97 revised: august 31, 2011 poly-fuse ? resettable ptcs ? 2011 littelfuse, inc 250r series radial leaded > 250r series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/250r.html for current information. 250r series the 250r series is designed to protect against short duration high voltage fault currents (power cross or power induction surge) typically found in telecom applications (250vrms). the series can be used to help telecom networking equipment meet the protection requirements speci?ed in itu k.20 and k.21. electrical characteristics part number i hold (a) i trip (a) v max v int / v op i max (a) p d typ. (w) maximum time to trip resistance agency approvals current (a) time (sec.) r min ( ) r typ ( ) r 1max ( ) 250r080 0.08 0.16 250/60 3 1 0.35 3 14 22 33 xx 250r080t 0.08 0.16 250/60 3 1 0.35 3 15 22 33 xx 250r120 0.12 0.24 250/60 3 1 1 1.5 4 8 16 xx 250r120-ra 0.12 0.24 250/60 3 1 1 1.0 7 9 16 xx 250r120-rc 0.12 0.24 250/60 3 1 1 0.85 5.4 7.5 14 xx 250r120-rf 0.12 0.24 250/60 3 1 1 0.7 6 10.5 16 xx 250r120-r1 0.12 0.24 250/60 3 1 1 0.8 6 9 16 xx 250r120-r2 0.12 0.24 250/60 3 1 1 0.7 8 10.5 16 xx 250R120-R3 0.12 0.24 250/60 3 1 1 1 8 10 16 xx 250r120t 0.12 0.24 250/60 3 1 1 1.2 7 12 16 xx 250r145 0.145 0.29 250/60 3 1 1 2.5 3 6 14 xx 250r145-ra 0.145 0.29 250/60 3 1 1 5 3 5.5 12 xx 250r145-rb 0.145 0.29 250/60 3 1 1 2.5 4.5 6 14 xx 250r145t 0.145 0.29 250/60 3 1 1 2.0 5.4 7.5 14 xx 250r180 0.18 0.65 250/60 10 1.8 1 21 0.8 2.2 4 xx 250r180t 0.18 0.65 250/60 10 1.8 1 20 1.4 3.9 4.5 xx items with t at end of part number = pre-tripped device. see part ordering number system section of this data sheet for additio nal information. description features applications t o i p m e d v s s f o u range, 60vdc operating voltage t 7 " $ j o u f s s v q u s b u j o h t ' b t u u j n f o u p u s j q t # j o o f e b o e t p s u f e o b s s p x resistance ranges available t 3 p ) 4 d p n q m j b o u
- f b e ' s f f b o e ) b m p h f o ' s f f t $ v t u p n f s 1 s f n j t f t equipment (cpe) t $ f o u s b m 0 g m d f $ 0
telecom centers t - " / 8 " / f r v j q n f o u t " d d f t t f r v j q n f o u 250r series agency approvals agency agency file number e183209 r50120008 i hold ) p m e d v s s f o u n b y j n v n d v s s f o u e f w j d f x j m m q b t t x j u i p v u u s j q q j o h j o ? $ t u j m m b j s i trip 5 s j q d v s s f o u n j o j n v n d v s s f o u b u x i j d i u i f e f w j d f x j m m u s j q j o ? $ t u j m m b j s v int . b y j n v n w p m u b h f u i f e f w j d f d b o x j u i t u b o e x j u i p v u e b n b h f b u s b u f e d v s s f o u * n b y
v op = the device regular operation voltage i n b y . b y j n v n g b v m u d v s s f o u e f w j d f d b o x j u i t u b o e x j u i p v u e b n b h f b u s b u f e w p m u b h f 7 n b y ) p d 1 p x f s e j t t j q b u f e g s p n e f w j d f x i f o j o u i f u s j q q f e t u b u f b u ? $ t u j m m b j s r min = minimum resistance of device in initial (un-soldered) state. r typ = typical resistance of device in initial (un-soldered) state. r n b y . b y j n v n s f t j t u b o d f p g e f w j d f b u ? $ n f b t v s f e p o f i p v s b g u f s u s j q q j o h caution: operation beyond the speci?ed rating may result in damage and possible arcing and ?ame. & g g f d u j w f + b o v b s z
b m m 3 1 5 $ q s p e v d u t x j m m c f n b o v g b d u v s f e ) b m p h f o ' s f f ) '
& y j t u j o h / p o ) b m p h f o ' s f f 3 1 5 $ q s p e v d u t n b z d p o u j o v f u p c f t p m e
