ultra-high value precision resistors 3810 series resistance range up to 100 t ohms (10 14 ohms) designed for low current (picoampere level) measurements low voltage coefcient hermetcally sealed leakage current minimised by hermetc sealing and guard ring resistors all parts are pb-free and comply with eu directve 2011/65/eu (rohs2) 11.17 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.ttelectronics.com/resistors bi technologies irc welwyn v ol t ag e ult r a-high v alue pr ecision r esis t or s 3810 series r esis t ance r ang e up t o 100 t ohms (10 14 ohms) designed f or lo w curr en t (pi c oamper e le v el) measur eme n ts lo w sealed leak ag e curr en t minimised b y sealing and guar d ring u l t r a - h i g h v a l u e p r ecis i o n resis t o r s 3 8 1 0 s e r i e s ? r e s i sta n c e r a n g e u p t o 1 0 0 t o h m s ( 1 0 1 4 o h m s ) ? designed for low curr ent (picoamper e level) measur ements ? low voltage coef ficient ? hermetically sealed ? leakage curr ent minimised by hermetic sealing and guar d ring 2 1 8 3 1 1 8 3 0 1 8 3 t 0 0 1 o t t 1 t 1 o t m 0 0 1 t 1 o t m 0 0 1 s m h o e g n a r e c n a t s i s e r 0 0 0 1 0 0 0 1 0 0 5 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 0 5 3 - o t 0 0 5 - c / m p p ) c 0 7 o t c 0 2 ( r c t 0 1 , 5 , 2 , 1 0 2 , 0 1 % e c n a r e l o t e c n a t s i s e r 1t to 10t ; 2, 5, 10 >10t ; 5, 10 v alues e24 pr eferr ed 0 0 1 o t 0 4 - c e g n a r e r u t a r e p m e t t n e i b m a 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 e l e c t r i c a l d a t a issue d 03.06 a subsidiary of tt electr onics plc w elwyn components construction the cermetox ? r esistive film is fir ed onto high quality ceramic substrate; brass end caps ar e for ced fitted to the substrate which is then adjusted to value with a helical cut in the film; the leads ar e mechanically locked into the end caps and the assembly sealed into the glass envelope. all close tolerance units utilise two r esistors connected in series within the glass envelope. the guar d band is described, with application notes, t erminations material solder -coated dumet wir e. 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 marking t h e s e r i a l n u m b e r , r esi s t a n c e v a l u e a n d t o l e r a n c e c o d e a r e l e g e n d m a r k e d . t h e r esi s t a n c e v a l u e m a r k i n g c o n f o r m s t o i e c 6 2 . solvent resistance the glass envelope is coated with silicone and should not be subjected to solvents or their vapours. (see application notes.) dimensions (mm) & w eight (g) pcb min. t ype l max d max f min d nom mounting bend wt. nom centr es radius 3810 25.0 6 30 0.6 29.2 0.6 1.5 3811 42.9 6 30 0.6 47.1 0.6 2.2 3812 48.0 6 30 0.6 52.2 0.6 2.5 p h y s i c a l d a t a l d f d 203 u l t r a - h i g h v a l u e p r e c i s i o n r e s i s t o r s 3 8 1 0 s e r i e s ? r e s i s t a n c e r a n g e u p t o 1 0 0 t o h m s ( 1 0 1 4 o h m s ) ? designed for low curr ent (picoamper e level) measur ements ? low voltage coef ficient ? hermetically sealed ? leakage curr ent minimised by hermetic sealing and guar d ring 2 1 8 3 1 1 8 3 0 1 8 3 t 0 0 1 o t t 1 t 1 o t m 0 0 1 t 1 o t m 0 0 1 s m h o e g n a r e c n a t s i s e r 0 0 0 1 0 0 0 1 0 0 5 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 0 5 3 - o t 0 0 5 - c / m p p ) c 0 7 o t c 0 2 ( r c t 0 1 , 5 , 2 , 1 0 2 , 0 1 % e c n a r e l o t e c n a t s i s e r 1t to 10t ; 2, 5, 10 >10t ; 5, 10 v alues e24 pr eferr ed 0 0 1 o t 0 4 - c e g n a r e r u t a r e p m e t t n e i b m a 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 