WSF Vishay Dale Metal Film Resistors, Power, Surface Mount FEATURES * Molded encapsulation * Wraparound Compliant Terminations eliminate risk of solder fillet cracking Pb-free Available e3 * Solderable terminations * Excellent stability at different environmental conditions * High power ratings (up to 2 W) RoHS* COMPLIANT STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL POWER RATING P70 C W SIZE INCH TOLERANCE % RESISTANCE RANGE ENCAPSULATION WSF2012 2012 0.5 0.5, 1, 5 5.0 - 1.43K 1) Epoxy WSF2515 2515 1.0 0.5, 1, 5 10 - 10K Thermoplastic WSF4527 4527 2.02) 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 Temperature Coefficient Dielectric Withstanding Voltage UNIT WSF2012 WSF2515 WSF4527 ppm/C 100 3) 100 3) 100 3) VAC > 500 > 500 > 500 Insulation Resistance Operating Temperature Range C - 65/+ 175 - 65/+ 175 - 65/+ 150 Maximum Working Voltage V R)1/2 R)1/2 (P x R)1/2 4) Weight/1000 pieces (typical) g > 109 (P x (P x 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 PART NUMBER INFORMATION New Global Part Numbering: WSF25151K500JKTA (preferred part numbering format) W S GLOBAL MODEL WSF2012 WSF2515 WSF4527 F 2 5 VALUE R = decimal K = thousand 54R15 = 54.15 1K325 = 1.325 k 1 5 1 TOLERANCE D = 0.5 % F = 1.0 % G = 2.0 % H = 3.0 % J = 5.0 % K = 10 % K 5 0 TCR E = 25 ppm/C H = 50 ppm/C K = 100 ppm/C 0 J K T A PACKAGING EA = Lead (Pb)-free, tape/reel EK = Lead (Pb)-free, bulk TA = Tin/Lead, tape/reel (R86) BA = Tin/Lead, bulk (B43) SPECIAL (Dash Number) (up to 2 digits) From 1 - 99 as applicable 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 CODE TEMPERATURE COEFFICIENT PACKAGING * Pb containing terminations are not RoHS compliant, exemptions may apply Document Number: 30104 Revision: 02-Aug-07 For technical questions, contact: ww2aresistors@vishay.com www.vishay.com 233 WSF Metal Film Resistors, Power, Surface Mount Vishay Dale DIMENSIONS DIMENSIONS in inches [millimeters] MODEL W H W 1 L H T W1 W WSF2012 0.200 0.020 [5.08 0.508] 0.096 0.015 0.040 0.010 0.125 0.005 0.050 0.005 [2.44 0.381] [1.02 0.254] [3.18 0.127] [1.27 0.127] WSF2515 0.250 0.020 [6.35 0.508] 0.110 0.015 0.045 0.010 0.150 0.005 0.098 0.005 [2.79 0.381] [1.14 0.254] [3.81 0.127] [2.49 0.127] 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 l a b 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] WSF4527 0.155 [3.94] 0.230 [5.94] 0.205 [5.21] 200 Rated Power In % Temperature Rise in C a 150 WSF4527 WSF2515 SOLDER PAD DIMENSIONS in inches [millimeters] MODEL b 100 WSF2012 120 100 80 60 WSF2012 WSF2515 40 50 20 WSF4527 0 0 0.5 1.0 1.5 Temperature Rise 0 - 65 2.0 Power in W - 25 0 25 50 Derating 75 100 125 150 175 200 Ambient Temperature in C 70 PERFORMANCE TEST CONDITIONS OF TEST Thermal Shock TEST LIMITS - 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 g's 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 MODEL REEL 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 234 For technical questions, contact: ww2aresistors@vishay.com Document Number: 30104 Revision: 02-Aug-07 Legal Disclaimer Notice Vishay Disclaimer All product specifications and data are subject to change without notice. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document Number: 91000 Revision: 18-Jul-08 www.vishay.com 1