Product is End of Life May-2016 and Replaced by WSHM2818 WSH2818 www.vishay.com Vishay Dale Power Metal Strip(R) Resistors, High Power (5 W), 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 amplifier * Proprietary processing technique produces extremely low resistance values * All welded construction * Very low inductance (< 5 nH) * Excellent frequency response to 50 MHz * Solid metal nickel-chrome or manganesecopper alloy resistive element with low TCR (< 20 ppm/C) * Low thermal EMF (< 3 V/C) * AEC-Q200 qualified (1) * PATENT(S): www.vishay.com/patents * Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 Product Termination Notice: PCN-DR-028-2015-Rev-0 For documentation go to: www.vishay.com/quality/pcn-search/. Enter search for resistors, Vishay Dale, and product termination. Technical Note: WSHM / WSH Side by Side Comparison for a Drop-In Replacement Part: www.vishay.com/doc?30305. Note (1) Flame retardance test may not be applicable to some resistor technologies STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL SIZE POWER RATING P70 C W TOLERANCE % RESISTANCE VALUE RANGE WEIGHT (typical) g/1000 pieces WSH2818 2818 5 (1) 1.0 0.001 to 0.1 126 Note (1) The WSH2818 is rated at 5 W with maximum surface temperature of 200 C TECHNICAL SPECIFICATIONS PARAMETER UNIT RESISTOR CHARACTERISTICS ppm/C 200 for 1 m to 5.99 m 75 for 6 m to 100 m Inductance nH <5 Operating temperature range C -65 to +170 Maximum continuous current A (P/R)1/2 Temperature coefficient GLOBAL PART NUMBER INFORMATION Global Part Numbering example: WSH2818R1000FEA W S H 2 8 1 8 R 1 0 0 0 F E A GLOBAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING CODE SPECIAL WSH2818 L = m* R = Decimal 4L000 = 0.004 R0100 = 0.01 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 to 99 as applicable * Use "L" for resistance values < 0.01 PATENT(S): www.vishay.com/patents This Vishay product is protected by one or more United States and international patents. Revision: 21-Jun-2018 Document Number: 30120 1 For technical questions, contact: ww2bresistors@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Product is End of Life May-2016 and Replaced by WSHM2818 WSH2818 www.vishay.com Vishay Dale DIMENSIONS in inches (millimeters) L H a T b l a W RESISTANCE RANGE MODEL 0.006 to 0.1 WSH2818 0.001 to 0.0059 DIMENSIONS L W 0.280 0.010 (7.1 0.25) 0.180 0.010 (4.6 0.25) SOLDER PAD DIMENSIONS H 0.032 0.010 (0.813 0.25) 0.045 0.010 (1.143 0.25) T a b l 0.125 0.010 (3.18 0.25) 0.138 (3.5) 0.200 (5.1) 0.024 (0.61) Rated Power in % DERATING 120 100 80 60 40 20 0 - 65 - 50 - 25 0 25 50 75 100 125 150 170 Ambient Temperature in C 70 PERFORMANCE TEST CONDITIONS OF TEST TEST LIMITS Thermal shock -55 C to +150 C, 1000 cycles, 15 min at each extreme 0.5 % R Short time overload 4x rated power for 5 s 1.0 % R Low temperature operation -65 C for 45 min 0.5 % R High temperature exposure 1000 h at +170 C 1.0 % R Bias humidity +85 C, 85 % RH, 10 % bias, 1000 h 0.5 % R Mechanical shock 100 g's for 6 ms, 5 pulses 0.5 % R Vibration Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h 0.5 % R Load life 1000 h at 70 C, 1.5 h "ON", 0.5 h "OFF" 1.0 % R Resistance to solder heat +260 C solder, 10 s to 12 s dwell, 25 mm/s emergence 0.5 % R Moisture resistance MIL-STD-202, method 106, 0 % power, 7b not required 0.5 % R PACKAGING MODEL WSH2818 REEL TAPE WIDTH DIAMETER PIECES/REEL CODE 16 mm/embossed plastic 330 mm/13" 3500 EA Note * Embossed Carrier Tape per EIA-481 Revision: 21-Jun-2018 Document Number: 30120 2 For technical questions, contact: ww2bresistors@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. 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 in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. 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