www.vishay.com for technical questions, contact: ww2bresistors@vishay.com document number: 30120 390 revision: 08-dec-10 wsh2818 vishay dale power metal strip ? resistors, high power (5 w) low value (down to 0.001 ), surface mount features ? improved thermal mana gement 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) ? solid metal nickel-chrome or manganese-copper alloy resistive element with low tcr (< 20 ppm/c) ? excellent frequency response to 50 mhz ? low thermal emf (< 3 v/c) ? aec-q200 qualified (1) ? compliant to rohs directive 2002/95/ec note (1) flame retardance test may not be a pplicable to some resistor technologies. note (2) the wsh2818 is rated at 5 w with ma ximum surface temperature of 200 c. standard electrical specifications global model size power rating p 70 c w tolerance % resistance value range weight (typical) g/1000 pieces wsh2818 2818 5 (2) 1.0 0.001 to 0.1 126 technical specifications parameter unit resistor characteristics temperature coefficient 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 global part number information global part numbering example: wsh2818r1000fea global model resistance value tolerance code packaging code special wsh2818 l = m * r = decimal 4l000 = 0.004 r0100 = 0.01 * use l for resistance values < 0.01 f = 1.0 % j = 5.0 % ea = lead (pb)-f ree, tape/reel ek = lead (pb)-free, bulk (dash number) (up to 2 digits) from 1 to 99 as applicable ** please see document vishay material category policy: www.vishay. com/doc?99902 w s h 2 8 1 8 r 1 0 0 0 f e a
document number: 30120 for tec hnical questions, contact: ww2bresistors@vishay.com www.vishay.com revision: 08-dec-10 391 wsh2818 power metal strip ? resistors, high power (5 w) low value (down to 0.001 ), surface mount vishay dale dimensions in inches (millimeters) derating note ? embossed carrier tape per eia-481 . model resistance range dimensions solder pad dimensions lwhtabl wsh2818 0.006 to 0.1 0.280 0.010 (7.1 0.25) 0.180 0.010 (4.6 0.25) 0.032 0.010 (0.813 0.25) 0.125 0.010 (3.18 0.25) 0.138 (3.5) 0.200 (5.1) 0.024 (0.61) 0.001 to 0.0059 0.045 0.010 (1.143 0.25) 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 4 x 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, meth od 106, 0 % power, 7b not required 0.5 % r l w t h b a a l 70 120 100 80 60 40 20 0 - 65 - 50 - 25 0 25 50 75 100 125 150 170 ambient temperature in c rated power in % packaging model reel tape width diameter pieces/reel code wsh2818 16 mm/embossed plastic 330 mm/13" 3500 ea
document number: 91000 www.vishay.com revision: 18-jul-08 1 disclaimer legal disclaimer notice vishay 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 fo r any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. vishay disclaims any and all li ability arising out of the use or application of any product describ ed herein or of any information provided herein to the maximum extent permit ted by law. the product specifications do not expand or otherwise modify vishay?s terms and conditions of purcha se, 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 medi cal, 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.
|
