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| WSH2818 Vishay Dale Power Metal Strip(R) Resistors, High Power (5 watt) Low Value (down to 0.001 ), 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 * 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 V/C) Pb-free e3 RoHS COMPLIANT STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL WSH2818 POWER RATING P70 C W 5* TOLERANCE % 1.0 RESISTANCE RANGE 0.001 - 0.1 * The WSH2818 is rated at 5 watts with maximum surface temperature of 200 C TECHNICAL SPECIFICATIONS PARAMETER Temperature Coefficient Inductance Operating Temperature Range Maximum Continuous Current Weight/1000 pieces UNIT ppm/C H C A g WSH2818 200 for 1 m to 5.99 m 75 for 6 m to 100 m <5 - 65/+ 170 (P/R)1/2 126 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 WSH2818 RESISTANCE VALUE L = Milliohm* R = Decimal 4L000 = 0.004 R0100 = 0.01 * use "L" for resistance values < 0.01 TOLERANCE CODE F = 1.0 % J = 5.0 % PACKING CODE EA = Lead (Pb)-free, Tape/Reel EK = Lead (Pb)-free, Bulk SPECIAL (Dash number up to 2 digits) From 1 - 99 as applicable www.vishay.com 200 For technical questions contact: ww2bresistors@vishay.com Document Number: 30120 Revision: 20-Apr-06 WSH2818 Power Metal Strip(R) Resistors, High Power (5 watt) Low Value (down to 0.001 ), Surface Mount DIMENSIONS DIMENSIONS in inches [millimeters] L H Vishay Dale MODEL RESISTANCE RANGE 0.006 - 0.1 L W H T T 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] 0.280 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] W WSH2818 0.001 - 0.0059 a SOLDER PAD DIMENSIONS in inches [millimeters] b a c MODEL a WSH2818 0.138 [3.5] b 0.200 [5.1] C 0.024 [0.61] RATED POWER IN % 120 100 80 60 40 20 0 - 65 - 50 - 25 0 25 50 75 70 100 125 150 170 DERATING AMBIENT TEMPERATURE IN C PERFORMANCE TEST Thermal Shock Short Time Overload Low Temperature Operation High Temperature Exposure Bias Humidity Mechanical Shock Vibration Load Life Resistance to Solder Heat Moisture Resistance CONDITIONS OF TEST - 55 C to + 150 C, 1000 cycles, 15 minutes at each extreme 4 x rated power for 5 seconds - 65 C for 45 minutes 1000 hours at + 170 C + 85 C, 85 % RH, 10 % Bias, 1000 hours 100 g's for 6 milliseconds, 5 pulses Frequency varied 10 to 2000 Hz in one minute, 3 directions, 12 hours 1000 hours at + 70 C, 1.5 hours "ON", 0.5 hours "OFF" + 260 C Solder, 10 - 12 second dwell, 25 mm/second emergence MIL-STD-202, Method 106, 0 % power, 7b not required TEST LIMITS 0.5 % R 1.0 % R 0.5 % R 1.0 % R 0.5 % R 0.5 % R 0.5 % R 1.0 % R 0.5 % R 0.5 % R PACKING REEL MODEL TAPE WIDTH WSH2818 16 mm/Embossed Plastic DIAMETER 330 mm/13" PIECES/REEL 3500 CODE EA Embossed carrier tape per EIA-481-2 Document Number: 30120 Revision: 20-Apr-06 For technical questions contact: ww2bresistors@vishay.com 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 |
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