s e t o n 2 1 5 2 r c 0 1 0 2 r c 6 0 2 1 r c 5 0 0 1 r c 5 0 8 0 r c 3 0 5 0 r c l a i c r e m m o c power rating at 70c watts 0.063 0.125 0.125 0.25 0.5 1.0 resistance range ohms 1r to 10m 1r to 100m 1r to 1m limiting element voltage volts 50 100 150 200 400 500 tcr -55 to +155c ppm/c <10 ohms 350: 10 to 100 ohms 200: 100 to 1m ohm 100: >1m ohm 250 5 , 2 , 1 , 5 . 0 , 5 2 . 0 , 1 . 0 % e c n a r e l o t e c n a t s i s e r see table of value ranges 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 6 0 2 1 r c 5 0 8 0 r c 4 requirements requirements requirements 0 0 - 1 0 4 0 4 c c e c power rating at 70c watts 0.125 0.25 m 0 1 o t r 1 s m h o e g n a r e c n a t s i s e r limiting element voltage volts 100 200 tcr -55c to +125c ppm/c <10 ohms 200: 10 to 1m 100: >1m 200 tcr +20c to +70c ppm/c <10 ohms 200: 10 to 1m 50: >1m 100 5 , 2 , 1 , 5 . 0 % e c n a r e l o t e c n a t s i s e r see table of value ranges 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 surface mounted resistors cr series s cecc r eleased pr oducts s 100% high temperature and overload screened versions available for high reliability applications s t erminations available for wir e bonding or soldering s a vailable in sizes down to 0503 s resistance range 1 ohm to100m ohms s t olerances down to 0.1% s solder terminations have a nickel barrier layer s shorting links available general note w elwyn components r eserves the right to make changes in pr oduct specification without notice or liability . these tables indicate the cecc specification requirements, and these are met or exceeded by the corresponding cr series products 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 electrical data 07 . 07 a subsidiary of tt electr onics plc w elwyn components 2 1 5 2 r c 0 1 0 2 r c 6 0 2 1 r c 5 0 8 0 r c 8 0 0 - 1 0 4 0 4 c c e c power rating at 70c watts 0.125 0.25 0.5 1.0 resistance range ohms 1r to 10m 1r to 10m 1r to 1m 1r to 1m limiting element voltage volts 100 200 400 500 tcr -55c to +155c ppm/c <10 ohms 200: 10 to 1m ohms 100: >1m ohms 250 5 , 2 , 1 , 5 . 0 , 5 2 . 0 , 1 . 0 % e c n a r e l o t e c n a t s i s e r see table of value ranges 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 6 0 2 1 r c 5 0 8 0 r c 3 0 0 - 1 0 4 0 4 c c e c power rating at 70c watts 0.063 0.125 resistance range ohms 1r to 3m 1r to 5m limiting element voltage volts 100 200 : 0 5 3 s m h o 0 1 o t 5 : 0 0 5 s m h o 5 < c / m p p c 5 2 1 + o t c 5 5 - r c t 10 to 3m ohms 100: >3m ohms 250 5 , 2 , 1 , 5 . 0 , 5 2 . 0 % e c n a r e l o t e c n a t s i s e r see table of value ranges 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 17 d e r r e f e r p 6 9 e & 4 2 e s e u l a v any value to or der thermal impedance c/watt 800 360 290 200 80 70 mounted on custom designed pcb? s 11. 09
dimensions of standar d styles (mm) & w eight (g) w rap ar ound style l w t max a b ? c wt 0503 1.250.2 0.63.15 0.5 not available 0.200.1 0.005 0805 2.00.2 1.250.15 0.6 0.30.15 0.9 min 0.30.1 0.009 1005 2.50.3 1.250.2 0.7 not available 0.40.15 0.015 1206 3.20.2 1.60.2 0.7 0.40.2 1.7 min 0.40.15 0.020 2010 5.10.3 2.50.2 0.7 0.60.3 3.0 min n/a 0.036 2512 6.50.3 3.20.2 0.7 0.60.3 4.4 min n/a 0.055 surface mounted resistors cr 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 cecc 40401-008 cecc40401-004 cecc40401-003 actual requir ements requir ements requir ements maximum t ypical load at rated power: 1000 hours at 70c ? r% 2 2 3m3 2 2 0.25 >3m3 3 shelf life: 12 months at r oom temp. ? r% --- 0.1 0.02 derating fr om rated power at 70c zer o at 155c zer o at 125c zer o at 125c overload ? r% 0805:1 1206:0.5 0.5 2 1 0.1 dry heat: 1000 hours at uct ? r% 2 1 3m3 2 to 10m 1 0.2 1 m 0 1 > 2 m 0 1 > 3 3 m 3 > ) 8 0 0 r o f c 5 5 1 - 4 0 0 & 3 0 0 r o f c 5 2 1 ( long term damp heat ? r% 2221 0.25 t emperatur e rapid change ? r% 0.5 0.5 1 0.25 0.05 