low resistance metal alloy resistor lrma 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 09. 11 resistance range 1 to 100m high temperature operation to 170c low thermal emf version high power version current sensing for power electronics rohs compliant & halogen free l o w r e s i s tanc e met a l a l l o y re s i s to r l r m a seri e s ? r e s i s t a n ce r a nge 1 t o 1 00m ? ? h i gh t e m p e r a t u r e ope r a t i on t o 1 7 0 c ? low t h e r m a l e m f v e r s i on ? h i gh pow e r v e r s i on ? c u rre n t s e n s i ng f o r pow e r e l ect r oni c s ? r o h s c o m p l i a n t & h a l oge n f r ee e l e c t r i c a l d a t a l r ma v ers ion t (sta nd a r d ) p (p ow er ) si ze 2512 2512 p o w e r r a t i n g @ 70 c w r 01 : 2 , > r 0 1 : 1 3 o ve r l oad r a t i ng ( 5 s) w r 01 : 1 0 , > r 0 1 : 5 15 r e si st an ce r ang e m ? 1 t o 50 3 t o 100 s t and a r d va l u e s 1 m ? 1 , 1 . 5 , 2 , 3 , 4 , 5 , 7 , 8 , 9 , 10 , 11 , 12 , 1 5 , 18 , 2 0 , 2 5 , 3 0 , 3 3 , 4 0 , 50 3 , 5 , 1 0 , 1 1 , 15 , 20 , 25 , 3 0 , 40 , 5 0 , 8 0 , 100 r e si st an ce t o l e r an ce % 1 , 5 t cr ( 25 to 125 c) p p m / c > r 01 : 7 5 > r 0 0 1 & r 0 1 : 10 0 , r 00 1 : 27 5 a m b i e n t t e m p e r a t u r e c - 55 t o 170 i n su l a t i o n r e si st an ce m ? >100 e l e m e n t a l l o y c u - ni o r m n - c u c oa t i ng b l a ck l r ma v ers ion m (low t h erma l em f ) n (in verse ) si ze 1206 2512 0815 p o w e r r a t i n g @ 70 c w 1 r 02 : 2 , > r 0 2 : 1 1 2 o ve r l oad r a t i ng ( 5 s) w 5 r 02 : 1 0 , > r 0 2 : 5 5 r e si st an ce r ang e m ? 5 t o 30 5 t o 40 1 t o 30 s t and a r d va l u e s 1 m ? 5 , 1 0 , 1 5 , 2 0 , 2 5 , 30 5 , 1 0 , 2 0 , 3 0 , 40 1 , 6 , 8 , 1 0 , 15 , 20 , 2 5 , 30 r e si st an ce t o l e r an ce % 1 , 5 t cr ( 25 to 125 c) p p m / c > r 01 : 7 5 , r 0 1 : 100 100 a m b i e n t t e m p e r a t u r e - 55 t o 170 c i n su l a t i o n r e si st an ce m ? >100 e l e m e n t a l l o y m n - c u c u - n i c oa t i ng b l a ck g r ee n b l a ck n o t e s : 1 . n on-s t and a r d v a lu e s m a y b e a v a il abl e f o r h i g h v o lu m e r e qui r e m ent s . 2 . r equ i r e s 3 00mm 2 c o ppe r p ad & tr a c e a r ea p h y s i c a l d a t a ( a l l d i m en si o n s i n mm an d n o m i n a l w e i gh t i n g ) si ze l w c t w t 1206 3 . 2 0 .2 1 . 6 0 .2 0 . 5 0 .3 0 . 6 0 .2 18 . 3 0815 2 . 1 0 . 25 3 . 7 5 0 .3 0 . 5 0 .2 0 . 7 0 .2 14 . 1 2512 r 002 2 . 0 0 .2 2512 >r 002 6 . 4 0 .2 3 . 2 0 .2 0 . 9 0 .2 0 . 6 5 0 . 25 57 t o 63 g e n e r al n o t e 08/ 10 w e l w y n co m ponent s r e s e r v e s the r i ght to m a k e c hanges i n p r odu c t s p e c i fi c a ti on wi thout not ice o r l i abi lity a ll i n fo r m a ti on i s s u b j e c t to w e l w y n ?s o w n data and is c ons i der ed a cc u r a te a t t i m e o f goi ng t o p r i n t. ? w e l w y n c o m p o n e n t s l i m i t ed b edlington, no r th u m ber l a n d ne 22 7 aa , uk t e l ephone: + 44 ( 0 ) 1670 822181 ? f a c s i m ile : + 44 ( 0 ) 1670 82946 5 ? e m a i l : i n fo @ w e l w y n - tt.c om ? w ebs i te : www . w e l w y n - tt.c om