v o u j m t v q q m j f t b s f e f q m f u f e
98 revised: august 31, 2011 poly-fuse ? resettable ptcs ? 2011 littelfuse, inc. 250r series radial leaded > 250r series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/250r.html for current information. ambient operation temperature ? $ ? $ ? $ ? $ ? $ ? $ ? $ ? $ ? $ part number hold current (a) 250r080 0.12 0.11 0.09 0.08 0.06 0.05 0.05 0.04 0.03 250r080t 0.12 0.11 0.09 0.08 0.06 0.05 0.05 0.04 0.03 250r120 0.18 0.16 0.14 0.12 0.10 0.09 0.08 0.06 0.05 250r120t 0.18 0.16 0.14 0.12 0.10 0.09 0.08 0.06 0.05 250r145 0.26 0.20 0.17 0.145 0.12 0.11 0.09 0.08 0.06 250r145t 0.26 0.20 0.17 0.145 0.12 0.11 0.09 0.08 0.06 250r180 0.28 0.23 0.21 0.18 0.16 0.13 0.10 0.11 0.083 250r180t 0.28 0.23 0.21 0.18 0.16 0.13 0.10 0.11 0.083 temperature rerating temperature rerating curve -40 -30 -20 -10 0 10 20 30 40 5 0607080 10% 30% 5 0% 70% 90% 110 % 130% 1 5 0% 170% temperature (c) percentage of rated current average time current curves the average time current curves and temperature rerating curve performance is affected by a number or variables, and these curves provided as guidance only. customer must verify the performance in their application. 0.01 0.1 1 10 100 1000 10000 100000 0.080a 0.120a 0.145a 0.180a 2 5 0r 0.1 1 10 100 current in amperes time in seconds
99 revised: august 31, 2011 poly-fuse ? resettable ptcs ? 2011 littelfuse, inc 250r series radial leaded > 250r series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/250r.html for current information. 250r series protection application guide region/speci?cation application device selection south america/asia/europe itu k.45 " d d f t t o f u x p s l f r v j q n f o u remote terminal repeaters 8 " / f r v j q n f o u $ s p t t o d p o o f d u 250r180 250r180t 250r145 250r145t 250r120 250r120t south america/asia/europe itu k.21 customer and it equipment analog modems " % 4 -
y % 4 - phone sets, pbx systems internet appliances pos terminals 250r180 250r180t 250r145 250r145t 250r120 250r120t south america/asia/europe itu k.20 central of?ce pots/isdn linecards 5 & + m j o f d b s e t " % 4 - 7 % 4 - t q m j u u f s t csu/dsu 250r180 250r180t 250r145 250r145t 250r120 250r120t north america telcordia gr-974 1 s j n b s z q s p u f d u j p o n p e v m f t mdf modules network interface 250r180 250r180t 250r145 250r145t 250r120 250r120t south america/asia/europe itu k.20 north america telcordia gr-1089 * o u s b c v j m e j o h d p n n v o j d b u j p o t z t u f n t - " /
7 0 * 1 d b s e t - p d b m m p p q i b o e t f u t 250r180 250r180t 250r145 250r145t 250r120 250r120t south america/asia/europe itu k.20 and k.21 - " / * o u s b c v j m e j o h q p x f s d s p t t protection - " / f r v j q n f o u
* 1 q i p o f 250r080 3 f t j t u b o d f c j o o f e q b s u t b s f s f d p n n f o e f e agency speci?cation selection guide for telecom and networking applications product lightning power cross 250r120 250r145 * 5 6 , o l 7 ? t * 5 6 , o l 7 ? t * 5 6 , o 7 b d
? * 5 6 , o 7 b d
? 250r180 * 5 6 , o l 7 ? t * 5 6 , o l 7 ? t 5 f m d p s e j b ( 3 o o l 7 ? t * 5 6 , o 7 b d
? * 5 6 , o 7 b d
? 5 f m d p s e j b ( 3 o 7 b d
" % f w j d f t t i p v m e c f j o e f q f o e f o u m z f w b m v b u f e b o e u f t u f e g p s v t f j o b o z t q f d j m d b q q m j d b u j p o
100 revised: august 31, 2011 poly-fuse ? resettable ptcs ? 2011 littelfuse, inc. 250r series radial leaded > 250r series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/250r.html for current information. environmental speci?cations operating/storage temperature ? $ u p ? $ maximum device surface temperature in tripped state ? $ passive aging ? $ ? $