resistance to solder heat ? r% 0.5 0.5 2 0.25 0.05 0 0 1 : 3 0 5 0 0 0 3 : 6 0 2 1 0 0 2 : 5 0 8 0 s t l o v f o o r p e g a t l o v 0 0 5 : s r e h t o l l a 0 0 5 : 2 1 5 2 0 0 4 : 0 1 0 2 physical data ? this dimension determines the number of conductors which may pass under the surface mounted device. w elwyn components performance data v alue ranges (ohms) t w a a b l w rap-around terminations (3 faces) t w l planar terminations c c construction thick film r esistor material, overglaze and organic pr otection ar e scr een printed on a 96% alumina substrate. t erminations planar (or single-sided) termination is gold and suitable for wir e-bonding; wrap-ar ound is suitable for soldering. solderability w rap-ar ound terminations have an electr oplated nickel barrier and solder coating, this ensur es excellent ?leach? r esistance pr operties and solderability . they will withstand immersion in solder at 260c for 30 seconds. marking all r elevant information r ecor ded on the primary package or r eel. t olerance % 1 . 0 5 2 . 0 5 . 0 1 2 5 e z i s 0503 1 to 10m 1 to 10m 10 to 10m 100 to 1m n/a n/a 0805 1 to 100m 1 to 50m 1 to 20m 10 to 10m 100 to 1m 100 to 1m 1005 1 to 100m 1 to 50m 1 to 20m 10 to 10m 100 to 1m 100 to 1m 1206 1 to 100m 1 to 50m 1 to 25m 10 to 10m 100 to 1m 100 to 1m 2010 1 to 1m 1 to 1m 1 to 1m 10 to 10m 100 to 1m n/a 2512 1 to 1m 1 to 1m 1 to 1m 10 to 10m 100 to 1m n/a alternative styles for surface mounting resistors note: an 0.01 ohm addition to be added to the performance of all r esistors <10 ohms
surface mounted resistors cr 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 11 . 09 w elwyn components 19 operating t emperatur e range the chips themselves can operate at a maximum temperatur e of 155c (see performance claims above). for solder ed chips, the joint temperatur e should not exceed 110c. this condition is met when the stated power levels at 70c ar e used. mounting this chip r esistor is ideally suited for handling by automatic methods due to its r ectangular shape and the small dimensional tolerances. electrical connection to a ceramic substrate or to a printed cir cuit boar d can be made by wir e bonding (eg suf fix ?g? in cr0805g) or by r eflow soldering of wrap-ar ound terminations (eg suf fix ?f? in cr0805f). the ?f? terminations pr ovide good leach pr operties and ensur e r eliable contact. due to the r obust construction the r esistor chip can be immersed in the solder bath for 30 seconds at 260c. this enables the r esistor to be mounted on one side of a printed cir cuit boar d and other wir e-leaded components on the other side. packaging w rap-ar ound t ermination chip r esistors ar e supplied taped and r eeled on standar d 8mm tape to iec 286-3. quantity per r eel; 3000 max. planar t erminations resistor chips ar e supplied in waf fle packs. application notes o r dering p r ocedur e ex a m p l e : cr2512 w i t h s o l derabl e w raparound te rmi nat i ons a t 10 k ilo h m s and 1% t o l e rance on a reel o f up to 1800 p i e ce s - c r 2 5 1 2 f ? 1 0 k f i t yp e t e r mi nat i o n f s o l d e r a b l e w r apa r ound 0805, 1206 , 2 0 1 0 , 2 512 onl y g g o l d pad p l a nar a l l s i z e s va l ue (u s e iec62 code) t o l e rance (u s e iec62 code) pa cki ng i t ape 0805 f , 1206 f , 2010f u p to 300 0 / r eel s t anda r d 2512f u p to 180 0 / r eel w a ffl e g t e r m i nat i o n f o r c ecc r e l eas ed p r oduc t s t a t e on o rd e r t h e c ec c num b e r. e x a m p l e : c r 2 5 1 2 f -1 0 k f i c ec c 4 0 4 0 1 -008 f o r s n p b f i n i s h i n s t ead o f p b for zero-ohm jumper chips use the dummy value & tolerance code r005j -f r e e r epl a c e t h e p a c k i n g s u ffi x w i t h pb . e x a m p l e : cr2 5 1 2 f - 10k f pb b 0 . 1 % d 0 . 5 % g 2 % c 0 . 2 5 % f 1 % j 5 %
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