Document Number: 30220
Revision 11-Sep-04
www.vishay.com
144
SPU Molded Style
Vishay Dale
For technical questions, contact ww2bresistors@vishay.com
Wirewound Resistors, Molded Style, Current Shunts,
Very Low Value, Four Terminal
FEATURES
• Molded four-terminal resistors for specialized
applications
• Extremely low resistance values for current sensing
applications
• Precision resistance tolerance
• Low temperature coefficients
• Complete welded construction
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL HISTORICAL POWER RATING * RESISTANCE RANGE WEIGHT
MODEL MODEL P25°CΩ(Typical)
W± 1% g
SPU050 SPU-50 1 0.001 - 0.060 2.5
SPU051 SPU-51 2 0.001 - 0.060 3.7
SPU052 SPU-52 4 0.001 - 0.200 4.8
SPU053 SPU-53 5 0.010 - 0.500 10.8
*Wattage rating is limited to 25 amperes maximum.
TECHNICAL SPECIFICATIONS
PARAMETER UNIT SPU MOLDED STYLE RESISTOR CHARACTERISTICS
Temperature Coefficient ppm/°C - 100 (- 10°C to + 80°C)
Dielectric Withstanding Voltage VAC 500 minimum
Short Time Overload - 5 x power for 5 seconds, limited to 25 amperes maximum
Maximum Working Voltage V (PxR)1/2
Insulation Resistance Ω10,000 Megohm minimum dry
Operating Temperature Range °C SPU-50 & SPU-51 = - 55/+175, SPU-52 & SPU-53 = - 55/+ 275
• Resistance tolerance available is 0.1%, 0.25%, 0.5%, 1.0%, 3.0% and 5.0% depending on resistor physical design and
resistance value.
GLOBAL RESISTANCE TOLERANCE PACKAGING SPECIAL
MODEL VALUE CODE
SPU052 L = Milliohm F = ± 1.0% E* = Lead Free, bulk (Dash Number)
(below 0.01Ω)J = ± 5.0% D = Tin/lead, bulk (up to 2 digits)
R = Decimal From 1-99
5L0000 = 0.005Ωas applicable
R10000 = 0.10Ω
GLOBAL PART NUMBER INFORMATION
New Global Part Numbering: SPU052R10000FD (preferred part numbering format)
SPU052R10 000FD
Historical Part Number example: SPU-52 0.1Ω 1% S51 (will continue to be accepted)
HISTORICAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING
SPU-052 0.100Ω1% S51
*Lead Free will not be available until Q1 2005
www.vishay.com
145
SPU Molded Style
Vishay Dale
Document Number: 30220
Revision 11-Sep-04
For technical questions, contact ww2bresistors@vishay.com
* Limited to 25 amperes maximum.
Wirewound Resistors, Molded Style, Current Shunts,
Very Low Value, Four Terminal
DIMENSIONS
MATERIAL SPECIFICATIONS
Element: Nickel-chromium alloy or copper-manganese
alloy, depending on resistance value
Molding Material: SPU050/051 thermo-set epoxy
SPU052/053 thermo-set silicone
Standard Terminals: SPU050/051:100% Sn
or 60/40 Sn/Pb coated
Copperweld®
SPU052/053:100% Sn
or 60/40 Sn/Pb coated
copper
Part Marking: DALE, Model, Wattage, Value, Tolerance,
Date Code
AMBIENT TEMPERATURE DERATING
Derating is required for ambient temperature above 25°C per the following graph
18 AWG
0.040 ± 0.002
[1.02 ± 0.051]
C
B
A
D
A
0.660 ± 0.010
[16.76 ± 0.25]
0.790 ± 0.010
[20.06 ± 0.25]
1.000 ± 0.010
[25.40 ± 0.25]
1.870 ± 0.010
[47.50 ± 0.25]
B
0.312 ± 0.010
[7.92 ± 0.25]
0.375 ± 0.010
[9.52 ± 0.25]
0.375 ± 0.010
[9.52 ± 0.25]
0.437 ± 0.010
[11.10 ± 0.25]
C
0.200 ± 0.015
[5.08 ± 0.38]
0.200 ± 0.015
[5.08 ± 0.38]
0.125 ± 0.015
[3.17 ± 0.38]
0.125 ± 0.015
[3.17 ± 0.38]
D
1.000 + 0.25 - 0.125
[25.40 + 6.35 - 3.17]
1.000 + 0.25 - 0.125
[25.40 + 6.35 - 3.17]
1.000 Minimum
[25.40 Minimum]
1.000 Minimum
[25.40 Minimum]
SPU050
SPU051
SPU052
SPU053
GLOBAL
MODEL
DIMENSIONS in inches [millimeters]
Derating
120
100
80
60
40
20
0
RATED POWER IN %
-55 -50 0 50 100 150 200 250 275
AMBIENT TEMPERATURE IN °C
SPU052 & 053
SPU050 & 051
25
175
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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