WSH2818 Vishay Dale Power Metal Strip® Resistors, High Power (5 watt) Low Value (down to 0.001 Ω), Surface Mount FEATURES • Improved thermal management incorporated into design • 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 Pb-free e3 RoHS COMPLIANT • All welded construction • Solid metal Nickel-chrome or Manganese-copper alloy resistive element with low TCR (< 20 ppm/°C) • Lead (Pb)-free construction • Very low inductance (< 5 nH) • Excellent frequency response to 50 MHz • Low thermal EMF (< 3 µV/°C) STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL POWER RATING P70 °C W TOLERANCE % RESISTANCE RANGE Ω WSH2818 5* 1.0 0.001 - 0.1 * The WSH2818 is rated at 5 watts with maximum surface temperature of 200 °C TECHNICAL SPECIFICATIONS PARAMETER Temperature Coefficient UNIT WSH2818 ppm/°C ± 200 for 1 mΩ to 5.99 mΩ ± 75 for 6 mΩ to 100 mΩ Inductance ηH <5 Operating Temperature Range °C - 65/+ 170 Maximum Continuous Current A (P/R)1/2 Weight/1000 pieces g 126 GLOBAL PART NUMBER INFORMATION Global Part Numbering: WSH2818R1000FEA W S H 2 8 1 8 R 1 0 0 0 F E A GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKING CODE SPECIAL WSH2818 L = Milliohm* R = Decimal 4L000 = 0.004 Ω R0100 = 0.01 Ω F = ± 1.0 % J = ± 5.0 % EA = Lead (Pb)-free, Tape/Reel EK = Lead (Pb)-free, Bulk (Dash number up to 2 digits) From 1 - 99 as applicable * use “L” for resistance values < 0.01 Ω www.vishay.com 200 For technical questions contact: [email protected] Document Number: 30120 Revision: 20-Apr-06 WSH2818 Power Metal Strip® Resistors, High Power (5 watt) Low Value (down to 0.001 Ω), Surface Mount Vishay Dale DIMENSIONS DIMENSIONS in inches [millimeters] L MODEL RESISTANCE RANGE Ω H W H T 0.006 - 0.1 0.280 ± 0.010 0.180 ± 0.010 0.032 ± 0.010 0.125 ± 0.010 [7.1 ± 0.25] [4.6 ± 0.25] [0.813 ± 0.25] [3.18 ± 0.25] 0.001 - 0.0059 0.280 ± 0.010 0.180 ± 0.010 0.045 ± 0.010 0.125 ± 0.010 [7.1 ± 0.25] [4.6 ± 0.25] [1.143 ± 0.25] [3.18 ± 0.25] T W L WSH2818 a SOLDER PAD DIMENSIONS in inches [millimeters] b MODEL c a RATED POWER IN % WSH2818 a b C 0.138 [3.5] 0.200 [5.1] 0.024 [0.61] 120 100 80 60 40 20 0 - 65 - 50 - 25 0 25 50 75 100 125 150 170 AMBIENT TEMPERATURE IN °C DERATING 70 PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS Thermal Shock - 55 °C to + 150 °C, 1000 cycles, 15 minutes at each extreme ± 0.5 % ΔR Short Time Overload 4 x rated power for 5 seconds ± 1.0 % ΔR Low Temperature Operation - 65 °C for 45 minutes ± 0.5 % ΔR High Temperature Exposure 1000 hours at + 170 °C ± 1.0 % ΔR Bias Humidity + 85 °C, 85 % RH, 10 % Bias, 1000 hours ± 0.5 % ΔR Mechanical Shock 100 g’s for 6 milliseconds, 5 pulses ± 0.5 % ΔR Vibration Frequency varied 10 to 2000 Hz in one minute, 3 directions, 12 hours ± 0.5 % ΔR Load Life 1000 hours at + 70 °C, 1.5 hours “ON”, 0.5 hours “OFF” ± 1.0 % ΔR Resistance to Solder Heat + 260 °C Solder, 10 - 12 second dwell, 25 mm/second emergence ± 0.5 % ΔR Moisture Resistance MIL-STD-202, Method 106, 0 % power, 7b not required ± 0.5 % ΔR PACKING REEL MODEL WSH2818 TAPE WIDTH DIAMETER PIECES/REEL CODE 16 mm/Embossed Plastic 330 mm/13" 3500 EA Embossed carrier tape per EIA-481-2 Document Number: 30120 Revision: 20-Apr-06 For technical questions contact: [email protected] www.vishay.com 201 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