melf resistors wrm 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 09.13 high reliability predictable pulse handling capability tolerances down to 0.1% tcr down to 5 ppm/c dimensions (mm) and weight (g) t ype l d d 1 k w eight max max max min wrm 0102 2.2 1.35 1.3 0.3 0.01 wrm 0204 3.7 1.55 1.55 0.5 0.02 wrm 0207 6.1 2.4 2.4 0.5 0.08 melf resistors wrm series ? high r eliability ? pr edictable pulse handling capability ? t olerances down to 0.1% ? tcr down to 5 ppm/c 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 wrm 0102 wrm 0204 wrm 0207 4 . 0 5 2 . 0 125 . 0 s t t a w c 0 7 t a g n i t a r r e w o p m 10 ? 2 2 r m 5 1 ? r22 4r7 - 110k s m h o e g n a r e c n a t s i s e r 0 5 2 0 0 2 0 5 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 0, 100 5 , 5 2 0, 100 5 , 5 2 , 5 1 , 5 0 5 c / m p p r c t 5 , 2 , 0 . 1 , 5 . 0 , 5 2 . 0 1 , 1 . 0 % e c n a r e l o t e c n a t s i s e r standar d values e24 & e96 0 4 1 0 0 2 0 5 2 w / k e c n a d e p m i l a m r e h t 5 2 1 + 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 0 1 > s m h o e c n a t s i s e r n o i t a l u s n i 10 electrical data physical data 01. 11 a subsidiary of tt electr onics plc w el wyn components l k l 1 d d 1 construction a metal film is deposited onto a high dissipation ceramic former to which tin plated teminating caps ar e fitted. the r esistor is adjusted to value by a helical cut in the film and the body is pr otected by a lacquer coating. marking resistance values are colour coded with four bands, three indicating value and one indicating the multiplier. (note this describes standard marking, but certain values may still be supplied with the addition of a tolerance band following the multiplier.) t erminations material plated steel cap. solderability the pur e tin finish pr oduces ageing fr ee contacts on which low melting solders can be used. dipped ar ea shall be cover ed with a smooth and bright solder coating after 3 seconds immersion at 215c. solvent resistance the body pr otection and marking ar e r esistant to all normal industrial cleaning solvents suitable for printed cir cuit boar ds. , 0 1 , 5 1
melf resistors wrm 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 09.13 melf resistors wrm 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 01.11 w el wyn components * resistors to be mounted on a pc-boar d accor ding to iec 115-1, clause 4.27.1 performance data t est results ? r/r 0204 & 0207: 10r - <75r & >100k - 332k 0102: 4r7 - 110k, 0204 & 0207: r22 - <10r & >332k - 10m 0204 & 0207: 75r - 100k short time overload* 0.05% + 0.01 0.1% + 0.01 0.25% + 0.05 bending test* 0.05% + 0.01 0.1% + 0.01 0.25% + 0.05 resistance to soldering heat 0.05% + 0.01 0.1% + 0.01 0.25% + 0.05 t emperatur e rapid change 0.05% + 0.01 0.1% + 0.01 0.25% + 0.05 endurance* load life 1000h 0.25% + 0.05 0.25% + 0.05 0.5% + 0.05 8000 h 0.5% + 0.05 0.5% + 0.05 1.0% + 0.05 climatic sequence* 0.25% + 0.05 0.5% + 0.05 1.0% + 0.05 damp heat steady state* 0.25% + 0.05 0.5% + 0.05 1.0% + 0.05 v / v 3 < v / v 5 2 . 0 < v / v 5 0 . 0 < e s i o n t n e r r u c h t o o m s a h t i w d e r e v o c e b l l a h s a e r a d e p p i d y t i l i b a r e d l o s and bright solder coating of at least 96% 0 1 . 5 . 0 < t n e i c i f f e o c e g a t l o v 6 /v f o o r p e g a t l o v no flashover or breakdown 25ppm ? ? 10r ? 680k tcr and t olerance range * tc 10ppm & 5ppm is specified over the temperatur e range -10c to +85c. e c n a r e l o t r c t e p y t refer ence 5% 2% 1.0% 0.5% 0.25% 0.1% 50ppm 4r7 - 110k ? ? ? ? ? wrm0102 ????? 50ppm ? ? 1r ? 5m1 10r ? 1m6 22r ? 332k 43r ? 332k 100ppm r22 ? r91 wrm0204 25ppm ? ? 4r7 - 500k 10r ? 500k 22r ? 402k 43r ? 332k 15ppm ? ? ? 10r ? 221k 22r ? 221k 43r ? 221k 10ppm ? ??? 22r ? 221k 43r ? 221k 05ppm ? ??? 100r ? 100k 100r ? 100k 1r-10m r22 ? r91 ? 100ppm wrm0207 15ppm ? ?? ?? ?? 10r - 1m 51r1 - 330k 100r - 100k 100r - 10k 51r1 - 10k 51r1 - 10k