e l e c tri c a l d a t a a subsidiary of tt electr onics plc w elwyn components construction the cermetox ? r esistive film is fir ed onto high quality ceramic substrate; brass end caps ar e for ced fitted to the substrate which is then adjusted to value with a helical cut in the film; the leads ar e mechanically locked into the end caps and the assembly sealed into the glass envelope. all close tolerance units utilise two r esistors connected in series within the glass envelope. the guar d band is described, with application notes, in a pr oduct information sheet, available on r equest. t erminations material solder -coated dumet wir e. 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 marking t h e s e r i a l n u m b e r , r e s i s t a n c e v a l u e a n d t o l e r a n c e c o d e a r e l e g e n d m a r k e d . t h e r e s i s t a n c e v a l u e m a r k i n g c o n f o r m s t o i e c 6 2 . solvent resistance the glass envelope is coated with silicone and should not be subjected to solvents or their vapours. (see application notes.) dimensions (mm) & w eight (g) pcb min. t ype l max d max f min d nom mounting bend wt. nom centr es radius 3810 25.0 6 30 0.6 29.2 0.6 1.5 3811 42.9 6 30 0.6 47.1 0.6 2.2 3812 48.0 6 30 0.6 52.2 0.6 2.5 phys i c a l d a t a l d f d u l t r a - h i g h v a l u e p r e c i s i o n r e s i s t o r s 3 8 1 0 s e r i e s ? r e s i s t a n c e r a n g e u p t o 1 0 0 t o h m s ( 1 0 1 4 o h m s ) ? designed for low curr ent (picoamper e level) measur ements ? low voltage coef ficient ? hermetically sealed ? leakage curr ent minimised by hermetic sealing and guar d ring 2 1 8 3 1 1 8 3 0 1 8 3 t 0 0 1 o t t 1 t 1 o t m 0 0 1 t 1 o t m 0 0 1 s m h o e g n a r e c n a t s i s e r 0 0 0 1 0 0 0 1 0 0 5 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 0 5 3 - o t 0 0 5 - c / m p p ) c 0 7 o t c 0 2 ( r c t 0 1 , 5 , 2 , 1 0 2 , 0 1 % e c n a r e l o t e c n a t s i s e r 1t to 10t ; 2, 5, 10 >10t ; 5, 10 v alues e24 pr eferr ed 0 0 1 o t 0 4 - c e g n a r e r u t a r e p m e t t n e i b m a 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 e l e c tri c a l d a t a a subsidiary of tt electr onics plc w elwyn components construction the cermetox ? r esistive film is fir ed onto high quality ceramic substrate; brass end caps ar e for ced fitted to the substrate which is then adjusted to value with a helical cut in the film; the leads ar e mechanically locked into the end caps and the assembly sealed into the glass envelope. all close tolerance units utilise two r esistors connected in series within the glass envelope. the guar d band is described, with application notes, in a pr oduct information sheet, available on r equest. t erminations material solder -coated dumet wir e. 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 marking t h e s e r i a l n u m b e r , r e s i s t a n c e v a l u e a n d t o l e r a n c e c o d e a r e l e g e n d m a r k e d . t h e r e s i s t a n c e v a l u e m a r k i n g c o n f o r m s t o i e c 6 2 . solvent resistance the glass envelope is coated with silicone and should not be subjected to solvents or their vapours. (see application notes.) dimensions (mm) & w eight (g) pcb min. t ype l max d max f min d nom mounting bend wt. nom centr es radius 3810 25.0 6 30 0.6 29.2 0.6 1.5 3811 42.9 6 30 0.6 47.1 0.6 2.2 3812 48.0 6 30 0.6 52.2 0.6 2.5 phys i c a l d a t a l d f d u l t r a - h i g h v a l u e p r e c i s i o n r e s i s t o r s 3 8 1 0 s e r i e s ? r e s i s t a n c e r a n g e u p t o 1 0 0 t o h m s ( 1 0 