333 3 WSLT2512 www.vishay.com Vishay Dale Power Metal Strip Resistors, High Temperature (275 C), Low Value (Down to 0.01 ), Surface Mount FEATURES Ideal for all types of current sensing, voltage division and pulse applications including switching and linear power supplies, instruments and power amplifiers Proprietary processing technique produces extremely low resistance values All welded construction of the Power Metal Strip resistors are ideal for all types of current sensing, voltage division and pulse applications Sulfur resistance by construction that is unaffected by high sulfur environments Specially selected and stabilized materials allow for high LINKS TO ADDITIONAL RESOURCES temperature derating (to +275 C) Solid metal nickel-chrome alloy resistive element with low TCR (< 20 ppm/C) 3D Models Design Tools Very low inductance (< 5 nH) Excellent frequency response to 50 MHz Low thermal EMF (< 3 V/C) (1) AEC-Q200 qualified 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 STANDARD ELECTRICAL SPECIFICATIONS POWER RATING RESISTANCE WEIGHT TOLERANCE GLOBAL MODEL SIZE P VALUE RANGE (typical) 70 C % W g/1000 pieces (1) WSLT2512 2512 1.0 0.5, 1.0 0.01 to 0.50 63.6 Notes Part marking: DALE, value, tolerance code (1) For values above 0.1 derate linearly to 80 % rated power at 0.5 TECHNICAL SPECIFICATIONS PARAMETER UNIT WSL RESISTOR CHARACTERISTICS Component temperature coefficient (1) (including terminal) measured from ppm/C 75 -55 C to +150 C (2) Element TCR ppm/C < 20 Operating temperature range C -65 to +275 (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 Revision: 29-Jun-2021 Document Number: 30121 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 WSLT2512 www.vishay.com Vishay Dale GLOBAL PART NUMBER INFORMATION Global Part Numbering Example: WSLT2512R0100FEA (visit www.vishay.net Vishay Dale parts numbering manual for all options) W S L T 2 5 1 2 R 0 1 0 0 F E A (1) (2) GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE SPECIAL WSLT2512 R = decimal D = 0.5 % EA = lead (Pb)-free, tape / reel Reserved for R0100 = 0.01 F = 1.0 % EK = lead (Pb)-free, bulk future specials Notes (1) WSL marking (www.vishay.com/doc 30327) (2) 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 DIMENSIONS in inches (millimeters) H l b W a T L Typical sensing traces Notes 3D models available: www.vishay.com/doc 30338 Surface mount solder profile recommendations: www.vishay.com/doc 31052 DIMENSIONS SOLDER PAD DIMENSIONS MODEL LW H T a b l 0.250 0.010 0.125 0.010 0.025 0.010 0.030 0.010 0.065 0.145 0.160 WSLT2512 (6.35 0.254) (3.18 0.254) (0.635 0.254) (0.762 0.254) (1.65) (3.68) (4.06) WELDED CONSTRUCTION 2512 1) Resistive element: solid metal nickel-chrome or manganese-copper alloy resistive element with low TCR (< 20 ppm/C) 4 2) Plated terminal: Solid copper, 100 % Sn (100 min.) with 100 % Ni (20 min.) under 1 layer finish 3 2 3) Terminal / element weld 4) Silicone coating with ink print DERATING PULSE CAPABILITY 120 click to get started 100 80 60 40 20 0 - 65 - 25 25 75 125 175 225 275 Ambient Temperature in C 70 www.vishay.com/resistors/power-metal-strip-calculator Revision: 29-Jun-2021 Document Number: 30121 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 IILLLLUSTRAAATIVE PURRPPOSEESS OONLLLLLYY Rated Power in %