
Sense+  
Vin  
9
10  
11  
12  
13  
14  
15  
Vin  
GND  
GND  
Note: This module is recommended and compatible with Pb-Free Wave Soldering and must be soldered  
using a peak solder temperature of no more than 260 ºC for less than 5 seconds.  
Note:  
1) All Pins: Material - Copper Alloy;  
Finish – 3 micro inches minimum Gold over 50 micro inches minimum Nickel plate.  
2) Undimensioned components are shown for visual reference only.  
3) All dimensions in inches (mm); Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm).  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com  
15  
NON-ISOLATED DC/DC CONVERTERS  
5 Vdc - 13.8 Vdc Input  
0.6 Vdc - 5.0 Vdc/50 A Output  
April 17, 2009  
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.  
Labeling Information  
Heatsink side view  
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications and D.C. (Date Code) pictured on labels,  
may change depending on the date manufactured.  
Revision History  
Date  
Version  
Changes Detail  
Approval  
XF JIANG  
XF JIANG  
2009-4-9  
2009-4-17  
A
B
First release  
1. Correct error in part number explanation; 2. Remove some “TBD”  
information.  
RoHS Compliance  
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and  
other hazardous substances from electronic products.  
2009 Bel Fuse Inc. Specifications subject to change without notice. 041709  
16  
CORPORATE  
FAR EAST  
EUROPE  
Bel Fuse Inc.  
Bel Fuse Ltd.  
Bel Fuse Europe Ltd.  
206 Van Vorst Street  
Jersey City, NJ 07302  
Tel 201-432-0463  
Fax 201-432-9542  
www.belfuse.com  
8F/ 8 Luk Hop Street  
San Po Kong  
Kowloon, Hong Kong  
Tel 852-2328-5515  
Fax 852-2352-3706  
www.belfuse.com  
Preston Technology Management Centre  
Marsh Lane, Suite G7, Preston  
Lancashire, PR1 8UD, U.K.  
Tel 44-1772-556601  
Fax 44-1772-888366  
www.belfuse.com  

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