1 4 o h m s ) ? designed for low curr ent (picoamper e level) measur ements ? low voltage coef ficient ? hermetically sealed ? leakage curr ent minimised by hermetic sealing and guar d ring 2 1 8 3 1 1 8 3 0 1 8 3 t 0 0 1 o t t 1 t 1 o t m 0 0 1 t 1 o t m 0 0 1 s m h o e g n a r e c n a t s i s e r 0 0 0 1 0 0 0 1 0 0 5 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 0 5 3 - o t 0 0 5 - c / m p p ) c 0 7 o t c 0 2 ( r c t 0 1 , 5 , 2 , 1 0 2 , 0 1 % e c n a r e l o t e c n a t s i s e r 1t to 10t ; 2, 5, 10 >10t ; 5, 10 v alues e24 pr eferr ed 0 0 1 o t 0 4 - c e g n a r e r u t a r e p m e t t n e i b m a 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 e l e c tri c a l d a t a a subsidiary of tt electr onics plc w elwyn components construction the cermetox ? r esistive film is fir ed onto high quality ceramic substrate; brass end caps ar e for ced fitted to the substrate which is then adjusted to value with a helical cut in the film; the leads ar e mechanically locked into the end caps and the assembly sealed into the glass envelope. all close tolerance units utilise two r esistors connected in series within the glass envelope. the guar d band is described, with application notes, in a pr oduct information sheet, available on r equest. t erminations material solder -coated dumet wir e. 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 marking t h e s e r i a l n u m b e r , r e s i s t a n c e v a l u e a n d t o l e r a n c e c o d e a r e l e g e n d m a r k e d . t h e r e s i s t a n c e v a l u e m a r k i n g c o n f o r m s t o i e c 6 2 . solvent resistance the glass envelope is coated with silicone and should not be subjected to solvents or their vapours. (see application notes.) dimensions (mm) & w eight (g) pcb min. t ype l max d max f min d nom mounting bend wt. nom centr es radius 3810 25.0 6 30 0.6 29.2 0.6 1.5 3811 42.9 6 30 0.6 47.1 0.6 2.2 3812 48.0 6 30 0.6 52.2 0.6 2.5 phys i c a l d a t a l d f d r esis t or s all parts ar e pb- fr ee and c omply with eu 2011/65/eu (r ohs2) 07.16 gener al not e all inf ormation is sub ject to tt electronics? own dat a and is considered accur at e at time of going to print. ? tt electronics plc www.tt electronicsresistors.com bi t echnologies ir c w elwyn at http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/literature/3810_an.pdf v ol t ag e ult r a-high v alue pr ecision r esis t or s 3810 series r esis t ance r ang e up t o 100 t ohms (10 14 ohms) designed f or lo w curr en t (pi c oamper e le v el) measur eme n ts lo w sealed leak ag e curr en t minimised b y sealing and guar d ring u l t r a - h i g h v a l u e p r ecis i o n resis t o r s 3 8 1 0 s e r i e s ? r e s i sta n c e r a n g e u p t o 1 0 0 t o h m s ( 1 0 1 4 o h m s ) ? designed for low curr ent (picoamper e level) measur ements ? low voltage coef ficient ? hermetically sealed ? leakage curr ent minimised by hermetic sealing and guar d ring 2 1 8 3 1 1 8 3 0 1 8 3 t 0 0 1 o t t 1 t 1 o t m 0 0 1 t 1 o t m 0 0 1 s m h o e g n a r e c n a t s i s e r 0 0 0 1 0 0 0 1 0 0 5 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 0 5 3 - o t 0 0 5 - c / m p p ) c 0 7 o t c 0 2 ( r c t 0 1 , 5 , 2 , 1 0 2 , 0 1 % e c n a r e l o t e c n a t s i s e r 1t to 10t ; 2, 5, 10 >10t ; 5, 10 v alues e24 pr eferr ed 0 0 1 o t 0 4 - c e g n a r e r u t a r e p m e t t n e i b m a 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 e l e c t r i c a l d a t a issue d 03.06 a subsidiary of tt electr onics plc w elwyn components construction the cermetox ? r esistive film is fir ed onto high quality ceramic substrate; brass end caps ar e for ced fitted to the substrate which is then adjusted to value with a helical cut in the film; the leads ar e mechanically locked into the end caps and the assembly sealed into the glass envelope. all close tolerance units utilise two r esistors connected in series within the glass envelope. the guar d band is described, with application notes, t erminations material solder -coated dumet wir e. 