i p v s t humidity aging ? $
3 )
i p v s t thermal shock . * - o 4 5 % o '
. f u i p e ( ? $ u p ? $ u j n f t solvent resistance . * - o 4 5 % o
. f u i p e ' moisture sesitivity level - f w f m
+ o 4 5 % o $ physical speci?cations lead material tin-plated copper soldering characteristics 4 p m e f s b c j m j u z q f s . * - o 4 5 % o
method 208e insulating material $ v s f e
n b n f s f u b s e b o u f q p y z q p m z n f s n f f u t 6 - 7 s f r v j s f n f o u t device labeling . b s l f e x j u i h - ' h
w p m u b h f
d v s s f o u s b u j o h
and date code. soldering parameters - wave soldering condition 8 b w f 4 p m e f s j o h peak temp/ duration time ? $ < 5 sec > 220c 2 sec ~ 20 sec preheat 140c ~ 180c 180 sec ~ 210 sec storage condition ? $ _ ? $ < 3 ) t 3 f d p n n f o e f e t p m e f s j o h n f u i p e t i f b u f m f n f o u p w f o p s n 2 environment for lead-free. t % f w j d f t b s f e f t j h o f e u p c f x b w f t p m e f s f e u p u i f c p u u p n side of the board. t % f w j d f t d b o c f d m f b o f e v t j o h t u b o e b s e j o e v t u s z n f u i p e t and solvents. t 5 i j t q s p m m f d b o c f v t f e g p s m f b e g s f f e f w j d f note: * g t p m e f s j o h u f n q f s b u v s f t f y d f f e u i f s f d p n n f o e f e pro?le, devices may not meet the performance requirements. preheating 160 190 220 260 0 2 to 5 temperature (c) soldering cooling 20-30 180 to 210 time(s)
101 revised: august 31, 2011 poly-fuse ? resettable ptcs ? 2011 littelfuse, inc 250r series radial leaded > 250r series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/250r.html for current information. 250r series part marking system 2 5 0 080 xxxx voltage rating current rating date code (contact littelfuse for additional information) littelfuse t rademark voltage rating current rating date code (contact littelfuse for additional information) littelfuse t rademark 2 5 0 120 xxxx dimensions b b c a a e d c e d f f figure 2 figure 1 part number figure a b c d e physical characteristics inches mm inches mm inches mm inches mm inches mm lead (dia) material max. max. max. max. max. max. min. min. typ. typ. inches mm 250r080 1 0.23 5.8 0.39 9.9 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r080t 1 0.23 5.8 0.39 9.9 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r120 2 0.26 6.5 0.43 11 0.15 3.8 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r120-ra 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r120-rc 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r120-rf 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r120-r1 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r120-r2 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250R120-R3 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r120t 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r145 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r145-ra 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r145-rb 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r145t 2 0.26 6.5 0.43 11 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r180 1 0.37 9.5 0.47 12 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu 250r180t 1 0.37 9.5 0.47 12 0.18 4.6 0.19 4.7 0.20 5.1 0.026 0.65 sn/cu