low resistance metal alloy resistor lrma 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 09. 11 l o w r e s i s t a n c e m e t a l a l l o y r e s i s t o r l r m a s e r i e s t e m p e r a t u r e d e r a t i n g 0 % 20% 40% 60% 80% 100% - 3 0 2 0 7 0 120 170 a m b i e n t t e m p e r a t u r e ( c ) pr o p o r t i o n o f p r typ i cal temperat ure r i se 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 0 % 2 0 % 4 0 % 60% 80% 1 0 0 % p r opo r t i o n o f p r t e m p e r a t u r e r i s e ( c ) j o i n t h o t s pot c o n s t r u c t i o n m a r k i n g t h e co m ponen t s a re m a rke d w i t h o h mi c v a l u e , e . g . ?r 0 0 2 ? = 2 m , ?r010 ? = 1 0 m . s o l v e n t r e s i s t a n c e t h e co m ponen t i s re s i s t a n t t o a l l n o r m a l i ndu s t ri a l cl e a n i n g s o l v e n t s s u i t a b l e f o r p r i n t e d c i rcu i t s . p e r f o r m a n c e d a t a ma x i m u m (% ) t y p i c a l (% ) load a t r a t e d p o w e r ( c y clic l oad , 1000 hou r s a t 7 0 ? c) ? r 1 0 . 3 s h o r t t e r m o ve r l o a d ( 5 x r a t e d p o w e r fo r 5 s ) ? r 0 . 5 0 . 1 5 h u m i d i t y ( 1000 hou r s , 8 5 c, 8 5 % rh) ? r 0 . 5 0 . 1 5 t e m p e r a t u r e cy cl e ( - 4 0 to +125 c, 1 0 0 0 c y c l e s , 1 5 m i n u te d we l l ) ? r 0 . 5 0 . 1 5 r e si st a n ce t o so l d e r h e a t ( 260 c 5 c fo r 2 0 s 1 s ) ? r 0 . 5 0 . 3 s o l d e r a b i l i t y ( 245 c 5 c fo r 2 s 0 .5 s ) >95 % co ve r a g e d r y h e a t ( 1000 hou r s a t 170 ? c) ? r 0 . 5 0 . 3 l o w t e m p e r a t u r e s t o r a g e ( 1000 hou r s a t - 5 5 c) ? r 0 . 5 0 . 1 5 s u b st r a t e b e n d i n g ( boa r d 1 .6 m m , fu l c r u m s p a c i n g 9 0 m m , d e fl e c t i o n 2 m m ) ? r 0 . 5 0 . 3 i n su l a t i o n r e si st a n ce ( 1 m i n u te @ 1 0 0 v d c ) >100 m t h e r m a l p e r f o r m a n c e & m o u n t i n g r e fere n c e pa d d i m e n s i o n s (m m ) si ze a b l 1206 1 . 8 1 . 9 1 . 4 0815 7 . 9 1 . 5 0 . 9 2512 r002 4 . 0 3 . 1 1 . 3 2512 >r002 4 . 0 2 . 1 4 . 1 g e ne r a l not e 0 8 / 1 0 w e l w y n co m ponen t s r e s e r v e s th e r i g h t to m a k e c hange s i n p r o d u c t s p e c i fi c a ti o n wi thou t n o t i c e o r l i a b i l i ty a l l i n fo r m a ti o n i s s u b j e c t to w e l w y n ? s o w n d a ta and i s c o n s i d e r e d a c c u r a te a t t i m e o f g o i n g t o p r i n t. ? we lw y n c om p one nt s lim ited b e d l i n g to n , no r th u m b e r l and ne 2 2 7 a a , u k t e l ephone : + 4 4 ( 0 ) 1670 822181 ? f a c s i m i l e : + 4 4 ( 0 ) 1670 8294 6 5 ? e m a i l : i n fo @ w e l w y n - tt.c o m ? w e b s i te : www . w e l w y n - tt.c o m c o p p e r e l