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 marking t h e s e r i a l n u m b e r , r esi s t a n c e v a l u e a n d t o l e r a n c e c o d e a r e l e g e n d m a r k e d . t h e r esi s t a n c e v a l u e m a r k i n g c o n f o r m s t o i e c 6 2 . solvent resistance the glass envelope is coated with silicone and should not be subjected to solvents or their vapours. (see application notes.) dimensions (mm) & w eight (g) pcb min. t ype l max d max f min d nom mounting bend wt. nom centr es radius 3810 25.0 6 30 0.6 29.2 0.6 1.5 3811 42.9 6 30 0.6 47.1 0.6 2.2 3812 48.0 6 30 0.6 52.2 0.6 2.5 p h y s i c a l d a t a l d f d 203 u l t r a - h i g h v a l u e p r e c i s i o n r e s i s t o r s 3 8 1 0 s e r i e s ? r e s i s t a n c e r a n g e u p t o 1 0 0 t o h m s ( 1 0 1 4 o h m s ) ? designed for low curr ent (picoamper e level) measur ements ? low voltage coef ficient ? hermetically sealed ? leakage curr ent minimised by hermetic sealing and guar d ring 2 1 8 3 1 1 8 3 0 1 8 3 t 0 0 1 o t t 1 t 1 o t m 0 0 1 t 1 o t m 0 0 1 s m h o e g n a r e c n a t s i s e r 0 0 0 1 0 0 0 1 0 0 5 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 0 5 3 - o t 0 0 5 - c / m p p ) c 0 7 o t c 0 2 ( r c t 0 1 , 5 , 2 , 1 0 2 , 0 1 % e c n a r e l o t e c n a t s i s e r 1t to 10t ; 2, 5, 10 >10t ; 5, 10 v alues e24 pr eferr ed 0 0 1 o t 0 4 - c e g n a r e r u t a r e p m e t t n e i b m a 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 e l e c tri c a l d a t a a subsidiary of tt electr onics plc w elwyn components construction the cermetox ? r esistive film is fir ed onto high quality ceramic substrate; brass end caps ar e for ced fitted to the substrate which is then adjusted to value with a helical cut in the film; the leads ar e mechanically locked into the end caps and the assembly sealed into the glass envelope. all close tolerance units utilise two r esistors connected in series within the glass envelope. the guar d band is described, with application notes, in a pr oduct information sheet, available on r equest. t erminations material solder -coated dumet wir e. 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 marking t h e s e r i a l n u m b e r , r e s i s t a n c e v a l u e a n d t o l e r a n c e c o d e a r e l e g e n d m a r k e d . t h e r e s i s t a n c e v a l u e m a r k i n g c o n f o r m s t o i e c 6 2 . solvent resistance the glass envelope is coated with silicone and should not be subjected to solvents or their vapours. (see application notes.) dimensions (mm) & w eight (g) pcb min. t ype l max d max f min d nom mounting bend wt. nom centr es radius 3810 25.0 6 30 0.6 29.2 0.6 1.5 3811 42.9 6 30 0.6 47.1 0.6 2.2 3812 48.0 6 30 0.6 52.2 0.6 2.5 phys i c a l d a t a l d f d u l t r a - h i g h v a l u e p r e c i s i o n r e s i s t o r s 3 8 1 0 s e r i e s ? r e s i s t a n c e r a n g e u p t o 1 0 0 t o h m s ( 1 0 1 4 o h m s ) ? designed for low curr ent (picoamper e level) measur ements ? low voltage coef ficient ? hermetically sealed ? leakage curr ent minimised by hermetic sealing and guar d ring 2 1 8 3 1 1 8 3 0 1 8 3 t 