WSL3921, WSL5931 www.vishay.com Vishay Dale Power Metal Strip® Resistors, Low Value (down to 0.0002 ), Surface Mount FEATURES • All welded construction of the Power Metal Available 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 0.0002  • Sulfur resistance by construction that is unaffected by high sulfur environments • Solid metal iron-chrome or manganese-copper alloy DESIGN SUPPORT TOOLS click logo to get started resistive element with low TCR (< 20 ppm/°C) • Very low inductance 0.5 nH to 5 nH Models Design Tools Available Available • Low thermal EMF (< 3 μV/°C) • AEC-Q200 qualified (1) • 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 SIZE P VALUE RANGE CURRENTLY AVAILABLE (1) (typical) MODEL 70 °C % W   g/1000 pieces 0.2m, 0.3m, 0.5m, 0.7m, 1m, 1.5m, 2m, 2.5m, WSL3921 3921 3.0 1.0, 5.0 0.2m to 4m 281 3m, 4m WSL5931 5931 5.0 1.0, 5.0 0.2m to 3m 0.2m, 0.3m, 0.5m, 1m, 2m, 3m 398 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 GLOBAL MODEL RESISTANCE VALUE (1) TOLERANCE CODE PACKAGING CODE (2) SPECIAL (3) (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: 19-Oct-2018 1 Document Number: 30110 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

WSL3921, WSL5931 www.vishay.com Vishay Dale TECHNICAL SPECIFICATIONS RESISTOR CHARACTERISTICS PARAMETER UNIT WSL3921 WSL5931 Component temperature coefficient ± 225 for 0.2 m ± 175 for 0.2 m to 0.7 m (including terminal) (1) ppm/°C ± 175 for 0.3 m and 0.5 m TCR measured from -55 °C to 150 °C ± 75 for 1 m to 4 m ± 75 for 1 m to 3 m Element TCR (2) ppm/°C < 20 Operating temperature range °C -65 to +170 Maximum working voltage (3) V (P x R)1/2 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) H D 1 L W 3 2 T 1) Resistive element: Fe-Cr Typical sensing traces (element material used is dependent on resistance value) 2) Terminal: Solid copper I b 3) Terminal / element weld d 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 L W H T d b l 0.394 ± 0.010 0.205 ± 0.010 0.020 0.080 ± 0.010 0.106 ± 0.010 0.244 ± 0.010 0.220 ± 0.005 WSL3921 (10.0 ± 0.254) (5.20 ± 0.254) (0.5) (2.00 ± 0.254) (2.70 ± 0.254) (6.20 ± 0.254) (5.60 ± 0.13) 0.591 ± 0.010 0.305 ± 0.010 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 ± 0.254) (0.5) (4.00 ± 0.254) (5.20 ± 0.254) (8.75 ± 0.254) (5.60 ± 0.13) TYPICAL THERMAL GLOBAL RESISTANCE VALUE “D” THICKNESS ELEMENT RESISTANCE MODEL (m) (INCHES) MATERIAL (°C/W) (1) 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 0.2 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: 19-Oct-2018 2 Document Number: 30110 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

WSL3921, WSL5931 www.vishay.com Vishay Dale DERATING - AMBIENT TEMPERATURE DERATING - TERMINAL TEMPERATURE % 120 % 120 n n wer i 100 iNorm 100 o P d P 80 P/ 80 e Rat 60 60 40 40 Stability < 1.0 % 20 20 Stability < 0.5 % 0 0 -65-50 -25 0 25 50 70 100 125 150 170 0 20 40 60 80 100 120 140 160 180 Ambient Temperature in °C Terminal Temperature TK in °C PULSE CAPABILITY click to get started LLLLL YY N OO SS EE S O PP RR U P E V TI AAA R T S U LL LL II www.vishay.com/resistors/power-metal-strip-calculator PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS Thermal shock -55 °C to +150 °C, 1000 cycles, 15 min at each extreme ± 1.0 % Short time overload 5x rated power for 5 s ± 0.5 % Low temperature storage -65 °C for 24 h ± 0.5 % High temperature exposure 1000 h at +170 °C ± 1.0 % Bias humidity +85 °C, 85 % RH, 10 % bias, 1000 h ± 0.5 % Mechanical shock 100 g’s for 6 ms, 5 pulses ± 0.5 % Vibration Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h ± 0.5 % Load life 1000 h at +70 °C, 1.5 h “ON”, 0.5 h “OFF” ± 1.0 % Resistance to solder heat 3x at 250 °C ± 5 °C for 30 s ± 5 s ± 0.5 % Moisture resistance MIL-STD-202, method 106, 0 % power, 7a and 7b not required ± 0.5 % PACKAGING REEL MODEL TAPE WIDTH DIAMETER PIECES/REEL CODE WSL3921 16 mm/embossed plastic 330 mm/13" 3000 EA WSL5931 24 mm/embossed plastic 330 mm/13" 1500 EA Notes • Embossed carrier tape per EIA-481 (1) Additional packaging details at www.vishay.com/doc?20051 Revision: 19-Oct-2018 3 Document Number: 30110 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

Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROV E RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose o r the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein. Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustainin g applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk . Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this documen t or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. © 2019 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED Revision: 01-Jan-2019 1 Document Number: 91000