vitreous enamelled wirewound resistors w20 series cecc approved suitable for harsh environments impervious lead free vitreous enamel coatng overload characteristcs ideal for protecton circuits high stability and reliability high power dissipaton for size 09.14 general note tt electronics reserves the right to make changes in product specifcation without notice or liability. all information is subject to tt electronics own data and is considered accurate at time of going to print. ? tt electronics plc www.ttelectronicsresistors.com ma ke p ossibl e resistors all pb-free parts comply with eu directve 2011/65/eu (rohs2) vitreous enamelled wirewound resistors w20 series www.bitechnologies.com www.irctt.com www.welwyn-tt.com general note tt electronics reserves the right to make changes in product specifcation without notice or liability. all information is subject to tt electronics own data and is considered accurate at time of going to print. ? tt electronics plc 10. 13 cecc approved suitable for harsh environments impervious lead free vitreous enamel coating overload characteristics ideal for protection circuits high stability and reliability high power dissipation for size v itr eous enamelled w i r ewound resistors w20 series ? cecc appr oved ? suitable for harsh envir onments ? impervious lead fr ee vitr eous enamel coating ? overload characteristics ideal for pr otection cir cuits ? high stability and r eliability ? high power dissipation for size dimensions (mm) and w eight (g) t ype l max d max f min d nom wt.nom w21 12.7 5.6 22.75 0.8 1 w215 22.0 7.0 23.1 0.8 2 w22 22.0 8.0 23.1 0.8 2 w23 38.0 8.0 - 0.8 3.5 w24 53.5 8.0 - 0.8 5 general note w elwyn components r eserves the right to make changes in pr oduct specification without notice or liability . all information is subject to w elwyn? s own data and is consider ed accurate at time of going to print. ? w elwyn components limited bedlington, northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com w ebsite: www .welwyn-tt.com this table indicates the cecc specification requirements, and these are met or exceeded by the corresponding w20 series products 4 2 w 3 2 w 2 2 w 5 1 2 w 1 2 w l a i c r e m m o c 0 . 4 1 5 . 0 1 0 . 7 0 . 5 0 . 3 s t t a w c 5 2 t a g n i t a r r e w o p k 0 0 1 o t r 1 k 0 6 o t r 1 k 2 2 o t r 1 k 5 1 o t r 1 k 0 1 o t r 1 s m h o e c n a r e l o t % 1 t a e g n a r e c n a t s i s e r k 0 0 1 o t r 1 k 0 6 o t r 1 k 2 2 o t 5 r 0 k 5 1 o t 5 r 0 k 0 1 o t 5 r 0 s m h o e c n a r e l o t % 2 k 0 0 1 o t 2 r 0 k 0 6 o t 5 1 r 0 k 2 2 o t 1 r 0 k 5 1 o t 1 r 0 k 0 1 o t 1 r 0 s m h o e c n a r e l o t % 5 + < : y l l a c i p y t c m/ p p ) c 0 0 2 o t 5 5 - ( r c t -75 maximum: +-200 bs cecc 40-201-002 requirements style jb hb kb lb mb 0 . 4 1 5 . 0 1 0 . 7 0 . 5 9 . 2 s t t a w c 5 2 t a g n i t a r r e w o p 0 . 2 1 0 . 9 0 . 6 3 . 4 5 . 2 s t t a w c 0 7 t a g n i t a r r e w o p k 0 0 1 o t r 1 k 6 5 o t r 1 k 0 2 o t r 1 k 5 1 o t r 1 k 0 1 o t r 1 s m h o e c n a r e l o t % 1 t a e g n a r e c n a t s i s e r k 0 0 1 o t r 1 k 6 5 o t r 1 k 0 2 o t 5 r 0 k 5 1 o t 5 r 0 k 0 1 o t 5 r 0 s m h o e c n a r e l o t % 2 k 0 0 1 o t 2 r 0 k 6 5 o t 5 1 r 0 k 0 2 o t 1 r 0 k 5 1 o t 1 r 0 k 0 1 o t 1 r 0 s m h o e c n a r e l o t % 5 c / m p p ) c 0 0 2 o t 5 5 - ( r c t 5 ohms < 10 ohms: 400 10 ohms: 200 applicable to commer cial and appr oved ranges 0 5 7 0 0 5 0 0 2 0 6 1 0 0 1 s t l o v e g a t l o v t n e m e l e g n i t i m i l r e d r o l a i c e p s o t s e u l a v r e h t o . d e r r e f e r p 4 2 e s e u l a v d r a d n a t s 2 2 9 2 4 4 8 5 8 8 t t a w / c e c n a d e p m i l a m r e h t 0 0 2 o t 5 5 - c e g n a r e r u t a r e p m e t t n e i b m a electrical data physical data a subsidiary of tt electr onics plc w elwyn components l d f d construction a high purity ceramic substrate is assembled with interfer ence fit end caps to which ar e welded the termination wir es. the r esistive element is wound on the substrate and welded to the caps; the vitr eous enamel pr otective coating is then applied. t erminations material copper clad steel wir e, nickel plated and solder -coated. str ength the terminations meet the r equir ements of iec 68.2.21. solderability the terminations meet the r equir ements of iec 115-1,? clause 4.17.3.2. length w23? s and w24? s ar e not supplied on tape. minimum lead length is 30 mm. marking the r esistors a r e legend marked with type r efer ence, r esistance v a lue and tolerance. v alues a r e marked in accor dance with iec 62. 