surface mount sense resistors oars, oars-xp, oarsz 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 04.14 flexible leads for thermal expansion open-air design reduces pcb heating values down to 1milliohm element tcr 20ppm/oc zero-ohm 65a jumper version rohs compliant su rf a c e m o u n t se n s e r e s i s t o r s a o r s , o a r s - x p , o a r s z s e r i e s f l e x i b l e l e a d s f o r t h e r m a l e x p a n s i o n o p e n - a i r d e s i g n r e d u c e s p c b h e a t i n g v a l u e s d o w n t o 1 m e l e m e n t t c r 2 0 p p m / o c z e r o - o h m 6 5 a j u m p e r v e r s i o n r o h s c o m p l i a n t e l e c t r i c a l d a t a o a r s 1/3 o a r s - x p po w e r ra t i n g a t 2 5 o c w a t t s 2 4 po w e r ra t i n g a t 85o c w a t t s 1 2 r e s i s t a n ce rang e o h m s r00 2 t o r05 0 r00 1 t o r02 5 r e s i s t a n ce t o l e ra n ce % r00 2 : 5 , > r00 2 : 1 , 5 st and a rd va l u e s (en q u i r e f o r u n l i s t e d v a l u e s ) mi l l i o h m s 2 , 3 , 4 , 5 , 1 0 , 1 5 , 2 0 , 2 2 , 2 5 , 3 0 , 4 0 , 5 0 1 , 2 , 2 . 5 , 5 , 7 . 5 , 1 0 , 2 0 , 2 5 i n d u ct a n ce n h < 1 0 a m b i e n t t e m p e ra t u re rang e c -5 5 t o + 1 6 0 o a r s - 1 z c o m m e n t s c u rre n t ra t i n g a t 2 5 o c a m p s 6 5 c u rre n t ra t i n g a t 8 5 o c a m p s 4 6 a m b i e n t t e m p e ra t u re rang e c -5 5 t o + 1 6 0 z e ro -o h m j u m p e r p h y s i c a l d a t a d i m e n s i o n s (mm) a n d re co mm ende d s o l d e r pad s t yp e l h t d w a n o m . b n o m . c n o m . d n o m . o a r s1/3 > r00 3 , o a r s-1 z 3 . 0 5 0 . 7 6 o a r s1/3 - r00 3 1 1 . 1 8 0 . 3 8 4 . 8 3 0 . 7 6 3 . 1 8 0 . 3 8 4 . 0 7 o a r s1/3 - r00 2 1 1 . 5 6 0 . 3 8 3 . 5 1 0 . 7 6 4 . 7 0 . 7 6 3 . 5 6 0 . 3 8 4 . 4 5 9 . 3 7 3 . 0 7 o a r s-xp 1 0 . 7 t o 1 2 . 0 * 2 . 2 8 t o 4 . 5 7 * 2 . 3 6 0 . 2 5 4 . 8 3 0 . 7 6 6 . 3 5 0 . 3 8 7 . 2 4 9 . 5 8 3 . 1 8 3 . 2 3 * d e p e n d e n t o n o h m i c v a l u e a b d c c 07.11 su rf a c e m o u n t se n s e r e s i s t o r s a o r s , o a r s - x p , o a r s z s e r i e s f l e x i b l e l e a d s f o r t h e r m a l e x p a n s i o n o p e n - a i r d e s i g n r e d u c e s p c b h e a t i n g v a l u e s d o w n t o 1 m e l e m e n t t c r 2 0 p p m / o c z e r o - o h m 6 5 a j u m p e r v e r s i o n r o h s c o m p l i a n t e l e c t r i c a l d a t a o a r s 1/3 o a r s - x p po w e r ra t i n g a t 2 5 o c w a t t s 2 4 po w e r ra t i n g a t 85o c w a t t s 1 2 r e s i s t a n ce rang e o h m s r00 2 t o r05 0 r00 1 t o r02 5 r e s i s t a n ce t o l e ra n ce % r00 2 : 5 , > r00 2 : 1 , 5 st and a rd va l u e s (en q u i r e f o r u n l i s t e d v a l u e s ) mi l l i o h m s 2 , 3 , 4 , 5 , 1 0 , 1 5 , 2 0 , 2 2 , 2 5 , 3 0 , 4 0 , 5 0 1 , 2 , 2 . 