radial ceramic case resistors wirewound / metal oxide sqm / cvf / cvw series 2 to 10 wats resistance 0r1 to 200k high overload capability flameproof case small pcb footprint rohs compliant a subsidiary of tt electr onics plc 05 . 08 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 radial ceramic case resistors wirewound / metal oxide 2 to 10 watts resistance 0r1 to 200k high overload capability flameproof case small pcb footprint rohs compliant sqm series el ect r i c al d ata s q m2 / cv-2 / cv-2 s q m3 / cv-3 s q m5 / cv-5 s q m7 / cv-7 s q m1 0 / cv-10 p o w e r r a t i n g a t 7 0 c w a t t s 2 3 5 7 1 0 0 r 1 - 2 7 r 0 r 1 - 3 9 r 0 r 1 - 4 7 r 0 r 1 - 680 r 0 r 1 - 910 r 3 0 r ? 3 3 k 4 3 r ? 5 6 k 5 1 r ? 1 0 0 k 750 r - 2 0 0 k 1 k 0 - 200 k l i mit i n g e l e me n t v o l t a g e v o l t s d c o r a c r m s 1 5 0 3 0 0 3 5 0 5 0 0 7 5 0 t h e r ma l i mp e d a n c e c / w a t t 5 0 4 5 3 0 2 8 2 3 i s o l a t i o n v o l t a g e v o l t s 1 0 0 0 t c r p p m/ c < 2 0 r : 400 , 2 0 r : 350 r e s i s t a n c e t o l e r a n c e % 5 10 s t a n d a r d v a l u e s e 2 4 a mb i e n t t e mp e r a t u r e r a n g e c - 5 5 t o + 1 5 5 o c ph y si cal d ata (a l l d i m e n s i o n s i n m m , w e i g h t s i n g ) t y p e l 1 . 0 w 1 . 0 d 1 . 0 p 1 . 0 d 0 . 0 5 we i g h t n o m. s q m2 / cv-2 2 0 1 1 . 5 7 . 5 5 0 . 7 4 . 3 s q m3 2 5 1 2 . 5 8 . 5 5 0 . 7 5 . 6 s q m5 2 5 1 2 . 5 9 5 0 . 8 6 . 3 s q m7 3 8 1 2 . 5 9 5 0 . 8 1 0 . 7 s q m1 0 5 0 1 2 . 5 9 5 0 . 8 1 3 . 4 con s truction a h i g h p urit y c eram i c r od , wi th f orc e f i t en d c ap s on t o w hi c h i s w ou nd a wi r e el e m en t: or a de p os i te d m eta l ox i d e f i l m ( de pe nd i ng on v a l ue ) . t he el em en t i s f i tte d i nto a c era m i c c as e wi th f i r ep r oo f i ns u l at i on c em en t. b e f 1 . 0 4.5 3.0 3.0 4.5 4.0 4.0 5.0 3.5 3.5 5.0 2.75 5.0 4.25 2.75 5.0 1 . 0 1 . 0 5 1 d l p d b e f w m a r k ed s i d e / cv-3 / cv-5 / cv-7 / cv-10 resistance range ? wirewound (cvw) ohms ohms resistance range ? oxide (cvf) a subsidiary of tt electr onics plc 05 . 08 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 radial ceramic case resistors wirewound / metal oxide 2 to 10 watts resistance 0r1 to 200k high overload capability flameproof case small pcb footprint rohs compliant sqm series el ect r i c al d ata s q m2 / cv-2 / cv-2 s q m3 / cv-3 s q m5 / cv-5 s q m7 / cv-7 s q m1 0 / cv-10 p o w e r r a t i n g a t 7 0 c w a t t s 2 3 5 7 1 0 0 r 1 - 2 7 r 0 r 1 - 3 9 r 0 r 1 - 4 7 r 0 r 1 - 680 r 0 r 1 - 910 r 3 0 r ? 3 3 k 4 3 r ? 5 6 k 5 1 r ? 1 0 0 k 750 r - 2 0 0 k 1 k 0 - 200 k l i mit i n g e l e me n t v o l t a g e v o l t s d c o r a c r m s 1 5 0 3 0 0 3 5 0 5 0 0 7 5 0 t h e r ma l i mp e d a n c e c / w a t t 5 0 4 5 3 0 2 8 2 3 i s o l a t i o n v o l t a g e v o l t s 1 0 0 0 t c r p p m/ c < 2 0 r : 400 , 2 0 r : 350 r e s i s t a n c e t o l e r a n c e % 5 10 s t a n d a r d v a l u e s e 2 4 a mb i e n t t e mp e r a t u r e r a n g e c - 5 5 t o + 1 5 5 o c ph y si cal d ata (a l l d i m e n s i o n s i n m m , w e i g h t s i n g ) t y p e l 1 . 0 w 1 . 0 d 1 . 0 p 1 . 0 d 0 . 0 5 we i g h t n o m. s q m2 / cv-2 2 0 1 1 . 5 7 . 5 5 0 . 7 4 . 3 s q m3 2 5 1 2 . 5 8 . 5 5 0 . 7 5 . 6 s q m5 2 5 1 2 . 5 9 5 0 . 8 6 . 3 s q m7 3 8 1 2 . 5 9 5 0 . 8 1 0 . 7 s q m1 0 5 0 1 2 . 5 9 5 0 . 8 1 3 . 4 con s truction a h i g h p urit y c eram i c r od , wi th f orc e f i t en d c ap s on t o w hi c h i s w ou nd a wi r e el e m en t: or a de p os i te d m eta l ox i d e f i l m ( de pe nd i ng on v a l ue ) . t he el em en t i s f i tte d i nto a c era m i c c as e wi th f i r ep r oo f i ns u l at i on c em en t. b e f 1 . 0 4.5 3.0 3.0 4.5 4.0 4.0 5.0 3.5 3.5 5.0 2.75 5.0 4.25 2.75 5.0 1 . 0 1 . 0 5 1 d l p d b e f w m a r k ed s i d e / cv-3 / cv-5 / cv-7 / cv-10 resistance range ? wirewound (cvw) ohms ohms resistance range ? oxide (cvf) ma ke p ossibl e resistors 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 all parts are pb-free and comply with eu directve 2011/65/eu (rohs2)