0 5 10 15 20 w21 w215 w22 w24 w23 400 300 200 100 0 dissipation ? w atts t emperature rise c t om| ` k ? ? == oul ql mp == nmwnv = ~? == m~ ? = n
vitreous enamelled wirewound resistors w20 series ma ke p ossibl e 09.14 general note tt electronics reserves the right to make changes in product specifcation without notice or liability. all information is subject to tt electronics own data and is considered accurate at time of going to print. ? tt electronics plc www.ttelectronicsresistors.com vitreous enamelled wirewound resistors w20 series www.bitechnologies.com www.irctt.com www.welwyn-tt.com general note tt electronics reserves the right to make changes in product specifcation without notice or liability. all information is subject to tt electronics own data and is considered accurate at time of going to print. ? tt electronics plc 10. 13 v itr eous enamelled w i r ewound resistors w20 series ? w elwyn components limited bedlington, northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com w ebsite: www .welwyn-tt.com w elwyn components cecc 40201-002 actual performance requir ements maximum t ypical load at commer cial rating: 1000 hrs at 25c 5 . 3 5 % r load at cecc rating: 1000 hours at 25c r% 5 5 3.5 dry heat: 1000 hours at 200c r% 521 shelf life: 12 months at r oom temperatur e r% not specified 0.03 0.02 derating see derating curve short term overload r% 1 1.0 0.2 climatic r% 5 0.5 0.2 climatic category r% 55/200/56 long term damp heat r% 5 0.05 0.02 t emperatur e rapid change r% 1 0.5 0.2 resistance to solder heat r% 1 0.25 0.03 v ibration and bump r% 1 0.25 0.05 o r e z o r e z d e i f i c e p s t o n v / v ) y c n e u q e r f f o e d a c e d n i ( e s i o n robustness r% 1 0.4 0.05 m h o g 1 > m h o g 1 > d e i f i c e p s t o n s m h o e c n a t s i s e r n o i t a l u s n i n i m 0 0 5 n i m 0 0 5 d e i f i c e p s t o n s t l o v f o o r p e g a t l o v pulse handling data available by r equest performance data flammability all materials used in the construction of ?w? series r esistors ar e inorganic and inher ently non bur ning. b f 1 f 2 6 6 10 f 1 ? f 2 1.4 mm application notes the termination should not be bent closer than 1.6mm fr om the body , and the r ecommended minimum bend radius is 1.2mm. the terminations ar e solderable to within 4mm fr om the body . when cold, vitr eous enamel has excellent insulation r esistance. in common with all insulants the specific r esistance of the enamel decr eases with incr ease in temperatur e. ther efor e, r esistors operated at near maximum temperatur e cannot be classed as insulated and should not be used in contact with any conducting material. car e must be taken when determining clearance distance between the r esistor body and the printed cir cuit boar d or other components to ensur e these ar e not over heated. resistance is measur ed 6mm fr om body . 25 70 200 315 116 100 54 0 ambient temperature c derating curve % of rated power t ype b w21 632 w215 732 w22 732 packaging for w21 and w215 the standar d method of packaging is taped in ammo packs. for w22 the standar d method of packaging is taped and r eeled. w23? s and w24? s ar e available only as loose packed in boxes. solvent resistance the body pr otection and marking ar e r esistant to all normal industrial cleaning solvents suitable for printed cir cuits. t om| ` k ? ? == oul ql mp == nmwnv = ~? == m~ ? = o solvent resistance the body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits flammability all materials used in the construction of w20 series resistors are inorganic and inherently non-burning.
