333 3 WFP www.vishay.com Vishay Dale Power Metal Plate Current Sense Resistors, Low Value (2 m to 8 m), Hybrid Mount, High Power FEATURES 3939 size package with Kelvin terminals Ideal for all types of current sensing and pulse applications including switching and linear power supplies, instruments, power amplifiers, Available shunts, and high power current sensing modules Proprietary processing technique produces low resistance values (2 m to 8 m) Solid metal manganese-copper and nickel- Available chromium alloy resistive element with low TCR LINKS TO ADDITIONAL RESOURCES (< 30 ppm/C) Max. solder temperature up to 280 C / 30 s or 250 C / 5 min 3D Models Available Very low inductance < 10 nH Finishes available for wire bonding, sintering, and soldering (backside) Electroless Nickel Immersion Gold (ENIG) Low thermal EMF (< 2 V/C) AEC-Q200 qualified Material categorization: for definitions of compliance please see www.vishay.com/doc 99912 Note * 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 STANDARD ELECTRICAL SPECIFICATIONS RESISTANCE WEIGHT (1) GLOBAL POWER RATING TOLERANCE SIZE VALUE RANGE (typical) MODEL W % g/1000 pieces WFPA3939 3939 20 at 120 C 1.0, 5.0 0.002 to 0.005 437 WFPB3939 3939 20 at 120 C 1.0, 5.0 0.0051 to 0.008 437 Note (1) Terminal temperature GLOBAL PART NUMBER INFORMATION Global Part Numbering Example: WFPA39392L000FEA W F P A 3 9 3 9 2 L 0 0 0 F E A PACKAGING GLOBAL ELEMENT RESISTANCE TOLERANCE CASE SIZE SPECIAL (1) MODEL MATERIAL VALUE CODE CODE (4 digits) (2 digits) (3 digits) (1 digit) (5 digits) (1 digit) (2 digits) WFP A = CuMn 3939 L = m* F = 1.0 % EA = Dash numbers B = NiCrAl R = decimal J = 5.0 % lead (Pb)-free, 1 thru 99 2L000 = 0.002 tape / reel as applicable R0100 = 0.01 EK = lead (Pb)-free, * Use L for bulk resistance values < 0.01 Notes Resistance values available per WSL decade values (www.vishay.com/doc 30117) (1) Packaging code: EB (lead (Pb)-free) is a non-standard packaging code designating 500 piece reels. This non-standard packaging code is identical to our standard EA (lead (Pb)-free), except that it has a package quantity of 500 pieces Revision: 26-Jan-2021 Document Number: 30394 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 WFP www.vishay.com Vishay Dale TECHNICAL SPECIFICATIONS PARAMETER UNIT 3939 RESISTOR CHARACTERISTICS Temperature coefficient (20 C to 60 C) ppm/C 75 (complete resistor) Temperature coefficient (20 C to 60 C) ppm/C 30 (only element material) Operating temperature range C -65 to +170 Dielectric withstanding V 100 AC 1/2 Maximum working voltage V (P x R) Maximum terminal temperature C 120 DIMENSIONS in inches (millimeters) 0.030 (0.75) 0.012 (0.30) 0.09 0.279 (7.09) 0.025 (0.64) (2.29) 0.122 0.025 (0.64) (3.10) 0.099 0.053 (2.52) (1.36) 0.075 (1.90) 0.394 (10.01) 0.410 (10.41) 0.270 (6.86) 0.270 (6.86) 0.075 (1.90) 0.075 (1.90) 0.071 (1.80) 0.071 (1.80) 0.410 (10.41) 0.394 (10.01) Solder pads Bond area Bond connections Note Thermal resistance (C/W): < 2.5 C/W MIN. MAX. MATERIAL (m) (m) Au 0.05 0.15 Backside finish Ni 3.1 6.1 Au 0.05 0.15 Ni 3.1 6.1 Top side termination Cu (reference only) 50 Ni (WFMB only) < 0.01 Revision: 26-Jan-2021 Document Number: 30394 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