333 3 Upgrade for Smaller Footprint to WSK1216 and for Higher Current to WSLP2726 WSL2726 www.vishay.com Vishay Dale Power Metal Strip Resistors, Low Value, High Power, Surface-Mount, 4-Terminal FEATURES 4-terminal design allows for 1 % tolerance down to 0.0002 High power to foot print size ratio Ideal for all types of current sensing, voltage division and pulse applications including switching and linear power supplies, instruments, power amplifiers and shunts 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 0.0002 Sulfur resistance by construction that is unaffected by high sulfur environments Solid metal nickel-chrome, manganese-copper-tin, or LINKS TO ADDITIONAL RESOURCES manganese-copper alloy resistive element with low TCR (< 20 ppm/C) Very low inductance 0.5 nH to 5 nH 3D Models Design Tools Low thermal EMF (< 3 V/C) (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 0.2m, 0.3m, 0.5m, 0.7m, 1m, WSL2726 2726 3.0 1.0 0.2m to 5m 420 1.3m, 2m, 3m, 4m, 5m Notes Power rating depends on the max. temperature at the solder point, component placement density and the substrate material Part marking: model, value, tolerance, date code (1) Other values may be available, contact factory GLOBAL PART NUMBER INFORMATION Global Part Numbering example: WSL2726L5000FEA (visit www.vishay.net Vishay Dale parts numbering manual for all options) W S L 2 7 2 6 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) WSL2726 L = m F = 1.0 % EA = lead (Pb)-free, tape / reel (dash number) L5000 = 0.0005 EK = lead (Pb)-free, bulk (up to 2 digits) 1L000 = 0.0010 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 designating 1000 piece reels. This non-standard packaging code is identical to our standard EA (lead (Pb)-free), except that they have a package quantity of 1000 pieces (3) Follow link for customization capabilities: www.vishay.com/doc 48163 Revision: 22-Feb-2021 Document Number: 30131 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 DUpgrade for Smaller Footprint to WSK1216 and for Higher Current to WSLP2726 WSL2726 www.vishay.com Vishay Dale TECHNICAL SPECIFICATIONS PARAMETER UNIT RESISTOR CHARACTERISTICS -100 ppm for 0.2 m and 0.3 m Component temperature coefficient 75 ppm for 0.5 m to 1.0 m (1) (including terminal) ppm/C 50 ppm for 1.3 m TCR measured from -55 C to 150 C 25 ppm for 2 m to 5 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 Outline (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 W L c 1 Resistive element: refer to table below d b for element material a S 2 Terminal: solid copper w b U T 3 Terminal / element weld R N 1 H 3 2 Notes 3D models available: www.vishay.com/doc 30308 Surface mount solder profile recommendations: www.vishay.com/doc 31052 DIMENSIONS MODEL R LW H ST U N (REF.) 0.272 0.008 0.260 + 0.012/- 0.008 Please see 0.195 0.028 0.004 0.016 0.002 0.078 0.004 0.039 0.006 WSL2726 (6.9 0.2) (6.6 + 0.3/- 0.2) table below (5.0) (0.7 0.1) (0.4 0.05) (2.0 0.1) (0.99 0.15) SOLDER PAD DIMENSIONS MODEL ab cd w WSL2726 0.220 (5.6) 0.096 (2.44) 0.035 (0.89) 0.035 (0.89) 0.290 (7.4) (1) RESISTANCE VALUE THERMAL RESISTANCE HEIGHT MODEL ELEMENT MATERIAL (m) (C/W) H 0.2 3 Mn-Cu-Sn 0.150 0.008 (3.81 0.2) 0.3 4 Mn-Cu 0.141 0.008 (3.58 0.2) 0.5 6 Mn-Cu 0.116 0.008 (2.95 0.2) 0.7 8 Mn-Cu 0.111 0.008 (2.82 0.2) 1.0 10 Mn-Cu 0.1055 0.008 (2.68 0.2) WSL2726 1.3 11 Ni-Cr 0.119 0.008 (3.02 0.2) 2.0 16 Ni-Cr 0.114 0.008 (2.9 0.2) 3.0 19 Ni-Cr 0.110 0.008 (2.79 0.2) 4.0 22 Ni-Cr 0.110 0.008 (2.79 0.2) 5.0 38 Ni-Cr 0.110 0.008 (2.79 0.2) 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: 22-Feb-2021 Document Number: 30131 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