document number: 20128 for technical questions, contact: filmresistorsleaded@vishay.com www.vishay.com revision: 26-may-10 1 high power metal oxide leaded resistors wk/wr vishay draloric features ? rugged metal oxide film ? high power dissipation in small size (1 w/0207 size to 4 w/0922 size) ? high temperature coating (up to 200 c), non-flammable ? lead (pb)-free solder contacts ? pure tin plating provides compat ibility with lead (pb)-free and lead containing soldering processes ? compliant to rohs directive 2002/95/ec notes ? coating: green ? marking: wk2 and wr4 have color code band marking. tcr band wi ll be given to only wk2, 100 ppm, 5 %. wr5 and wk8 are printed marked. notes (1) rated voltage (2) for values < 10r the upper limiting temper ature is 155 c. the power rati ng is corresponding ly lower and can be calculated by r th . standard electrical specifications model size rated dissipation p 70 w limiting element voltage u max. v ? temperature coefficient ppm/k tolerance % resistance range ? e-series wk2 0207 1.0 500 50 1 4.7 to 1m e24, e96 wk2 0207 1.0 500 100 2 5 4.7 to 1m 4.7 to 1m e24, e48 e24 wk2 0207 1.0 500 200 5 0.22 to 1m e24 wr4 0414 2.0 500 200 2 5 1 to 1m 0.33 to 1m e24, e48 e24 wr5 0617 3.0 750 200 2 5 1 to 100k 0.22 to 560k e24, e48 e24 wk8 0922 4.0 750 200 2 5 1 to 68k 0.22 to 100k e24, e48 e24 technical specifications parameter unit wk2 wr4 wr5 wk8 rated dissipation, p 70 w 1.0 2.0 3.0 4.0 limiting element voltage, u max. (1) v ? 500 500 750 750 insulation voltage, u ins (1 min) v > 500 > 500 > 500 > 500 thermal resistance, r th k/w ? 140 ? 100 ? 70 ? 60 insulation resistance ? > 109 category temperature range (2) c - 55 to + 200 failure rate 10 -8 /h < 1 weight g 0.2 0.7 1.5 3.5 p x r
www.vishay.com for technical questions, contact: filmresistorsleaded@vishay.com document number: 20128 2 revision: 26-may-10 wk/wr vishay draloric high power metal oxide leaded resistors notes ? the part number shown above is to facilitate the unified part numbering system for ordering products (1) please refer to table packaging part number and product description wk2-series part number: wk202070c1001fd500 model/size variant tcr value tolerance packaging (1) special wk20207 0 = neutral c = 50 ppm/k b = 100 ppm/k a = 200 ppm/k 3 digit value 1 digit multiplier multiplier f = 1 % g = 2 % j = 5 % 22 = a2 25 = a5 d5 = r5 up to 2 digits 00 = standard 7 = *10 -3 8 = *10 -2 9 = *10 -1 0 = *10 0 1 = *10 1 2 = *10 2 3 = *10 3 4 = *10 4 5 = *10 5 6 = *10 6 product description: wk2 50 1k0 1 % r5 wk2 50 1k0 1 % r5 model tcr resistance value tolerance packaging (1) wk2 50 ppm/k 100 ppm/k 200 ppm/k 49k9 = 49.9 k ? 50r1 = 50.1 ? 1k0 = 1.0 k ? 1 % 2 % 5 % a2 a5 r5 part number and product description wk8-series part number: wk80922001000j5c00 model/size variant tcr value tolerance packaging (1) special wk80922 0 = neutral 0 = standard 3 digit value 1 digit multiplier multiplier g = 2 % j = 5 % 5c = ac g1 = r1 up to 2 digits 00 = standard 7 = *10 -3 8 = *10 -2 9 = *10 -1 0 = *10 0 1 = *10 1 2 = *10 2 3 = *10 3 4 = *10 4 5 = *10 5 product description: wk8 100r 5 % ac wk8 100r 5 % ac model tcr tolerance packaging (1) wk8 100r = 100 ? 47k = 47 k ? 2 % 5 % ac r1 part number and product description wr-series part number: wr404140a1001gfe00 model/size variant tcr value tolerance packaging (1) special wr40414 wr50617 0 = neutral a = 200 ppm/k 3 digit value 1 digit multiplier multiplier g = 2 % j = 5 % 41 = a1 g73 51 = a1 g77 fe = re g73 gp = rp up to 2 digits 00 = standard 7 = *10 -3 8 = *10 -2 9 = *10 -1 0 = *10 0 1 = *10 1 2 = *10 2 3 = *10 3 4 = *10 4 5 = *10 5 6 = *10 6 product description: wr4 1k0 2 % re wr4 1k0 2 % re model resistance value tolerance packaging (1) wr4 wr5 1k0 = 1.0 k ? 51r0 = 51.0 ? 2 % 5 % a1 (g73) a1 (g77) re (g73) rp 02 10 1fd 0 k2 50 w 70 0 0 c 09 10 0j5 0 k8 c0 w 20 2 0 0 04 10 1gf 0 r4 e0 w 40 1 0 a