radial ceramic case resistors wirewound / metal oxide sqm / cvf / cvw series radial ceramic case resistors wirewound / metal oxide 05 . 08 ? 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 sqm series t er min atio n details: m ateri al t he 10 0% s n f i n i s h c op pe r l ea d wi r es are i nte r na l l y wel d ed t o t h e res i s ta nc e e l e m en t e nd c ap s . s o lder abilit y t he te r m i na ti on s m ee t th e r e qu i r em en ts of ie c 11 5 - 1 cl au s e 4. 1 7.3 . 2 s t r eng t h t he te r m i na ti on s m ee t th e r eq u i r em en ts of ie c 86 . 2.2 1 m ar king : t y p e ref erenc e, r es i s tan c e v a l ue an d t o l era n c e a r e l eg e nd m ar k ed on to the u pp er s urf ac e. f lammab ilit y : t he r es i s t or wil l n ot b urn u nd er an y c on di t i on of ap p l i e d t em pe r atu r e o r o v erl oa d . s o lv ent r es i stan c e: t he b od y prote c t i o n a n d m ar k i ng are r es i s ta nt to al l n orm al i nd us tr i a l s o l v en ts s u i tab l e f or pr i nt ed c i r c ui ts . per fo r man ce d ata ma x i mu m l o a d a t r a t e d p o w e r ( 1000h r s a t 7 0 c ) r d e r a t i n g f r o m r a t e d p o w e r a t 7 0 c s e e g r a p h r 5 % + 0 . 0 5 ? d a mp h e a t s t ead y s t a t e ( 5 6 d a y s , 4 0 c , 90 % rh ) r 5 % + 0 . 0 5 ? t e mp e r a t u r e r a p i d c han g e ( 5 c y c l e s - 5 5 o c t o + 1 5 5 o c ) r 2 % + 0 . 0 5 ? r e s i s t a n c e t o s o l d e r hea t r 1 % + 0 . 0 5 ? v o l t age p r o o f ( 1 k v f o r 6 0 s ) n o e v i d e n c e o f f l a s h o v e r , me c han i c a l d a ma g e , a r c i n g o r i n s u l a t i o n b r e a k d o w n s o l d e r a b ili t y min . 9 5 % c o v e r a g e dera ting c urv e orde ring p ro c e dure e x am pl e: s q m 3 a t 1. 2 k i l o hm s an d 5 % tol eranc e bu l k pa c k ed i n a bo x of 30 00 pi ec es ? s q m 3 ? 1 k 2 j b 3 t y pe v al ue ( us e ie c62 c o de ) t ol eranc e (us e i e c6 2 c od e ) j 5 % p ac k i ng b3 bu l k sq m 2 , 3 3000 / b o x sta nda r d b2 sq m 5 2000 / b o x b1 sq m 7 , 1 0 1000 / b o x 0 % 100 % t ( c ) 7 0 1 5 5 2 7 5 6 0 % - 5 5 p / p r <100k: 5% 100k: 10% short term overload (lesser of 6.25 x pr or 2.5 x lev for 5s) ma ke p ossibl e 09.14 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
radial ceramic case resistors wirewound / metal oxide sqm / cvf / cvw series ordering procedure this product has two valid part numbers: european (welwyn) part number : sqm 3 - 1 k 2jb 3 ( sqm 3 , 1.2 kil ohms 5 % , pb - free) s q m 3 - 1 k 2 j b 3 1 2 3 4 usa (irc) part number: cvf 31201jlf ( cvf 3, 1.2 kilohms 5 % , pb - free ) c v f 3 1 2 0 1 j l f 1 2 3 4 5 1 2 3 4 type value tolerance packing & termination finish sqm2, sqm3, sqm5, sqm7 SQM10, e24 = 3 /4 characters r = ohms k = kilohms j = 5 % pb - free only k = 10 % b3 sqm2, sqm3 3000/box b2 sqm5 2000/box b1 sqm7, SQM10 1000/box 1 2 3 4 5 type size value tolerance termination finish packing cvf, cvw 2 3 digits + multiplier r = ohms for values <100 ohms j = 5 % lf = pb - free 2, 3 3000/box 3 k = 10 % 5 2000/box 5 7, 10 1000/box 7 10 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
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