e c tr o d e w i t h n i cke l t h e n ti n p l a t i n g c o a ti n g (u l 9 4 -v0 ) l o w t c r res i s ta n c e a l l o y p l a te t h e t e m p e r a t u r e r i se sh o w n i s h i g h l y d e p e n d e n t o n m o u n t i n g co n d i t i o n s. r e f e r e n ce cond i t i o n s a ssu m e 2 0 copp e r w i t h t h e r m a l vi a s t o m u l t i p l e l a ye r s . t h e se l f - h e a t i n g i n t h e cu r r e n t t r a cks shou l d b e ke p t n e g l i g i b l e , o r a l l o w e d f o r b y t e m p e r a t u r e d e r a t i n g . sense current l b a
low resistance metal alloy resistor lrma 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 09. 11 low r e s i s t a n c e m e t a l a llo y r e s i s t or l r m a s e r i e s p aper t ap e bo tt om t ape p ackag i n g si ze t a p e a b w f e p 1 p 2 p 0 d 0 t a b c w r t r 1206 p ap e r 2 .0 0 . 15 3 . 6 0 .2 8 . 0 0 .2 3 . 5 0 . 05 1 . 7 5 0 .1 4 . 0 0 .1 2 . 0 0 . 05 4 . 0 0 .1 1 . 5 +0 .1 / -0 0 . 8 4 0 .1 178 0 .2 60 1 13 1 9 1 11 . 5 1 0815 e m bo ss 2 . 6 0 .2 4 . 5 0 .2 12 0 .2 5 . 5 0 .1 1 . 7 5 0 .1 4 . 0 +- 0 .1 2 . 0 0 .2 4 . 0 0 .1 1 . 5 5 0 . 05 1 . 1 0 .1 178 0 .2 60 1 13 1 13 1 15 . 4 2 2512 e m bo ss 3 . 6 0 .2 6 . 9 0 .2 12 0 .2 5 . 5 0 . 05 1 . 7 5 0 .1 4 . 0 0 .1 2 . 0 0 . 05 4 . 0 0 . 05 1 . 5 +0 .1 / -0 0 . 8 5 0 . 15 178 0 .2 60 1 13 1 13 1 15 . 4 2 s t o r a g e c o n di t i o n s: 5 c to 35 c and 40% to 75%rh sh e l f li f e: 2 y ea rs f ro m m an u f a ct u re p r o cessi n g lr ma s e ri e s re s i s t o rs a re s u i t ab l e f o r bo t h wa v e and i r re f l o w s o l de ri ng . t he re co mm ended re f l o w p ro f i l e f o r p b- f r ee sac305 al l o y (sn 96 . 5 % , ag 3 % , cu 0 . 5% ) s o l de ring i s a s f o l l o w s : p re -h ea t: 60 s to 120 s a t 150 c to 180 c so l d er i n g: 20 s to 40 s a t 230 c p eak: 5 s a t 250 c to 255 c o rderi ng p roc edure ex a m p l e : lr ma l o w t he r m al em f v e rs i on i n 2512 s i ze and a t 10 mi lli o h m s and 1% to l e r an ce pa ck ed i n t ape . l r m a m 2 5 1 2 ? r 0 1 f t 4 t y pe ve rs i on t p m n si ze va l ue (u s e iec62 c ode ) t o l e r an ce (u s e iec62 c ode ) f 1 % j 5 % pa cki ng t 5 1206 5000 / r ee l t 4 t ap e 0815 , 2512 4000 / r ee l s t and a r d g e ne r a l not e 08/ 10 w e l w y n co m ponent s r e s e r v e s the r i ght to m a k e c hanges i n p r odu c t s p e c i fi c a ti on wi thout not ic e o r l i abi li ty a ll i n fo r m a ti on i s s u b j e c t to w e l w y n ?s o w n data and is c ons i der ed a cc u r a te a t t i m e o f goi ng t o p r i n t. ? we l wy n c om p one nt s lim ited b ed li ngton, no r th u m ber l and ne 22 7 aa , u k t e l ephone: + 44 ( 0 ) 1670 822181 ? f a c s i m il e : + 44 ( 0 ) 1670 82946 5 ? e m a i l : i n fo @ w e l w y n - tt.c om ? w ebs i te : www . w e l w y n - tt.c om c b a tr w r
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