0 0 1 o t t 1 t 1 o t m 0 0 1 t 1 o t m 0 0 1 s m h o e g n a r e c n a t s i s e r 0 0 0 1 0 0 0 1 0 0 5 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 0 5 3 - o t 0 0 5 - c / m p p ) c 0 7 o t c 0 2 ( r c t 0 1 , 5 , 2 , 1 0 2 , 0 1 % e c n a r e l o t e c n a t s i s e r 1t to 10t ; 2, 5, 10 >10t ; 5, 10 v alues e24 pr eferr ed 0 0 1 o t 0 4 - c e g n a r e r u t a r e p m e t t n e i b m a 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 e l e c tri c a l d a t a a subsidiary of tt electr onics plc w elwyn components construction the cermetox ? r esistive film is fir ed onto high quality ceramic substrate; brass end caps ar e for ced fitted to the substrate which is then adjusted to value with a helical cut in the film; the leads ar e mechanically locked into the end caps and the assembly sealed into the glass envelope. all close tolerance units utilise two r esistors connected in series within the glass envelope. the guar d band is described, with application notes, in a pr oduct information sheet, available on r equest. t erminations material solder -coated dumet wir e. 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 marking t h e s e r i a l n u m b e r , r e s i s t a n c e v a l u e a n d t o l e r a n c e c o d e a r e l e g e n d m a r k e d . t h e r e s i s t a n c e v a l u e m a r k i n g c o n f o r m s t o i e c 6 2 . solvent resistance the glass envelope is coated with silicone and should not be subjected to solvents or their vapours. (see application notes.) dimensions (mm) & w eight (g) pcb min. t ype l max d max f min d nom mounting bend wt. nom centr es radius 3810 25.0 6 30 0.6 29.2 0.6 1.5 3811 42.9 6 30 0.6 47.1 0.6 2.2 3812 48.0 6 30 0.6 52.2 0.6 2.5 phys i c a l d a t a l d f d u l t r a - h i g h v a l u e p r e c i s i o n r e s i s t o r s 3 8 1 0 s e r i e s ? r e s i s t a n c e r a n g e u p t o 1 0 0 t o h m s ( 1 0 1 4 o h m s ) ? designed for low curr ent (picoamper e level) measur ements ? low voltage coef ficient ? hermetically sealed ? leakage curr ent minimised by hermetic sealing and guar d ring 2 1 8 3 1 1 8 3 0 1 8 3 t 0 0 1 o t t 1 t 1 o t m 0 0 1 t 1 o t m 0 0 1 s m h o e g n a r e c n a t s i s e r 0 0 0 1 0 0 0 1 0 0 5 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 0 5 3 - o t 0 0 5 - c / m p p ) c 0 7 o t c 0 2 ( r c t 0 1 , 5 , 2 , 1 0 2 , 0 1 % e c n a r e l o t e c n a t s i s e r 1t to 10t ; 2, 5, 10 >10t ; 5, 10 v alues e24 pr eferr ed 0 0 1 o t 0 4 - c e g n a r e r u t a r e p m e t t n e i b m a 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 e l e c tri c a l d a t a a subsidiary of tt electr onics plc w elwyn components construction the cermetox ? r esistive film is fir ed onto high quality ceramic substrate; brass end caps ar e for ced fitted to the substrate which is then adjusted to value with a helical cut in the film; the leads ar e mechanically locked into the end caps and the assembly sealed into the glass envelope. all close tolerance units utilise two r esistors connected in series within the glass envelope. the guar d band is described, with application notes, in a pr oduct information sheet, available on r equest. t erminations material solder -coated dumet wir e. 