333 3 WSL3921, WSL5931 www.vishay.com Vishay Dale Power Metal Strip Resistors, Low Value (Down to 0.0001 ), Surface Mount FEATURES 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 0.0001 Sulfur resistance by construction that is unaffected by high sulfur environments Solid metal iron-chrome or manganese-copper alloy LINKS TO ADDITIONAL RESOURCES resistive element with low TCR (< 20 ppm/C) Very low inductance 0.5 nH to 5 nH 3D Models Design Tools Upgrade Low thermal EMF (< 3 V/C) Performance (1) AEC-Q200 qualified Material categorization: for definitions of compliance please see www.vishay.com/doc 99912 Notes 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 STANDARD ELECTRICAL SPECIFICATIONS POWER RATING RESISTANCE RESISTANCE VALUES WEIGHT GLOBAL TOLERANCE (1) SIZE P VALUE RANGE CURRENTLY AVAILABLE (typical) 70 C MODEL % W g/1000 pieces 0.1m, 0.2m, 0.3m, 0.5m, 0.7m, 1m, 1.5m, WSL3921 3921 3.0 1.0, 5.0 0.1m to 4m 281 2m, 2.5m, 3m, 4m 5.0 1.0, 5.0 2m to 3m 2m, 3m 398 WSL5931 5931 5.0 1.0, 5.0 0.1m to 1m 0.1m, 0.2m, 0.3m, 0.5m, 1m 1253 Note (1) Other values may be available, contact factory GLOBAL PART NUMBER INFORMATION Global Part Numbering: WSL3921L5000FEA (WSL3921, 0.0005 , 1 %) (visit www.vishay.net Vishay Dale parts numbering manual for all options) W S L 3 9 2 1 L 5 0 0 0 F E A (1) (2) (3) GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE SPECIAL (7 digits) (5 digits) (1 digit) (2 digits) (up to 2 digits) WSL3921 L = m F = 1.0 % EA = lead (Pb)-free, tape/reel (dash number) WSL5931 L5000 = 0.0005 J = 5.0 % EK = lead (Pb)-free, bulk (up to 2 digits) from 1 to 99 as applicable Notes (1) WSL marking (www.vishay.com/doc 30327) (2) Packaging code: EB (lead (Pb)-free) is a non-standard packaging code that designates a 1000 piece reel size. The non-standard packaging code is identical to our standard EA (lead (Pb)-free) packaged code, except that it has a package quantity of 1000 pieces (3) Follow link for customization capabilities: www.vishay.com/doc 48163 Revision: 18-Feb-2021 Document Number: 30110 1 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 DDD D WSL3921, WSL5931 www.vishay.com Vishay Dale TECHNICAL SPECIFICATIONS RESISTOR CHARACTERISTICS PARAMETER UNIT WSL3921 WSL5931 350 for 0.1 m +300 for 0.1 m (+25 C to +170 C) Component temperature coefficient 150 for 0.2 m 225 for 0.2 m (1) (including terminal) ppm/C 170 for 0.3 m 175 for 0.3 m and 0.5 m TCR measured from -55 C to 150 C 150 for 0.5 m to 1 m 75 for 1 m to 3 m 50 for 1.5 m to 4 m - (2) Element TCR ppm/C < 20 Operating temperature range C -65 to +170 (3) 1/2 Maximum working voltage V(P x R) Notes (1) Component TCR - total TCR that includes the TCR effects of the resistor element and the copper terminal (2) Element TCR - only applies to the alloy used for the resistor element refer to item 1 in the construction illustration on the following page (3) Maximum working voltage - the WSL is not voltage sensitive, but is limited by power / energy dissipation and is also not ESD sensitive DIMENSIONS in inches (millimeters) CONSTRUCTION OUTLINE Typical sensing traces 1 Resistive element: refer to table below for element material I b 2 Terminal: solid copper 1 H 3 Terminal / element weld d 3 D L W 2 T Notes 3D models available: 3921 model www.vishay.com/doc 30315 5931 model www.vishay.com/doc 30317 Surface mount solder profile recommendations: www.vishay.com/doc 31052 DIMENSIONS in inches (millimeters) SOLDER PAD DIMENSIONS in inches (millimeters) MODEL (1) LW H Tdb l 0.020 0.080 0.010 WSL3921 0.394 0.010 0.205 0.015 (0.5) (2.00 0.254) 0.106 0.010 0.244 0.010 0.220 0.005 (10.0 0.254) (5.20 0.381) (2.70 0.254) (6.20 0.254) (5.60 0.13) WSL3921 0.020 0.005 0.130 0.010 (0.1 m only) (0.5 0.127) (3.30 0.254) 0.591 0.010 0.305 0.015 0.020 0.157 0.010 0.205 0.010 0.344 0.010 0.220 0.005 WSL5931 (15.0 0.254) (7.75 0.381) (0.5) (4.00 0.254) (5.20 0.254) (8.75 0.254) (5.60 0.13) Note (1) H dimension is reference only. Total height reference is H dimension + D thickness GLOBAL RESISTANCE VALUE TYPICAL THERMAL RESISTANCE D THICKNESS ELEMENT (1) MODEL (m) (C/W) (INCHES) MATERIAL WSL3921 0.1 0.9 0.0560 Mn-Cu-Sn WSL3921 0.2 2.7 0.0560 Mn-Cu-Sn WSL3921 0.3 3.8 0.0510 Mn-Cu WSL3921 0.5 5.8 0.0300 Mn-Cu WSL3921 0.7 6.3 0.0205 Mn-Cu WSL3921 1.0 10.9 0.0150 Mn-Cu WSL3921 1.5 8.3 0.0360 Fe-Cr WSL3921 2.0 12.0 0.0270 Fe-Cr WSL3921 3.0 20.7 0.0170 Fe-Cr WSL3921 4.0 22.8 0.0130 Fe-Cr WSL5931 0.1 1.6 0.0560 Mn-Cu-Sn WSL5931 0.2 2.4 0.0485 Mn-Cu WSL5931 0.3 3.5 0.0300 Mn-Cu WSL5931 0.5 5.7 0.0180 Mn-Cu WSL5931 1.0 7.2 0.0330 Fe-Cr WSL5931 2.0 13.2 0.0155 Fe-Cr WSL5931 3.0 19.3 0.0105 Fe-Cr Note (1) The full power rating of power metal strip resistors are dependent upon the ability of the circuit board to dissipate the heat energy created in the resistance element. It is recommended to follow common design practices for power semiconductors that ensure the junction temperature is maintained with in thermal limits by using large pad surfaces, thermal vias, heavier copper weights, internal layers as well as other thermal spreading features. The thermal resistance values provided function in the same manner as junction to terminal temperature Revision: 18-Feb-2021 Document Number: 30110 2 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