thick film general purpose rk73b ??? flat chip resistors ?construction ??\ coating colorblack Lfeatures ?X? ???????`????? ??????? ?O?3????????m? ?? ?`????N??g?C??? ?`?`???? U?`???rohs??O? ??U?rohsm? small size and light weight. excellent heat resistance and weather resistance are ensured by the use of metal glaze thick film. high stability and high reliability with the triple-layer structure of electrode. applicable to various kinds of automatic mounters for taping, etc. suitable for both flow and reflow solderings. products with lead free termination meet eu-rohs requirements. eu-rohs regulation is not intended for pb-glass contained in electrode, resistor element and glass. ?reference standards iec 60115-8 jis c 5201-8 eiaj rc-2134b ?dimensions ?y-?yy 1 s p u f d u j w f d p b u j o h ?y
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}?y 3 f t j t u j w f p m n ?y o
? ??y * o o f s f m f d u s p e f ?y??-??lv / j q m b u j o h ?yx?i?lv 4 p m e f s q m b u j o h ?y???? $ f s b n j d t v c t u s b u f - d d 8 u e ? ? ? ? ? ? ?type designation example ?Xpderating curve 1 f s d f o u s b u f e q p x f s *?9 sy " n c j f o u u f n q f s b u v s f? k k ??
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8 " ??70???????Xp ???Xp? for resistors operated at an ambient temperature of 70 or above, a power rating shall be derated in accordance with the above derating curve. g?? flat chip resistors 1 rk73b2hrk73b3a?? 1 rk73b2h and rk73b3a are also available. eu rohs 2 ??O??1e1j2a10?1m????? ??????? 3 1f1h??|???t???? 2 products with gold plated electrodes are also available with 1e, 1j and 2a types 10?1m , so please consult with us. 3 with type 1f and 1h, only the symbol t is available as the terminal surface material. ?|U?`??????? h?|??eu-rohs|????????? ?`?????????appendix c? the terminal surface material lead free is standard. contact us when you have control request for environmental hazardous material other than the substance specified by eu-rohs. for further information on taping, please refer to appendix c on the back pages. ??d?????????{????_J ?dC?C?C?v????p???C?????????? specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment. malfunction or failure of the products in such applications may cause loss of human life or serious damage. www.koanet.co.jp type inch size code dimensionsmm weightg 1000pcs l w c d t 1f 01005 0.40.02 0.20.02 0.100.03 0.110.03 0.130.02 0.04 1h 0201 0.60.03 0.30.03 0.10.05 0.150.05 0.230.03 0.14 1e 0402 1.0 . 0.50.05 0.20.1 0.25 . 0.350.05 0.68 1j 0603 1.60.2 0.80.1 0.30.1 0.30.1 0.450.1 2.14 2a 0805 2.00.2 1.250.1 0.40.2 0.3 . 0.50.1 4.54 2b 1206 3.20.2 1.60.2 0.50.3 0.4 0.60.1 9.14 2e 1210 2.60.2 15.5 w2h 2010 5.00.2 2.50.2 0.650.15 24.3 w3a 2512 6.30.2 3.10.2 37.1 0.1 ?0.05 0.05 ?0.1 0.2 ?0.1 0.2 ?0.1 rk73b 2b t td 103 j ?N product code power rating 1f0.03w 1h0.05w 1e0.063w 1j 0.1w 2a0.125 2b0.25w 2e0.33w 0.5w w2h0.75w w3a1w ?| terminal surface material tsn gau 2 lsn/pb 3 ? taping tx4mm width- 1mm pitch plastic embossed ta1mm pitch press paper tbl?tc?tc m 2mm pitch press paper tpl? tp 2mm pitch punch paper t d4mm pitch punch paper t e4mm pitch plastic embossed b kbulk ?? nominal resistance 3 digits ?S? resistance tolerance g2% j 5%
