33 3 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) Sulfur resistance by construction that is unaffected by high sulfur environments All welded construction DESIGN SUPPORT TOOLS AVAILABLE Solid metal iron-chrome or manganese-copper alloy resistive element with low TCR (< 20 ppm/C) 3D Models Design Tools Very low inductance (< 5 H) Low thermal EMF (< 3 V/C) (1) AEC-Q200 qualified available Material categorization: for definitions of compliance 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 0.2m, 0.3m, 0.5m, 0.7m, 1m, WSLT3921 3921 3.0 1.0, 5.0 0.2m to 4m 281 1.5m, 2m, 2.5m, 3m, 4m 0.1m, 0.2m, 0.3m, 0.5m, WSLT5931 5931 5.0 1.0, 5.0 0.3m to 3m 398 1m, 2m, 3m Note (1) Other values may be available, contact factory 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) (2) (3) GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE SPECIAL (7 digits) (5 digits) (1 digit) (2 digits) (up to 2 digits) 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 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 (3) Follow link for customization capabilities: www.vishay.com/doc 48163 Revision: 17-Jun-2019 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 DD D WSLT3921, WSLT5931 www.vishay.com Vishay Dale TECHNICAL SPECIFICATIONS PARAMETER UNIT RESISTOR CHARACTERISTICS Component temperature coefficient 175 for 0.2 m to < 1 m (1) (including terminal) ppm/C 75 for 1 m to 4 m TCR measured from -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 DIMENSIONS H D 1 L W 3 2 T 1) Resistive element: Fe-Cr Typical current sensing traces (element material used is dependent on resistance value) 2) Terminal: Solid copper I 3) Terminal / element weld b 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) MODEL LW H T 0.394 0.010 0.205 0.010 0.020 0.080 0.010 WSLT3921 (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 WSLT5931 (15.0 0.254) (7.75 0.254) (0.5) (4.00 0.254) SOLDER PAD DIMENSIONS in inches (millimeters) MODEL 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) 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) RESISTANCE TYPICAL THERMAL D GLOBAL ELEMENT VALUE RESISTANCE THICKNESS MODEL MATERIAL (m ) (C/W) (Inches) WSLT3921 0.2 2.7 0.0560 Mn-Cu WSLT3921 0.5 5.8 0.0300 Mn-Cu WSLT3921 0.7 6.3 0.0205 Mn-Cu WSLT3921 1.0 10.9 0.0150 Mn-Cu WSLT3921 2.0 12.0 0.0270 Fe-Cr WSLT3921 3.0 20.7 0.0170 Fe-Cr WSLT3921 4.0 22.8 0.0130 Fe-Cr WSLT5931 0.3 3.5 0.0300 Mn-Cu WSLT5931 0.5 5.7 0.0180 Mn-Cu WSLT5931 1.0 7.2 0.0330 Fe-Cr WSLT5931 2.0 13.2 0.0155 Fe-Cr WSLT5931 3.0 19.3 0.0105 Fe-Cr Revision: 17-Jun-2019 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