melf resistors wrm 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 09.13 melf resistors wrm 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 01.11 w el wyn components 100 10 1 0,1 10 s 100 s 1 ms 10 ms 100 ms 1 s 10 s pulse duration t i pulse load p max wrm 0102 wrm 0204 wrm 0207 w 100 10 1 0,1 10 s 100 s 1 ms 10 ms 100 ms 1 s 10 s pulse duration t i continuous pulse load p max wrm 0102 wrm 0204 wrm 0207 w single pulse maximum pulse load continuous pulses maximum pulse load t ype wrm 0204 c - 1k0 f i size tcr v alue (use iec62 code) note: f or zero-ohm versions order wrm0204c-r00fi or wrm0207c-r00fi t olerance (use iec62 code) packing c 50ppm/oc t 10ppm/oc d 25ppm/oc v 5ppm/oc y 15ppm/oc z 100ppm/oc b 0.1% d 0.5% g 2% c 0.25% f 1% j 5% 0102 3000 / r eel (7?) i t ape 0204 3000 / r eel (7?)* standar d 0207 1500 / r eel (7?) o r dering p r ocedur e example: wrm0204 at 1 kilohm, 1% tolerance and 50ppm/oc tcr on a r eel of 3000 pieces - * high pr ecision parts may be supplied on 1000 piece r eels ? please enquir e packaging the wrm 0102 and 0204 r esistors ar e supplied r eeled on 8mm blister tape. wrm 0207 r esistors ar e supplied on 12mm blister tape. packaging complies with the r equir ements of iec 286-3. melf resistors wrm 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 01.11 w el wyn components 100 10 1 0,1 10 s 100 s 1 ms 10 ms 100 ms 1 s 10 s pulse duration t i pulse load p max wrm 0102 wrm 0204 wrm 0207 w 100 10 1 0,1 10 s 100 s 1 ms 10 ms 100 ms 1 s 10 s pulse duration t i continuous pulse load p max wrm 0102 wrm 0204 wrm 0207 w single pulse maximum pulse load continuous pulses maximum pulse load t ype wrm 0204 c - 1k0 f i size tcr v alue (use iec62 code) note: f or zero-ohm versions order wrm0204c-r00fi or wrm0207c-r00fi t olerance (use iec62 code) packing c 50ppm/oc t 10ppm/oc d 25ppm/oc v 5ppm/oc y 15ppm/oc z 100ppm/oc b 0.1% d 0.5% g 2% c 0.25% f 1% j 5% 0102 3000 / r eel (7?) i t ape 0204 3000 / r eel (7?)* standar d 0207 1500 / r eel (7?) o r dering p r ocedur e example: wrm0204 at 1 kilohm, 1% tolerance and 50ppm/oc tcr on a r eel of 3000 pieces - * high pr ecision parts may be supplied on 1000 piece r eels ? please enquir e packaging the wrm 0102 and 0204 r esistors ar e supplied r eeled on 8mm blister tape. wrm 0207 r esistors ar e supplied on 12mm blister tape. packaging complies with the r equir ements of iec 286-3. melf resistors wrm 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 01.11 w el wyn components 100 10 1 0,1 10 s 100 s 1 ms 10 ms 100 ms 1 s 10 s pulse duration t i pulse load p max wrm 0102 wrm 0204 wrm 0207 w 100 10 1 0,1 10 s 100 s 1 ms 10 ms 100 ms 1 s 10 s pulse duration t i continuous pulse load p max wrm 0102 wrm 0204 wrm 0207 w single pulse maximum pulse load continuous pulses maximum pulse load t ype wrm 0204 c - 1k0 f i size tcr v alue (use iec62 code) note: f or zero-ohm versions order wrm0204c-r00fi or wrm0207c-r00fi t olerance (use iec62 code) packing c 50ppm/oc t 10ppm/oc d 25ppm/oc v 5ppm/oc y 15ppm/oc z 100ppm/oc b 0.1% d 0.5% g 2% c 0.25% f 1% j 5% 0102 3000 / r eel (7?) i t ape 0204 3000 / r eel (7?)* standar d 0207 1500 / r eel (7?) o r dering p r ocedur e example: wrm0204 at 1 kilohm, 1% tolerance and 50ppm/oc tcr on a r eel of 3000 pieces - * high pr ecision parts may be supplied on 1000 piece r eels ? please enquir e packaging the wrm 0102 and 0204 r esistors ar e supplied r eeled on 8mm blister tape. wrm 0207 r esistors ar e supplied on 12mm blister tape. packaging complies with the r equir ements of iec 286-3. melf resistors wrm 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 01.11 w el wyn components 100 10 1 0,1 10 s 100 s 1 ms 10 ms 100 ms 1 s 10 s pulse duration t i pulse load p max wrm 0102 wrm 0204 wrm 0207 w 100 10 1 0,1 10 s 100 s 1 ms 10 ms 100 ms 1 s 10 s pulse duration t i continuous pulse load p max wrm 0102 wrm 0204 wrm 0207 w single pulse maximum pulse load continuous pulses maximum pulse load t ype wrm 0204 c - 1k0 f i size tcr v alue (use iec62 code) note: f or zero-ohm versions order wrm0204c-r00fi or wrm0207c-r00fi t olerance (use iec62 code) packing c 50ppm/oc t 10ppm/oc d 25ppm/oc v 5ppm/oc y 15ppm/oc z 100ppm/oc b 0.1% d 0.5% g 2% c 0.25% f 1% j 5% 0102 3000 / r eel (7?) i t ape 0204 3000 / r eel (7?)* standar d 0207 1500 / r eel (7?) o r dering p r ocedur e example: wrm0204 at 1 kilohm, 1% tolerance and 50ppm/oc tcr on a r eel of 3000 pieces - * high pr ecision parts may be supplied on 1000 piece r eels ? please enquir e packaging the wrm 0102 and 0204 r esistors ar e supplied r eeled on 8mm blister tape. wrm 0207 r esistors ar e supplied on 12mm blister tape. packaging complies with the r equir ements of iec 286-3.
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