5 , 5 , 7 . 5 , 1 0 , 2 0 , 2 5 i n d u ct a n ce n h < 1 0 a m b i e n t t e m p e ra t u re rang e c -5 5 t o + 1 6 0 o a r s - 1 z c o m m e n t s c u rre n t ra t i n g a t 2 5 o c a m p s 6 5 c u rre n t ra t i n g a t 8 5 o c a m p s 4 6 a m b i e n t t e m p e ra t u re rang e c -5 5 t o + 1 6 0 z e ro -o h m j u m p e r p h y s i c a l d a t a d i m e n s i o n s (mm) a n d re co mm ende d s o l d e r pad s t yp e l h t d w a n o m . b n o m . c n o m . d n o m . o a r s1/3 > r00 3 , o a r s-1 z 3 . 0 5 0 . 7 6 o a r s1/3 - r00 3 1 1 . 1 8 0 . 3 8 4 . 8 3 0 . 7 6 3 . 1 8 0 . 3 8 4 . 0 7 o a r s1/3 - r00 2 1 1 . 5 6 0 . 3 8 3 . 5 1 0 . 7 6 4 . 7 0 . 7 6 3 . 5 6 0 . 3 8 4 . 4 5 9 . 3 7 3 . 0 7 o a r s-xp 1 0 . 7 t o 1 2 . 0 * 2 . 2 8 t o 4 . 5 7 * 2 . 3 6 0 . 2 5 4 . 8 3 0 . 7 6 6 . 3 5 0 . 3 8 7 . 2 4 9 . 5 8 3 . 1 8 3 . 2 3 * d e p e n d e n t o n o h m i c v a l u e a b d c c 07.11 electrical data oars1 oars3 oars - xp power rating at 70 c ambient, or 140 c terminal temperature watts 2 3 5 resistance range ohms r002 to r050 r002 to r015 r001 to r025 resistance tolerance % r002: 5, > r002: 1, 5 standard values (enquire for unlisted values) milliohms 2, 3, 4, 5, 10, 15, 20, 22, 25, 30, 40, 50 2, 3, 4 , 5, 10, 15 1, 2, 2.5, 5, 7.5, 10, 20, 25 inductance nh <10 ambient temperature range c - 55 to +160 oars - 1z comments current rating at 25 c ambient amps 65 zero - ohm jumper max residual resistance milliohms 0. 3 ambient temperature range c - 55 to +160 temperature derating oarsz oars1/3/xp note: for oars1/3/xp this relates to power rating, for oarsz it relates to current rating.
surface mount sense resistors oars, oars-xp, oarsz 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 04.14 s u r f a ce m o u n t s e n s e r e si st o r s o a r s , o a r s - x p , o a r s z s e r i e s p e r f o r m a n c e d a t a ( a e c - q 2 0 0 ) o a r s1/3 < r00 4 r00 4 to r01 5 > r01 5 o a r s-xp < r00 2 r00 2 to r00 7 > r00 7 t c r (-5 5 t o 125o c ) p p m / o c 2 4 0 4 0 4 0 t h e r m a l sh o ck ? r % 0 . 7 5 0 . 7 5 0 . 7 5 h i g h t e m p . e x p o s u re (125o c ) ? r % 1 . 7 5 0 . 5 1 t e m p . c y cl i n g (-4 0 t o 125o c ) ? r % 1 1 0 . 7 5 o p e ra t i o n a l l i f e ? r % 2 1 1 bi a s e d h u mi d i t y ? r % 0 . 7 5 0 . 5 0 . 5 me ch a n i ca l sh o ck ? r % 1 . 