WSR Vishay Dale Power Metal Strip(R) Resistors, Low Value, Surface Mount FEATURES * Molded high temperature encapsulation * 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 * All welded construction * Solid metal Nickel-chrome or Manganese-copper alloy resistive element with low TCR (< 20 ppmC) * Solderable terminations * Very low inductance 0.5H to 5H * Excellent frequency response * Low thermal EMF * Lead (Pb)-Free version is RoHS Compliant Pb-free Available e2 RoHS* COMPLIANT STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL SIZE POWER RATING P70C W 0.5% 1.0% WSR2 4527 2.0 0.01 - 1.0 0.001 - 1.0 WSR3 4527 3.0* 0.01 - 0.2 0.001 - 0.2 RESISTANCE RANGE *The WSR3 requires a minimum of 1050 sq. mil. circuit traces connecting to the recommended solder pad * Part Marking: DALE, Model, Value, Tolerance, Date Code TECHNICAL SPECIFICATIONS PARAMETER UNIT WSR2 & WSR3 ppm/C 0.005 - 0.0099 = 110 0.010 - 1.0 = 75 VAC > 500 Insulation Resistance > 109 Operating Temperature Range C - 65/+ 275 Maximum Working Voltage V (P x R)1/2 Weight/1000 pieces (typical) g 440 Temperature Coefficient Dielectric Withstanding Voltage GLOBAL PART NUMBER INFORMATION New Global Part Numbering: WSR25L000FEA (preferred part numbering format) W GLOBAL MODEL WSR2 S R 2 5 L 0 VALUE L = Miliohm R = Decimal 5L000 = 0.005 R0100 = 0.01 Historical Part Number example: WSR2 0.005 0 0 TOLERANCE D = 0.5% F = 1.0% J = 5.0% 1% EA F E A PACKAGING EA = Lead Free, tape/reel EK = Lead Free, Bulk TA = Tin/Lead, tape/reel (R86) BA = Tin/Lead, bulk (B43) SPECIAL (Dash Number) (up to 3 digits) From 1-999 as applicable (will continue to be accepted) WSR2 0.005 1% EA HISTORICAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING * Pb containing terminations are not RoHS compliant, exemptions may apply www.vishay.com 214 For technical questions contact: ww2bresistors@vishay.com Document Number: 30101 Revision: 30-Sep-05 WSR Vishay Dale Power Metal Strip(R) Resistors, Low Value, Surface Mount DIMENSIONS DIMENSIONS in inches [millimeters] MODEL W WSR2 WSR3 H L H T W1 W 0.455 0.032 0.095 0.005 0.100 0.010 0.275 0.005 0.215 0.005 [11.56 0.813] [2.41 0.127] [2.54 0.254] [6.98 0.127] [5.46 0.127] W1 T L SOLDER PAD DIMENSIONS in inches [millimeters] MODEL I b WSR2 WSR3 a b l 0.155 [3.94] 0.230 [5.84] 0.205 [5.21] Rated Power in % a 120 100 80 60 40 20 0 -65 -25 25 Derating 75 125 70 175 225 275 Ambient Temperature C PERFORMANCE TEST TEST LIMITS CONDITIONS OF TEST WSR2 WSR3 (0.5% + 0.0005) R (0.5% + 0.0005) R Thermal Shock - 55C to + 150C, 1000 cycles, 15 minutes at each extreme Short Time Overload WSR2: 5 x rated power for 5 sec. WSR3: 4 x rated power for 5 sec. (0.5% + 0.0005) R (2.0% + 0.0005) R Low Temperature Storage - 65C for 24 hours (0.5% + 0.0005) R (0.5% + 0.0005) R High Temperature Exposure 1000 hours @ + 275C (1.0% + 0.0005) R (1.0% + 0.0005) R Bias Humidity + 85C, 85% RH, 10% Bias, 1000 hours (0.5% + 0.0005) R (0.5% + 0.0005) R Mechanical Shock 100g's for 6 milliseconds, 5 pulses (0.5% + 0.0005) R (0.5% + 0.0005) R Vibration Frequency varied 10 to 2000Hz in one minute, 3 directions, 12 hours (0.5% + 0.0005) R (0.5% + 0.0005) R Load Life 1000 hours @ rated power, + 70C, 1.5 hours "ON", 0.5 hours "OFF" (1.0% + 0.0005) R (2.0% + 0.0005) R Resistance to Solder Heat + 260C Solder, 10 -12 second dwell, 25mm/second emergence (0.5% + 0.0005) R (0.5% + 0.0005) R Moisture Resistance MIL-STD-202 Method 106, 0% power, 7a and 7b not required (0.5% + 0.0005) R (0.5% + 0.0005) R PACKAGING MODEL WSR2 & WSR3 REEL TAPE WIDTH DIAMETER PIECES/REEL CODE 24mm/Embossed Plastic 330mm/13" 1500 EA Embossed Carrier Tape per EIA-481-2. Document Number: 30101 Revision: 30-Sep-05 For technical questions contact: ww2bresistors@vishay.com www.vishay.com 215 Legal Disclaimer Notice Vishay Notice Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc., or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Vishay for any damages resulting from such improper use or sale. Document Number: 91000 Revision: 08-Apr-05 www.vishay.com 1