WSR
www.vishay.com
Vishay Dale
Revision: 22-Aug-16
1
Document Number: 30101
For technical questions, contact: ww2bresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Power Metal Strip
®
Resistors,
Low Value (down to 0.001 ), Surface Mount
DESIGN TOOLS (click logo to get started)
FEATURES
• Molded high temperature encapsulation
• All welded construction of the Power Metal
Strip
®
resistors are ideal for all types of current
sensing, voltage division and pulse
applications
• Proprietary processing technique produces
extremely low resistance values (down to
0.001 )
• Solid metal nickel-chrome or manganese-
copper alloy resistive element with low TCR
(< 20 ppm/°C)
• Very low inductance 0.5 nH to 5 nH
• Excellent frequency response to 50 MHz
• Low thermal EMF (< 3 μV/°C)
• AEC-Q200 qualified
(1)
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
Notes
• This datasheet provides information about parts that are RoHS-compliant and / or parts that are non-RoHS-compliant. For example, parts
with lead (Pb) terminations are not RoHS-compliant. Please see the information / tables in this datasheet for details.
• Follow link to Overview of Automotive Grade Products for more details: www.vishay.com/doc?49924.
(1)
Flame retardance test may not be applicable to some resistor technologies.
Notes
• Part marking: DALE, model, value, tolerance, date code.
(1)
The WSR3 requires a minimum of 1050 sq. mil. circuit traces connecting to the recommended solder pad.
Note
(1)
Packaging code: EB (lead (Pb)-free) and TB (tin / lead) are non-standard packaging codes designating 1000 piece reels. These non-standard
packaging codes are identical to our standard EA (lead (Pb)-free) and TA (tin / lead), except that they have a package quantity of 1000 pieces.
Available
Models
Available
Available
Available
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
SIZE
POWER RATING
P
70 °C
W
RESISTANCE VALUE RANGE
WEIGHT
(typical)
g/1000 pieces
Tol. ± 0.5 % Tol. ± 1.0 %
WSR2 4527 2.0 0.005 to 1.0 0.001 to 1.0 440
WSR3 4527 3.0
(1)
0.005 to 0.2 0.001 to 0.2 440
TECHNICAL SPECIFICATIONS
PARAMETER UNIT WSR2 AND WSR3 RESISTOR CHARACTERISTICS
Temperature coefficient ppm/°C
± 75 for 0.010 to 1.0 ; ± 110 for 0.005 to 0.0099 ;
± 300 for 0.004 to 0.0049 ± 450 for 0.003 to 0.0039 ;
± 600 for 0.002 to 0.0029 ; ± 750 for 0.001 to 0.0019
Element TCR ppm/°C < 20
Dielectric withstanding voltage V
AC
> 500
Insulation resistance > 10
9
Operating temperature range °C - 65 to + 275
Maximum working voltage V (P x R)
1/2
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: WSR25L000FEA (visit www.vishay.net Vishay Dale parts numbering manual for all options)
GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE
(1)
SPECIAL
WSR2
WSR3
L = m*
R = decimal
5L000 = 0.005
R0100 = 0.01
* Use “L” for resistance
values < 0.01
D = ± 0.5 %
F = ± 1.0 %
J = ± 5.0 %
EA = lead (Pb)-free, tape/reel
EK = lead (Pb)-free, bulk
(dash number)
(up to 2 digits)
from 1 to 99 as
applicable
TA = tin/lead, tape/reel (R86)
BA = tin/lead, bulk (B43)
R25L 00F0WS AE