5 1 1 vi b ra t i o n ? r % 1 1 1 t e r mi n a l st re n g t h me e t s ji s-c -642 9 so l v e n t r e s i s t a n ce me e t s mi l -st d -0 0 2 me t h o d 2 1 5 so l d e ra b i l i t y me e t s j-st d -0 0 2 me t h o d b n o t e : t e m p e r a t u r e ri s e d a t a a r e g i v e n h e r e f o r t y p i c a l m o u n t i n g c o n d i t i o n s . ac t u a l f i g u r e s d e p e n d o n pc b c o p p e r w e i g h t , m o u n t i n g p a d s i z e , t r a c k w i d t h a n d s u b s t r a t e t y p e . al s o , t h e o p e n a i r f o r m a t r e s p o n d s b e t t e r t o f o rc e d a i r c o o l i n g t h a n c h i p f o r m a t r e s i s t o rs . f o r v a l u e s b e l o w 5 m i l l i o h m s a l l o w a n c e s h o u l d b e m a d e f o r h e a t g e n e r a t e d i n t h e c o p p e r t r a c k s t h e m s e l v e s . ap p l i c a t i o n -s p e c i f i c g u i d a n c e i s a v a i l a b l e o n r e q u e s t . t e m p e r a t u r e d e r a t i n g 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 0 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 1 7 5 a m b i e n t t e m p e r a t u r e ( d e g c ) % o f r a t e d p o w e r p u l s e e n e r g y r a t i n g 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 1 0 1 0 0 v a l u e ( m i l l i o h m s ) e n e r g y ( j ) o a r s 1/3 o a r s - x p n o t e : f o r o ar s-1 z t h e a b o v e d e r a t i n g g r a p h m a y b e a p p l i e d t o t h e s q u a r e o f t h e c u rr e n t r a t i n g . n o t e : t h i s g r a p h r e l a t e s t o s i n g l e p u l s e s o f s h o rt d u r a t i o n ( 1 0 0 m s ). h i g h e r e n e r g y l i m i t s a p p l y f o r l o n g e r p u l s e s a n d o v e rl o a d s h o t s p o t t e m p e r a t u r e r i s e 7 .6 m m x 7 .6 m m p a d s , 2 o z c o p p e r o n f r 4 , s t ill a ir 0 5 0 1 0 0 1 5 0 2 0 0 2 5 0 3 0 0 2 5 % 5 0 % 7 5 % 1 0 0 % p r o p o r t i o n o f r a t e d po w e r t e m p e r a t u r e r i s e ( k ) 5 0 / 2 5 3 0 / 1 5 1 0 / 5 5 / - v a lu e in m illio h m s o ar s 1/3 / o a r s - x p j o i n t t e m p e r a t u r e r i s e 7 . 6 m m x 7 . 6 m m p a d s , 2 o z c o p p e r o n f r 4 , s t i l l a i r 0 2 0 4 0 6 0 8 0 1 0 0 2 5 % 5 0 % 7 5 % 1 0 0 % p r o p o r t i o n o f r a t e d p o we r t e m p e r a tu r e r i s e ( k ) 5 / - 1 0 / 5 3 0 / 1 5 5 0 / 2 5 v a l u e i n m ill i o h m s o a r s 1/3 / o a r s - x p 07.11 electrical data oars1 oars3 oars - xp power rating at 70 c ambient, or 140 c terminal temperature watts 2 3 5 resistance range ohms r002 to r050 r002 to r015 r001 to r025 resistance tolerance % r002: 5, > r002: 1, 5 standard values (enquire for unlisted values) milliohms 2, 3, 4, 5, 10, 15, 20, 22, 25, 30, 40, 50 2, 3, 4 , 5, 10, 15 1, 2, 2.5, 5, 7.5, 10, 20, 25 inductance nh <10 ambient temperature range c - 55 to +160 oars - 1z comments current rating at 25 c ambient amps 65 zero - ohm jumper max residual resistance milliohms 0. 3 ambient temperature range c - 55 to +160 temperature derating oarsz oars1/3/xp note: for oars1/3/xp this relates to power rating, for oarsz it relates to current rating.
