333 3 WFM www.vishay.com Vishay Dale Power Metal Plate Current Sense Resistors, Low Value (10 m to 500 m ), Surface-Mount, High Power FEATURES 2010 and 2512 size package Ideal for all types of current sensing and pulse applications including switching and linear power supplies, instruments, power amplifiers, shunts, power inverters, and battery management Proprietary processing technique produces low resistance values (10 m to 500 m ) Solid metal manganese-copper and nickel- chromium-aluminum alloy resistive element with low TCR (< 20 ppm/C) Very low inductance 0.5 nH to 5 nH Low thermal EMF (< 3 V/C) Sulfur resistance by construction that is unaffected by high sulfur environments LINKS TO ADDITIONAL RESOURCES (1) AEC-Q200 qualified PATENT(S): www.vishay.com/patents Material categorization: for definitions of compliance 3D Models Did You Videos Infographics Know please see www.vishay.com/doc 99912 Note (1) Flame retardance test may not be applicable to some resistor technologies STANDARD ELECTRICAL SPECIFICATIONS (1) POWER RATING TOLERANCE RESISTANCE VALUE RANGE WEIGHT (typical) GLOBAL MODEL SIZE W % g/1000 pieces WFMA2010 2010 3.0 at 70 C 1.0 0.010 to 0.0329 32 WFMA2010 2010 2.0 at 110 C 1.0 0.010 to 0.0329 32 WFMB2010 2010 3.0 at 70 C 1.0 0.033 to 0.500 32 WFMB2010 2010 2.0 at 110 C 1.0 0.033 to 0.500 32 WFMA2512 2512 4.0 at 70 C 1.0 0.010 to 0.0329 41 WFMA2512 2512 3.0 at 95 C 1.0 0.010 to 0.0329 41 WFMB2512 2512 4.0 at 70 C 1.0 0.033 to 0.500 41 WFMB2512 2512 3.0 at 95 C 1.0 0.033 to 0.500 41 Note (1) Terminal temperature GLOBAL PART NUMBER INFORMATION Global Part Numbering Example: WFMB2512R5000FEA W F M B 2 5 1 2 R 5 0 0 0 F E A RESISTANCE PACKAGING ELEMENT TOLERANCE (3) GLOBAL MODEL CASE SIZE SPECIAL (1) (2) MATERIAL VALUE CODE CODE (3 digits) (4 digits) (2 digits) (1 digit) (1 digit) (5 digits) (2 digits) WFM A = CuMn 2010 R = decimal F = 1.0 % EA = Dash numbers B = NiCrAl 2512 R0100 = 0.01 J = 5.0 % lead (Pb)-free, 1 thru 99 tape / reel as applicable Notes (1) Power Metal Plate marking (www.vishay.com/doc 30327) WSL decade values (www.vishay.com/doc 30117) (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 it has a package quantity of 1000 pieces (3) Follow link for customization capabilities: www.vishay.com/doc 48614 PATENT(S): www.vishay.com/patents This Vishay product is protected by one or more United States and international patents. Revision: 05-May-2021 Document Number: 30387 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 WFM www.vishay.com Vishay Dale TECHNICAL SPECIFICATIONS RESISTOR CHARACTERISTICS PARAMETER UNIT MODEL 2010 2512 Temperature coefficient (20 C to 60 C) ppm/C All < 20 (1) (element only) Operating temperature range C All -65 to +170 (3) 1/2 Maximum working voltage VAll (P x R) Maximum terminal temperature C All 110 95 Temperature coefficient WFMA 110 110 (-55 C to +150 C) ppm/C (2) WFMB 50 50 (including terminals) Temperature coefficient WFMA 30 40 (20 C to 60 C) ppm/C (2) WFMB 20 20 (including terminals) Notes (1) Element TCR - only applies to the alloy used for the resistor element (2) Component TCR - total TCR that includes the TCR effects of the resistor element and the copper terminal (3) Maximum working voltage - the WFM is not voltage sensitive, but is limited by power / energy dissipation and is also not ESD sensitive (1) DIMENSIONS CONSTRUCTION OUTLINE T2 5 4 3 W 2 1 H T1 L 7 l 6 b 1 Sn plating 4 Cu heat spreaders 7 Resistive element 2 Ni plating 5 Overcoat a 3 Adhesive 6 Cu plating Typical sensing traces Notes 3D models available: www.vishay.com/doc 30401 Surface mount solder profile recommendations: www.vishay.com/doc 31052 (1) For construction advantages and performance details refer to Did You Know : www.vishay.com/doc 48567 SOLDER PAD DIMENSIONS RESISTANCE DIMENSIONS in inches (millimeters) CASE in inches (millimeters) RANGE SIZE (m) L W H T1 T2 a b l 0.200 0.008 0.100 0.008 0.020 0.006 0.028 0.008 0.016 0.006 0.049 0.118 0.138 2010 10 to 500 (5.08 0.20) (2.54 0.20) (0.50 0.15) (0.70 0.20) (0.40 0.15) (1.25) (3.00) (3.50) 0.250 0.012 0.125 0.008 0.020 0.006 0.035 0.008 0.020 0.008 0.061 0.142 0.173 2512 10 to 500 (6.35 0.30) (3.18 0.20) (0.50 0.15) (0.90 0.20) (0.50 0.20) (1.55) (3.60) (4.40) RESISTANCE RANGE THERMAL RESISTANCE PRODUCT ALLOY ( ) (C/W) WFMA2010 0.01 to 0.0329 < 30 Mn-Cu WFMB2010 0.033 to 0.5 < 55 Ni-Cr WFMA2512 0.01 to 0.0329 < 25 Mn-Cu WFMB2512 0.033 to 0.5 < 40 Ni-Cr Revision: 05-May-2021 Document Number: 30387 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