document number: 20128 for technical questions, contact: filmresistorsleaded@vishay.com www.vishay.com revision: 26-may-10 3 wk/wr high power metal oxide leaded resistors vishay draloric dimensions notes ? taping in acc. with iec 60286-1 ? d and l measured in acc. with iec 60294 ? d according to iec 60301 (1) 9 mm for wr5/wk8 packaging model reel box pieces/reel code min. order qty packaging units pieces/box code min. order qty packaging units wk2 5000 r5 1 5000 2000 a5 a2 1 1 wr4 2500 re 2 1000 a1 (g73) 2 wr5 1500 rp 2 1000 a1 (g77) 2 wk8 1000 r1 2 500 ac 2 l 1 l d d b e 6 mm (1) model dimensions (in millimeters) dll 1 max. bde wk2 2.5 - 0.5 6.5 - 0.5 8.0 53 1 0.6 7.5 wr4 3.9 - 0.5 10.0 - 1.6 12.0 73 1 0.8 15.0 wr5 6.0 - 0.5 16.5 - 1.5 20.0 77 1 0.8 17.5 wk8 9.0 - 0.5 20.0 - 1.5 24.0 77 1 0.8 22.5 120 100 8 0 60 40 20 0 - 55 0 40 8 0 120 160 200 240 2 8 0 320 360 70 ambient temperature in c derating % n i r e w o p d e t a r 300 250 200 150 100 50 0 0 1.0 2.0 3.0 4.0 5.0 power in w temperature rise c n i e s i r e r u t a r e p m e t wr4 wk2 wr5 wk 8 wr 5 wr 4 wk 8 wk 2 10 wr 5 wr 4 wk 8 wk 2 10 -5 10 -4 10 0 10 -1 10 0 10 10 1 10 -1 10 -2 10 0 10 -3 10 2 10 -1 10 -5 10 -4 10 -3 10 -2 10 3 ] w [ p g n i t a r r e w o p ] w [ g n i t a r r e w o p pulse rating o secondary conditions: a) ? b) ? u 70 c c) ? max. see diagram below d) ~ 10r secondary conditions: a) 70 (permissible constant power at ? u = 70 c) b) ? u 70 c c) ? max. see diagram below d) ~ 10r p square pulse i [s] t square pulse i [s] t p pulse rating 70 pp p pp wk2 wr4 wr5 wk 8 10 0 10 1 10 2 10 -1 10 3
www.vishay.com for technical questions, contact: filmresistorsleaded@vishay.com document number: 20128 4 revision: 26-may-10 wk/wr vishay draloric high power metal oxide leaded resistors note (1) limits for change of resistance at test non-linearity ] b d [ 3 a y t i r a e n i l - n o n 130 120 110 100 90 1k 10k 100k 1m 10m resistance value in wr4 wr5/wk 8 current noise 10 1 0.1 0.01 e s i o n t n e r r u c v / v wr4 10k 100k 1m 10m resistance value in 2000 1000 0 wr 5/wk 8 wr 4 max. pulse voltage wk 2 10 -5 10 -4 10 -2 10 -3 10 -1 10 10 0 wr5/wk 8 secondary conditions: a) max. see diagram below b) see diagram below c) ? u 70 c p ? max. [v] e g a t l o v e s l u p ? square pulse i [s] t performance test conditions of test requirements ( ? r max.) (1) rated dissipation, p 70 iec 60115-1, 4.25.1 1000 h at 70 c 1.5 h on, 0.5 h off wk2 ? (5 % r + 0.1 ? ) wk8 ? (2 % r + 0.1 ? ) wr4, wr5 ? (5 % r + 0.1 ? ) endurance at uct iec 60115-1, 4.25.3 1000 h at 200 c without load wk2, wr4 ? (5 % r + 0.1 ? ) wr5, wk8 ? (1 % r + 0.1 ? ) overload test iec 60115-1, 4.13 short time overload 5 s at 2.5 x rated voltage or ? twice the limiting element voltage ? (0.25 % r + 0.05 ? ) thermal shock iec 60115-1, 4.19 rapid change between upper an d lower category temperature ? (0.25 % r + 0.05 ? ) climatic sequence iec 60115-1, 4.23 dry heat, damp heat cycle, cold, low air pressure ? (0.5 % r + 0.1 ? ) damp heat steady state iec 60115-1, 4.24 56 days; 40 c; 90 % to 95 % rh; loaded with 0.01 p 70 ? (1.5 % r + 0.1 ? ) resistance to soldering heat iec 60115-1, 4.18 10 s at 260 c solder bath temperature ? (0.25 % r + 0.05 ? ) robustness of terminations iec 60115-1, 4.16 tensile, bending and torsion ? (0.25 % r + 0.05 ? ) vibration iec 60115-1, 4.22 frequency 10 hz to 500 hz; displacement 1.5 mm or acceleration 10 g; th ree directions; 6 h ? (0.25 % r + 0.05 ? ) applicable specifications ? en140100, en60115-1, iec 60115-1
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