?? rated ambient temperature :70 ??? operating temperature range :?55?1251f?1h, ?55?1551e?1j?2a?2b?2e?w2h?w3a ?performance ratings ?R ???????R??R??? rated voltage power ratingresistance value or max. working voltage, whichever is lower. 4???R^??R????? 4 please consult with us about the max. working voltage and the max. overload voltage with ( ). g?? flat chip resistors ????precautions for use ????????g????S`?`?????R??????? ?????k???w2h?w3a??????????k?????? ????R????????R?????k????????`??Y??? fr-4????????1f?2e?????k??w2h?w3a???k A?????????k?g?????g?????????? ?????????????O? rk73b1f??CM??????k????p???? the substrate of chip resistors is alumina. cracks may occur at the connection of solder (solder fillet portion) due to the difference of the coefficient of thermal expansion from a mounting board when heat stress like heat cycle, etc. are repeatedly given to them. care should be taken to the occurrence of the cracks when the change in ambient temperature or on/off of load is repeated, especially when large types of w2h/w3a which have large thermal expansion and also self heating. by general temperature cycle test using glass-epoxy(fr-4) boards under the maximum/minimum temperatures of operating temperature range, the crack does not occur easily in the types of 1f?2e, but the crack tends to occur in the types of w2h/w3a. the occurrence of the crack by heat stress may be influenced by the size of a pad, solder volume, heat radiation of mounting board etc., so please pay careful attention to designing when a big change in ambient temperature and conditions for use like on/off of load can be assumed. care should be taken that rk73b1f may be damaged when static electricity occurs and is applied in the equipment assembly process. ??d?????????{????_J ?dC?C?C?v????p???C?????????? specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment. malfunction or failure of the products in such applications may cause loss of human life or serious damage. www.koanet.co.jp type ?? S t.c.r. 10 ? 6 /k power rating ? resistance range? ??R max. working voltage ^??R max. overload voltage ???/` packaging & q'ty/reelpcs g2% e24 j5% e24 tx tbl ta t c? tcm tpl? tp td te 1f 250 0.03w 6.8k?1m 6.8k?1m 15v 30v 40,000 20,000 300 10?6.2k 10?6.2k 1h 200 0.05w 10?10m 10?10m 25v 50v 35,000 tc 10,000 tcm15,000 400 1.0?9.1 1e 200 0.063w 1.0?10m 1.0?10m 50v 100v tpl20,000 tp 10,000 1j 200 0.1w 1.0?10m 1.0?10m tp 10,000 5,000 400 11m?22m 2a 200 0.125w 1.0?1m 1.0?1m 150v 200v tp 10,000 5,000 4,000 400 1.1m?10m 1.1m?10m 2b 200 0.25w 1.0?5.6m 1.0?5.6m 200v 400v 5,000 4,000 400 6.2m?10m 6.2m?22m 2e 200 0.5w 10?1k 1.0?1k 5,000 4,000 0.33w 1.1k?5.6m 1.1k?5.6m 400 6.2m?10m w2h 200 0.75w 10?5.6m 1.0?5.6m 4,000 400 6.2m?22m w3a 200 1.0w 10?5.6m 1.0?5.6m 200v 500v 4 400v 500v 4 4,000 400 6.2m?22m ?Y? test items ???performance requirements r0.05? ?Y test methods ^limit ?typical ? resistance ?S? within specified tolerance 25 ???S t.c.r. ? within specified t.c.r. 25/?55 and 25/125 ^???rg overloadshort time 2 11f 0.5another ?R2.55??2b??R2 rated voltage2.5 for 5s2 brated voltage2 for 5s ?? resistance to soldering heat 11f?w3a10?QrQ1m? 31h?w3ar10, r1m? 0.751f, 1h10?QrQ1m? 11j?w3ar10, r1m? 0.5another 2605, 10s1s ?? rapid change of temperature 11f 0.5another 0.51f 0.3another ?5530min./12530min.100 cycles ?? moisture resistance 21j, 2a, 2b 3another 0.751j, 2a, 2b 1.51f 1another 402, 90%?95%rh, 1000h 1.5rg on/0.5rg off 1.5h on/0.5h off cycle 70?? endurance at 70 21j, 2a, 2b 3another 0.751j, 2a, 2b 1another 702, 1000h 1.5rg on/0.5rg off 1.5h on/0.5h off cycle high temperature exposure 1 0.51f 0.3another 125, 1000h1f, 1h 155, 1000h1e, 1j, 2a, 2b, 2e, w2h, w3a
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