WSF Vishay Dale Metal Film Resistors, Power, Surface Mount FEATURES Molded encapsulation Pb-free Wraparound Compliant Terminations eliminate Available risk of solder fillet cracking Solderable terminations e3 Excellent stability at different environmental RoHS* conditions COMPLIANT High power ratings (up to 2 W) STANDARD ELECTRICAL SPECIFICATIONS POWER RATING RESISTANCE GLOBAL SIZE TOLERANCE P RANGE ENCAPSULATION 70 C MODEL INCH % W 1) WSF2012 2012 0.5 0.5, 1, 5 5.0 - 1.43K Epoxy WSF2515 2515 1.0 0.5, 1, 5 10 - 10K Thermoplastic 2) WSF4527 4527 2.0 0.5, 1, 5 10 - 100K Thermoplastic Notes 1) E96 values only 2) Resistance values above 31 250 are limited to 250 maximum working voltage Part Marking: 1/2 W - DALE, Value 1 W - Model, Value, Tolerance, Date Code 2 W - DALE, Model, Value, Tolerance, Date Code. TECHNICAL SPECIFICATIONS PARAMETER UNIT WSF2012 WSF2515 WSF4527 3) 3) 3) Temperature Coefficient ppm/C 100 100 100 Dielectric Withstanding Voltage V > 500 > 500 > 500 AC 9 Insulation Resistance > 10 Operating Temperature Range C - 65/+ 175 - 65/+ 175 - 65/+ 150 1/2 1/2 1/2 4) Maximum Working Voltage V (P x R) (P x R) (P x R) Weight/1000 pieces (typical) g 90 165 760 Notes 3) 50 ppm/C and 25 ppm/C available 4) Resistance values above 31 250 are limited to 250 V maximum working voltage GLOBAL PA RT NUMBER INFORMA TION New Global Part Numbering: WSF25151K500JKT A (preferred part numbering format) W SF2 5 1 5 1 K 5 0 0 JK T A GLOBAL MODEL VALUE TOLERANCE TCR PACKAGING SPECIAL WSF2012 R = decimal D = 0.5 % E = 25 ppm/C EA = Lead (Pb)-free, tape/reel (Dash Number) WSF2515 K = thousand F = 1.0 % H = 50 ppm/C EK = Lead (Pb)-free, bulk (up to 2 digits) WSF4527 54R15 = 54.15 G = 2.0 % K = 100 ppm/C From 1 - 99 as TA = Tin/Lead, tape/reel (R86) 1K325 = 1.325 k H = 3.0 % applicable BA = Tin/Lead, bulk (B43) J = 5.0 % K = 10 % Historical Part Number example: WSF2515 1.5 k 5 % 100 ppm/C R86 (will continue to be accepted) WSF2515 1.5 k 5 % 100 ppm/C R86 HISTORICAL MODEL RESISTANCE VALUE TOLERANCE TEMPERATURE PACKAGING CODE COEFFICIENT * Pb containing terminations are not RoHS compliant, exemptions may apply Document Number: 30104 For technical questions, contact: ww2aresistors vishay.com www.vishay.com Revision: 02-Aug-07 233WSF Metal Film Resistors, Power, Surface Mount Vishay Dale DIMENSIONS DIMENSIONS in inches millimeters MODEL LH T W W 1 W WSF2012 0.200 0.020 0.096 0.015 0.040 0.010 0.125 0.005 0.050 0.005 H 5.08 0.508 2.44 0.381 1.02 0.254 3.18 0.127 1.27 0.127 WSF2515 0.250 0.020 0.110 0.015 0.045 0.010 0.150 0.005 0.098 0.005 6.35 0.508 2.79 0.381 1.14 0.254 3.81 0.127 2.49 0.127 W 1 WSF4527 0.455 0.020 0.167 0.010 0.100 0.010 0.275 0.005 0.215 0.005 11.56 0.508 4.24 0.254 2.54 0.254 6.98 0.127 5.46 0.127 T L SOLDER PAD DIMENSIONS in inches millimeters MODEL l b ab l WSF2012 0.085 2.16 0.070 1.78 0.080 2.03 WSF2515 0.090 2.29 0.115 2.92 0.120 3.05 a WSF4527 0.155 3.94 0.230 5.94 0.205 5.21 200 120 100 150 80 WSF4527 WSF2515 100 WSF2012 60 W SF2012 WSF2515 40 50 20 WSF4527 0 0 0 0.5 1.0 1.5 2.0 - 65 - 25 0 255 07 5 100 125 150 175 200 Power in W Ambient T emperature in C Temperature Rise Derating 70 PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS Thermal Shock - 55 C to + 150 C, 1000 cycles, 15 minutes at each extreme (1.0 % + 0.05 ) R Short Time Overload 5 x rated power for 5 seconds (0.5 % + 0.05 ) R Low Temperature Storage - 65 C for 24 hours (0.5 % + 0.05 ) R High Temperature Exposure 1000 hours at + 175 C (150 C for WSF4527) (1.0 % + 0.05 ) R Bias Humidity + 85 C, 85 % RH, 10 % Bias, 1000 hours (0.5 % + 0.05 ) R Moisture Resistance MIL-STD-202 Method 106, 0 % Power, 7a and 7b not required (0.5 % + 0.05 ) R Mechanical Shock 100 gs for 11 milliseconds, 5 pulses (0.5 % + 0.05 ) R Vibration Frequency varied 10 to 500 Hz in one minute, 3 directions, 9 hours (0.5 % + 0.05 ) R Load Life 1000 hours at rated power, + 70 C, 1.5 hours ON, 0.5 hours OFF (1.0 % + 0.05 ) R Resistance to Solder heat + 260 C solder, 10 - 12 second dwell, 25 mm/second emergence (0.5 % + 0.05 ) R PACKAGING REEL MODEL TAPE WIDTH DIAMETER PIECES/REEL CODE WSF2012 12 mm/Embossed Plastic 330 mm/13 2000 EA/TA WSF2515 16 mm/Embossed Plastic 330 mm/13 2000 EA/TA WSF4527 24 mm/Embossed Plastic 330 mm/13 1200 EA/TA Embossed Carrier Tape per EIA 481-1, 2. www.vishay.com For technical questions, contact: ww2aresistors vishay.com Document Number: 30104 234 Revision: 02-Aug-07 Temperature Rise in C Rated Power In %