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 marking t h e s e r i a l n u m b e r , r e s i s t a n c e v a l u e a n d t o l e r a n c e c o d e a r e l e g e n d m a r k e d . t h e r e s i s t a n c e v a l u e m a r k i n g c o n f o r m s t o i e c 6 2 . solvent resistance the glass envelope is coated with silicone and should not be subjected to solvents or their vapours. (see application notes.) dimensions (mm) & w eight (g) pcb min. t ype l max d max f min d nom mounting bend wt. nom centr es radius 3810 25.0 6 30 0.6 29.2 0.6 1.5 3811 42.9 6 30 0.6 47.1 0.6 2.2 3812 48.0 6 30 0.6 52.2 0.6 2.5 phys i c a l d a t a l d f d r esis t or s all parts ar e pb- fr ee and c omply with eu 2011/65/eu (r ohs2) 07.16 gener al not e all inf ormation is sub ject to tt electronics? own dat a and is considered accur at e at time of going to print. ? tt electronics plc www.tt electronicsresistors.com bi t echnologies ir c w elwyn at http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/literature/3810_an.pdf
ultra-high value precision resistors 3810 series 11.17 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.ttelectronics.com/resistors bi technologies irc welwyn ult r a-high v alue pr ecision r esis t or s 3810 series u l t r a - h i g h v a l u e p re c i s i o n r e s i s t o r s 3 8 1 0 s e r i e s ? 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 issue d 03.06 w elwyn components a p p l i c a t i o n n o t e s each r esistor is packed with a car d stating nominal r esistance value at 100 v applied, selection tolerance, date and serial number . although the glass envelope is an excellent insulant and would be adequate in a dry atmospher e, the condensation which occurs in a normal atmospher e will pr ovide a shunt r esistance which will modify the very high r esistance value. t o minimise this ef fect all units ar e coated with silicone, and it is essential that this coating is not damaged; any handling should be by the terminations. for the same r eason solvents must not be used. the r esistors should not be used in a damp atmospher e. if moistur e develops on the body the r esistor should be dried for 30 minutes at 70c and allowed to cool for a further 30 minutes in a dry atmospher e. t o avoid damage to the seal between terminations and glass, the leads must be fully supported inside the point of bending during any pr eforming. guar d band for details of how to use the guar d band, fitted to r esistors of 100 g ohms and over , non-standar d versions units without glass envelopes but with lacquer pr otection ar e available, but will have a limited electrical performance. measur ed values at a voltage other than 100v may be r ecor ded. packaging each r esistor is individually packed in a polythene envelope together with a car d carrying measur ement details and serial number (see application notes). for non-standar d items contact tt electr onics. v oltage coef ficient of r esistance ppm/volt 100m 1t 100t 3810 -20 -160 3811 -10 -80 3812 -10 -80 -150 measur ed at voltages of 100 and 500 volts or d e r in g p r o ce d u r e ex a m p l e : 3 8 1 2 a t 1 0 t e ra o h m s a n d 2 % t o l e ra n ce - 3 8 1 2 ? 1 0 t g i t yp e va l u e (u s e i ec 6 2 co d e ) t o l e ra n ce (u s e i ec 6 2 co d e ) f 1 % j 5 % g 2 % k 1 0 % pa cki n g i i n d i vi d u a l / b u l k s t a n d a r d load at rated voltage: 1000 hours at 20c ?r% ?r% ?r% pf pf 3810 3811 1 2 0.2 0.4 0.2 <0.1 maximum typical shelf life: 12 months at r oom temperatur e 1 resistance to solder heat capacitance p e r f o r m a n c e d a t a 0.5 07.16 gener al not e all inf ormation is sub ject to tt electronics? own dat a and is considered accur at e at time of going to print. ? tt electronics plc www.tt electronicsresistors.com bi t echnologies ir c w elwyn see http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/literature/3810_an.pdf
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