WSLS2512, Improved Stability www.vishay.com Vishay Dale Power Metal Strip Resistors, Improved Stability (0.25 % and 0.5 %), Low Value, Surface Mount FEATURES Current sensing in high-temperature (+125 C) applications Greater stability with maximum resistance change of 0.25 % or 0.5 % through 2000 h workload 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 (0.01 to 0.1 ) Available Solid metal nickel-chrome resistive element with low TCR (< 20 ppm/C) Sulfur resistance by construction that is click logo to get started DESIGN SUPPORT TOOLS unaffected by high sulfur environments Available Very low inductance 0.5 nH to 2 nH Low thermal EMF (< 3 V/C) Models Design Tools (1) AEC-Q200 qualified Available Available 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 WSLS2512 2512 1.0 0.5, 1.0, 5.0 0.01 to 0.1 63.6 Note Part marking: value, RTC / stability code TECHNICAL SPECIFICATIONS PARAMETER UNIT RESISTOR CHARACTERISTICS Component temperature coefficient ppm/C 75 (1) (including terminal) (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 GLOBAL PART NUMBER INFORMATION Global Part Numbering example: WSLS2512R0100FHEA (visit www.vishay.net Vishay Dale parts numbering manual for all options) W S L S 2 5 1 2 R 0 1 0 0 F H E A (1) (2) GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE RTC / STABILITY PACKAGING CODE SPECIAL WSLS2512 R = decimal D = 0.5 % G = 75 ppm, EA = lead (Pb)-free, (dash number) R0100 = 0.01 F = 1.0 % 0.25 % stability tape / reel (single digit) J = 5.0 % H = 75 ppm, EK = lead (Pb)-free, from 1 to 9 0.5 % stability bulk Notes (1) WSL marking (www.vishay.com/doc 30327) WSL Decade Values (www.vishay.com/doc 30117) (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 Revision: 19-Mar-18 Document Number: 30123 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 WSLS2512, Improved Stability www.vishay.com Vishay Dale DIMENSIONS in inches (millimeters) H l b W a T L Typical sensing traces Notes 3D models available: www.vishay.com/doc 30306 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 WSLS2512 (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 DERATING 120 100 1) Resistive element: 80 solid metal nickel-chrome or manganese-copper alloy resistive element with 60 low TCR (< 20 ppm/C) 4 2) Plated terminal 40 3) Terminal / element weld 4) Silicone coating with ink print 1 20 3 2 0 -65 -50 -25 0 25 50 75 100 125 150 170 Ambient Temperature in C 70 PERFORMANCE TEST LIMITS TEST CONDITIONS OF TEST 0.25 % 0.5 % Thermal shock -55 C to +150 C, 1000 cycles, 15 min at each extreme 0.5 % + 0.005 Short time overload 5 x rated power for 5 s for WSL2512 size or smaller 0.5 % + 0.005 Low temperature operation -65 C for 24h 0.5 % + 0.005 High temperature exposure 1000 h at +170 C 1.0 % + 0.005 Bias humidity +85 C, 85 % RH, 10 % bias, 1000 h 0.5 % + 0.005 Mechanical shock 100 gs for 6 ms, 5 pulses 0.5 % + 0.005 Vibration Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h 0.5 % + 0.005 Load life 2000 h at 70 C, 1.5 h ON, 0.5 h OFF 0.25 % 0.5 % Resistance to solder heat +260 C solder, 10 s to 12 s dwell, 25 mm/s emergence 0.5 % + 0.005 Moisture resistance MIL-STD-202, method 106, 0 % power, 7b not required 0.5 % + 0.005 (1) PACKAGING REEL MODEL TAPE WIDTH DIAMETER PIECES/REEL CODE WSLS2512 12 mm / embossed plastic 178 mm / 7 2000 EA Notes Embossed carrier tape per EIA-481 (1) Additional packaging details at www.vishay.com/doc 20051 Revision: 19-Mar-18 Document Number: 30123 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 Rated Power in %