102 revised: august 31, 2011 poly-fuse ? resettable ptcs ? 2011 littelfuse, inc. 250r series radial leaded > 250r series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/250r.html for current information. part ordering number system packaging style r: radial i hold current code 2 5 0 r 120 - ra z r t: pre-tripped device (optional) quantity code: f=200 m=1000 u= 5 00 z=1200 series peak voltage rating blank: bulk r: tape & ammo rx: resistance range (x = a-z or 1-9) [not applicable for all parts] (refer to packaging or electrical characteristics tables) packaging part number ordering number i hold (a) i hold code packaging option quantity quantity & packaging codes 250r080 250r080u 0.080 080 bulk 500 u 250r080zr tape and ammo 1200 zr 250r080t 250r080tu 0.080 080 bulk 500 u 250r080tzr tape and ammo 1200 zr 250r120 250r120u 0.120 120 bulk 500 u 250r120zr tape and ammo 1200 zr 250r120-ra 250r120-rau 0.120 120 bulk 500 u 250r120-razr tape and ammo 1200 zr 250r120-rc 250r120-rcu 0.120 120 bulk 500 u 250r120-rczr tape and ammo 1200 zr 250r120-rf 250r120-rfu 0.120 120 bulk 500 u 250r120-rfzr tape and ammo 1200 zr 250r120-r1 250r120-r1u 0.120 120 bulk 500 u 250r120-r1zr tape and ammo 1200 zr 250r120-r2 250r120-r2u 0.120 120 bulk 500 u 250r120-r2zr tape and ammo 1200 zr 250R120-R3 250R120-R3u 0.120 120 bulk 500 u 250R120-R3zr tape and ammo 1200 zr 250r120t 250r120tu 0.120 120 bulk 500 u 250r120tzr tape and ammo 1200 zr 250r145 250r145u 0.145 145 bulk 500 u 250r145zr tape and ammo 1200 zr 250r145-ra 250r145-rau 0.145 145 bulk 500 u 250r145-razr tape and ammo 1200 zr 250r145-rb 250r145-rbu 0.145 145 bulk 500 u 250r145-rbzr tape and ammo 1200 zr 250r145t 250r145tu 0.145 145 bulk 500 u 250r145tzr tape and ammo 1200 zr 250r180 250r180f 0.180 180 bulk 200 f 250r180mr tape and ammo 1000 mr 250r180t 250r180tf 0.180 180 bulk 200 f 250r180tmr tape and ammo 1000 mr
103 revised: august 31, 2011 poly-fuse ? resettable ptcs ? 2011 littelfuse, inc 250r series radial leaded > 250r series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/250r.html for current information. 250r series dimension eia mark iec mark dimensions dim. (mm) tol. (mm) carrier tape width ww 18 o ) p m e e p x o u b q f x j e u i w 4 w 0 11 min. top distance between tape edges w 6 w 2 3 n b y sprocket hole position w 5 w 1 9 o 4 q s p d l f u i p m f e j b n f u f s d 0 d 0 4 o abscissa to plane (straight lead) hh 18.5 o abscissa to plane (kinked lead) h 0 h 0 16 o abscissa to top h 1 h 1 32.2 n b y overall width without lead protrusion c 1 42.5 n b y overall width with lead protrusion c 2 43.2 n b y - f b e q s p u s v t j p o l 1 l 1 1. 0 n b y protrusion of cut out ll 11 n b y 1 s p u s v t j p o c f z p o e i p m e o e p x o u b q f l 2 l 2 not speci?ed 4 q s p d l f u i p m f q j u d i 3 o 3 p 0 p 0 12.7 o 4 q s p d l f u i p m f q j u d i 3 p 0 p 0 25.4 o pitch tolerance 20 consecutive. o % f w j d f q j u d i 3 o 3 12.7 % f w j d f q j u d i 3 25.4 tape thickness tt 0.9 n b y tape thickness with splice t 1 2.0 n b y splice sprocket hole alignment 0 o body lateral deviation h h 0 o body tape plane deviation p p 0 o 0 s e j o b u f u p b e k b d f o u d p n q p o f o u m f b e p 1 p 1 3.81 o - f b e t q b d j o h ff 5.1 o % j g g f s t g s p n & * " 4 q f d j g j d b u j p o tape and ammo speci?cations devices taped using eia468-b/ie286-2 standards. see table below and figure 1 for details. tape and ammo diagram a b a 1 l 1 p 0 d 0 f l w 4 h 0 i 2 h 1 w 5 w reference plane h h h 1 h c 1 c 2 h p direction of unreeling cross section a - b t figure 1
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