surface mount sense resistors oars, oars-xp, oarsz 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 04.14 t h e rma l p e r f o rma n c e e xam p l e s t hese t h e rma l i m a g e s w e r e t a k en unde r a m b i ent condi t i ons o f st ill a i r a t 2 5 c w i t h t he co m ponen t s m ount e d on h o r i z ont a l st andar d t e st boar d s a s d e f i ned bel o w . j e de c s t and a r d c i r c u i t b o a r d : 2 ? ( 50.8 m m ) s quar e f r4 2 out e r p o we r p l a n e s , 2 o u n c e ( 70 ) cu 1 ? ( 25.4 m m ) s quar e e x pos e d 2 i n ner s i gna l p l a n e s , 1 oun c e ( 35 ) cu ( cont i nuous p l anes) i n co n t r a s t t o t h e f l a t ch i p f o rma t , t h e o a r s f o r m a t k eeps t he h o t sp o t t h e rma lly d i st ant f r o m t h e so l der j o i n t s and r edu ce s undesi r abl e hea t deliv e r y i n t o t h e p c b . f u r t h e r t herma l i m a g e s f o r o t h e r ohm i c v a l ues and pow e r d i ssi pat i ons a r e a v a ilabl e on r e q uest . k e l v i n ( 4 t e r m i n a l ) m o unt i n g f o r h i g h p r e ci si on applica t i ons a k e l v i n ( 4 t e r m i nal ) m oun t i ng m e t h od i s r e co m m ended . a n e x a m p l e t o illu st r a t e t h e desi g n p r i n ci p l e i s show n . h i g h cu rre n t connect i ons a r e m ade t o t h e t w o pai r s o f l a r g e r pads , w h ilst th e v o l t a g e sense connect i ons a r e m ade t o t h e t w o sm a lle r cent r a l pad s. oa rs 1 - r 0 0 5 at 2 w oa rs x p - r0 0 2 5 a t 5 w
surface mount sense resistors oars, oars-xp, oarsz 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 04.14 s u r f a ce m o u n t s e n s e r e si st o r s o a r s , o a r s - x p , o a r s z s e r i e s f l amm construction a b i l i ty t h e re s i s t o r w i l l n o t b u rn o r e mi t i n cand e s ce n t p a rt i c l e s und e r a n y co n d i t i o n o f app l i e d t e m p e ra t u re o r o v e r l o a d . ma r k i n g t h e p a rt s a re l egen d m a rke d w i t h copper terminations are welded to resistance alloy strip which is then formed. value adjustment is achieved by control of width, without the need for subsequent abrasion or notch trimming. pb-free termination finish is 96% sn / 4% ag alloy. o h mi c v a l u e a n d t o l e ra n ce co d e . p ack a g i n g d a t a d i m e n s i o n s (mm) t yp e a b c d e f g o a r s1/3 , o a r s-1 z 4 . 3 2 0 . 0 8 1 1 . 7 0 . 0 8 8 0 . 1 o a r s-xp-r00 1 1 1 . 9 4 0 . 1 o a r s-xp > r00 1 7 . 2 1 0 . 1 1 1 . 5 6 0 . 1 2 4 0 . 3 1 1 . 5 0 . 1 1 . 7 5 0 . 1 1 2 0 . 1 4 0 . 1 07.11
surface mount sense resistors oars, oars-xp, oarsz 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 04.14 ordering procedure o r d e r ing pr o cedur e t h i s p ro d u c t h a s t w o v a lid p a rt num bers : e u r opean ( w e lw y n ) p a r t nu m b e rs : o a r s 1 - r0 1ji ( o a rs 1 , 1 0 m illiohm s 5 % , p b - f r ee) o a r s - 1 z ( o a r s - 1 z , p b - f r ee) o a r s 1 - r 0 1 j i 1 2 3 4 o a r s - 1 z 1 us a ( irc) p a r t nu m b e r s : o a r s 1 r 010 j l f ( o a r s 1 , 1 0 m illi ohm s 5% , p b - f r ee) o a r s - 1 zlf ( o a r s - 1 z , p b - f r ee) o a r s 1 r 0 1 0 j l f 1 2 3 4 o a r s - 1 z l f 1 2 1 2 3 4 t y p e va lue tole r a n c e t e r m ina ti on & pa c k ing o ar s1 3 -5 c hara c t e r s see el e c t ri c a l d a t a r = ohm s f = 1 % i = pb - f re e , t ape & r e e l o ar s3 j = 5 % o ar s1 , o ar s3 1900/ r eel o ar s - x p o ar s - x p 1200/ r eel 1 t y p e o ar s - 1 z n o v a l ue o r t o l e ra n c e a ppl i e s . t e rm i nat i on i s pb - f ree. p a c k i n g i s t ape & r e e l , 1 9 00/ re e l . 1 2 3 4 t y p e va lue tole r a n c e t e r m ina ti on & pa c k ing o ar s1 4 / 5 c hara c t e r s see el e c t ri c a l d a t a r = ohm s f = 1 % l f = pb - f r e e o ar s3 j = 5 % o ar s1 , o ar s3 1900/ r eel o ar s - x p o ar s - x p 1200/ r eel 1 2 t y p e t e r m ina ti on & pa c k ing o ar s - 1 z n o v a l ue o r t o l e ra n c e a ppl i e s . l f = pb - f r ee, t ape & r eel , 1 9 00/ re e l .
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