features cost efectve flameproof protecton can replace carbon comp. in many applicatons resistance values down to 0.01 ohms ideal for pulse handling applicatons general purpose cement coated wirewound resistors wa80 series dimensions (mm) and w eight (g) pcb min mounting bend wt t ype l max. d max. f min. d nom. centr es radius nom. w a82 6.2 2.8 21.20 0.6 10.20 0.6 0.22 w a83 9.0 3.6 19.80 0.8 12.70 1.2 0.50 w a835 12.5 4.5 17.80 0.8 18.40 1.2 0.50 w a84 14.5 5.2 24.55 0.8 20.30 1.2 1.10 (note 1) (note 2) note 1: 5.4 for values 0r1 note 2: 7.2 for values 0r1 w a85 16.5 7.0 23.55 0.8 22.86 1.2 1.75 g eneral purpose c e m e n t c o ated w i r e w ound resi stor s w a 8 0 s e rie s cost ef fective flamepr oof pr otection c a n r e p lac e carb o n c o mp. i n m a n y a pplicatio n s resistance values down to 0.01 ohms ideal for pulse handling applications 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 w a82 w a83 w a835 w a84 w a85 power rating at 25c watts 1 2.0 2.5 3.0 5 power rating at 70c watts .86 1.6 2.0 2.5 4.3 resistance range ohms 0r068 to 430 0r05 to 900r 0r05 to 900r 0r01 to 2k2 0r015 to 6k8 limiting element voltage volts 50 50 75 100 150 isolation voltage volts 250 250 250 350 500 1 < c / m p p r c t 1 > 0 5 3 : :200 0 1 , 5 : r 0 2 < % e c n a r e l o t e c n a t s i s e r 20r: 1, 2, 5, 10 v alues e24 pr eferr ed thermal impedance c/watt 140 110 90 82 54 5 5 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 e l ectri cal dat a physic a l d a t a 07.11 a subsidiary of tt electr onics plc w elwyn components l d f d construction a high quality ceramic substrate is assembled with interfer ence fit end caps to which ar e welded the termination wir es. the r esistive element is wound on the substrate and welded to the caps. cement pr otection is applied to the r esistor body befor e marking with indelible ink. t erminations material hot tin dipped copper wire str ength the terminations meet 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. ma ke p ossibl e resistors all pb-free parts comply with eu directve 2011/65/eu (rohs2) 07.14 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
general purpose cement coated wirewound resistors wa80 series b f 1 f 2 6 6 c body location f 1 ? f 2 1.4 mm marking w a85 r esistors ar e legend marked with type r efer ence, r esistance value and tolerance. in conformance with iec 62. w a82, 83, 835 and 84 r esistors 0r1 and above ar e colour coded with 4 bands in conformance with iec 62. v alues below 0r1 ar e 3 band marked, two digits and tolerance, ther e is no multiplier band. gen e r a l purpose cem e n t coated w i r e w ound r e sisto r s w a80 s e rie 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 07.11 w elwyn components l a c i p y t m u m i x a m load at rated power: 1000 hrs at 25 or 70c ? r% 5.0 + .001 3.0 dry heat: 1000 hrs at 200c ? r% 5.0 + .001 3.0 e v r u c g n i t a r e d e e s c 5 2 t a r e w o p d e t a r m o r f g n i t a r e d short term overload ? r% 5.0 + .001 1.0 climatic ? r% 5.0 + .001 2.0 climatic category ? r% 55/200/56 long term damp heat: 56 days ? r% 5.0 + .001 1.0 t .r.c. & v ibration ? r% 5.0 + .001 1.0 robustness & solder heat ? r% 5.0 + .001 1.0 pulse handling data available by r equest solvent resistance the body pr otection and marking ar e r esistant to all normal industrial cleaning fluids suitable for printed cir cuits. flammability the r esistor coating will not bur n under any condition of applied temperatur e or component overload. p e rforma n c e dat a appl i c ati o n note s car e must be taken when determining clearance between the r esistor body and the p .c.b. or other components. resistance is measur ed 6mm fr om body . packaging all r esistors ar e supplied tape packed r eady for loading onto automatic sequencing and insertion machines. the critical dimensions ar e shown in figur e 2. component wir es will not pr otrude beyond the outside edge of the tapes. all taped r esistors will be supplied either on r eels or in ammopacks, depending upon quantities or der ded. w a series r esistors can be supplied pr eformed. contact factory for details. figur e 2 t ype w a82 w a83 w a835 w a84 w a85 b 52 52 52 67 63 c 5 5 5 10 10 ma ke p ossibl e 07.14 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
general purpose cement coated wirewound resistors wa80 series general purpose c e men t coated w i r ewo und resistor s w a80 s e rie 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 07.11 w elwyn components o r d e r i n g p r oce d u r e e x am pl e: w a 83 at 47 0 oh m s an d 5 % t ol er an c e i n a mmo p ac k bo x of 25 00 p i ec e s - w a 8 3 ? 4 7 0 r j i 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 ) f 1 % j 5 % g 2 % k 10% p ac k i ng i w a 8 2 5000/ box sta ndar d w a 8 3 2500/ box w a 8 3 5 1500/ box w a 8 4 1000/ box w a 8 5 750/re e l ammo tape ma ke p ossibl e 07.14 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. www.ttelectronicsresistors.com
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