WSLT3921, WSLT5931 www.vishay.com Vishay Dale Power Metal Strip Resistors, High Temperature (275 C), Low Value (down to 0.0002 ), Surface Mount FEATURES Available Ideal for all types of current sensing, voltage division and pulse applications including switching and linear power supplies, instruments, power amplifiers Proprietary processing technique produces extremely low resistance values, down to 0.0002 Specially selected and stabilized materials allow for high temperature derating (to +275 C) All welded construction Solid metal iron-chrome or manganese-copper alloy resistive element with low TCR (< 20 ppm/C) Very low inductance (< 5 H) DESIGN TOOLS (click logo to get started) Low thermal EMF (< 3 V/C) (1) AEC-Q200 qualified available Material categorization: for definitions of compliance Models Available please see www.vishay.com/doc 99912 Note (1) Flame retardance test may not be applicable to some resistor technologies STANDARD ELECTRICAL SPECIFICATIONS POWER RATING RESISTANCE VALUE RESISTANCE VALUES WEIGHT GLOBAL TOLERANCE (1) SIZE P RANGE CURRENTLY AVAILABLE (typical) 70 C MODEL % W g/1000 pieces WSLT3921 3921 3.0 1.0, 5.0 0.2m to 4m 0.2m, 0.5m, 1m, 2m, 3m, 4m 281 WSLT5931 5931 5.0 1.0, 5.0 0.3m to 3m 0.3m, 0.5m, 1m, 2m, 3m 398 Notes Part marking: No part marking on these parts (1) Other values may be available, contact factory TECHNICAL SPECIFICATIONS PARAMETER UNIT RESISTOR CHARACTERISTICS 175 for 0.2 m and 0.5 m Component temperature coefficient ppm/C (1) (including terminal) 75 for 1 m to 4 m (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 GLOBAL PART NUMBER INFORMATION Global Part Numbering: WSLT39212L000FEA (WSLT3921, 0.002 , 1 %) (visit www.vishay.net Vishay Dale parts numbering manual for all options) W S L T 3 9 2 1 2 L 0 0 0 F E A (1) GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE SPECIAL WSLT3921 L = m F = 1.0 % EA = lead (Pb)-free, tape/reel Reserved for WSLT5931 2L000 = 0.002 J = 5.0 % EK = lead (Pb)-free, bulk future specials Note (1) 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: 27-Mar-17 Document Number: 30136 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 WSLT3921, WSLT5931 www.vishay.com Vishay Dale DIMENSIONS DIMENSIONS in inches (millimeters) MODEL LW H T 0.394 0.010 0.205 0.010 0.020 0.080 0.010 H WSLT3921 D (10.0 0.254) (5.20 0.254) (0.5) (2.00 0.254) 0.591 0.010 0.305 0.010 0.020 0.157 0.010 L W WSLT5931 (15.0 0.254) (7.75 0.254) (0.5) (4.00 0.254) T SOLDER PAD DIMENSIONS in inches (millimeters) MODEL Typical current sensing traces db l 0.106 0.010 0.244 0.010 0.220 0.005 WSLT3921 (2.70 0.254) (6.20 0.254) (5.60 0.13) I b 0.205 0.010 0.344 0.010 0.220 0.005 WSLT5931 (5.20 0.254) (8.75 0.254) (5.60 0.13) d Note RESISTANCE D 3D models available at www.vishay.com/ppg 30136 GLOBAL ELEMENT VALUE THICKNESS MODEL MATERIAL (m ) (Inches) DERATING - AMBIENT TEMPERATURE WSLT3921 0.2 0.0560 Mn-Cu WSLT3921 0.5 0.0300 Mn-Cu 120 WSLT3921 1.0 0.0150 Mn-Cu WSLT3921 2.0 0.0270 Fe-Cr 100 WSLT3921 3.0 0.0170 Fe-Cr 80 WSLT3921 4.0 0.0130 Fe-Cr WSLT5931 0.3 0.0300 Mn-Cu 60 WSLT5931 0.5 0.0180 Mn-Cu 40 WSLT5931 1.0 0.0330 Fe-Cr WSLT5931 2.0 0.0155 Fe-Cr 20 WSLT5931 3.0 0.0105 Fe-Cr 0 -650270 150 20075 Ambient Temperature in C DERATING - TERMINAL TEMPERATURE 120 120 100 100 80 80 60 60 40 40 Stability < 1.0 % Stability < 1.0 % 20 20 Stability < 0.5 % Stability < 0.5 % 0 0 0 20 40 60 80 100 120 140 160 180 0 20 40 60 80 100 120 140 160 180 Terminal Temperature T in C Terminal Temperature T in C K K Example: WSLT3921 0.0005 Example: WSLT5931 0.0005 Revision: 27-Mar-17 Document Number: 30136 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 P/P in % Rated Power in % Norm P/P in % Norm