vitreous enamelled wirewound resistors w20 series ma ke p ossibl e 09.14 general note tt electronics reserves the right to make changes in product specifcation without notice or liability. all information is subject to tt electronics own data and is considered accurate at time of going to print. ? tt electronics plc www.ttelectronicsresistors.com vitreous enamelled wirewound resistors w20 series www.bitechnologies.com www.irctt.com www.welwyn-tt.com general note tt electronics reserves the right to make changes in product specifcation without notice or liability. all information is subject to tt electronics own data and is considered accurate at time of going to print. ? tt electronics plc 10. 13 v i t reous ename l l e d w i rewound r e s i sto r s w 2 0 series ? w elwyn components limited bedlington, northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com w ebsite: www .welwyn-tt.com 86 07.11 w elwyn components w20_c.qxd 28/4/03 10:19 am page 2 or d e r in g p r o ced ure ex a m p l e : w 2 2 a t 3 . 3 k ilo h m s and 5% t o l e rance on a reel o f 700 p i e ce s ? w 2 2 ? 3 k 3 j i t ype va l ue (u s e i ec62 code) t o l e rance (u s e i ec62 code) f 1 % j 5 % g 2 % pa cki ng i a m m o w 2 1 , w 215 1000 / box s t anda r d t ape w 2 2 7 00/ r eel b u l k w 2 3 , w 2 4 50/ box f o r c ecc r e l eas ed p r oduc t s t a t e on o rd e r t h e c ec c num b e r a n d s t y l e . e x a m p l e : w 2 2 -3 k 3 j i c ec c 4 0 2 01- 0 0 2 k b f o r s n p b f i n i s h i n s t ead o f p b -f r e e r epl a c e t h e p a c k i n g s u ffi x w i t h pb . e x a m p l e : w 2 2 - 3 k 3jpb order in g proc edure t h i s p ro d u c t h a s t w o v a l i d p a rt n u m b e rs : e u r o p ea n ( w elw y n ) p a r t nu mb er : w 2 2 - 3k 3j i ( w 2 2 , 3.3 k i l o hm s 5 % , p b - f r ee ) w 2 2 - 3 k 3 j i 1 2 3 4 for c e c c r e lea s e d p r odu c t s t a t e o n o r d e r t h e c e c c n u m b e r and s t y le. e x a m p le : w 2 2 - 3 k 3 j i c e c c 4 020 1 - 002 k b us a ( irc) p a r t nu mb er : w 22 - 33 0 1j l f ( w 2 2 , 3 .3 k i l oh m s 5 % , p b - f r ee ) w 2 2 - 3 3 0 1 j l f 1 2 3 4 1 2 3 4 t y pe va lu e to le ran c e pack in g & te rmi n a tio n fi ni s h w 2 1 e2 4 = 3 / 4 c h a ra c te r s f = 1% i = sta n d a rd p a c k i n g & pb - fre e w 2 1 5 r = o h m s g = 2 % pb = st a n d a rd p a c k i n g & sn p b w 2 2 k = k i l o h m s j = 5 % w 2 1 , w 2 1 5 1000 / b o x w 2 3 w 2 2 700 /re e l w 2 4 w 2 3 , w 2 4 5 0 /b o x 1 2 3 4 t y pe va lu e to le ran c e pack in g & te rmi n a tio n fi ni s h w 2 1 3 d i g i ts + m u l t i p l i e r f = 1% l f = sta nda r d p a c k i n g & p b - fr e e w 2 1 5 r = o h m s f o r v a l u e s < 100 o h m s g = 2 % omit for st a n d a rd p a c k i n g & sn p b w 2 2 j = 5 % w 2 1 , w 2 1 5 1000 / b o x w 2 3 w 2 2 700 /re e l w 2 4 w 2 3 , w 2 4 5 0 /b o x
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