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| varistor products ?2010 littelfuse, inc. revision: december 16, 2010 mla automotive varistor series surface mount multilayer varistors (mlvs) > mla automotive series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html or mla.html for current information. mla auto series mla automotive varistor series rohs description the mla automotive series of transient voltage surge suppression devices is based on the littelfuse multilayer fabrication technology. these components are designed to suppress a variety of transient events, including those speci?ed in iec 61000-4-2 or other standards used for electromagnetic compliance (emc). the mla automotive series is typically applied to protect integrated circuits and other components at the circuit board level. the wide operating voltage and energy range make the mla automotive series suitable for numerous applications on power supply, control and signal lines. the mla automotive series is manufactured from semiconducting ceramics, and is supplied in a leadless, surface mount package. the mla automtove series is compatible with modern re?ow and wave soldering procedures. it can operate over a wider temperature range than zener diodes, and has a much smaller footprint than plastic- housed components. features t " & $ 2 d p n q m j b o u t 3 p ) 4 d p n q m j b o u t - f b e m f t t
1206 and 1210 chip sizes t . v m u j m b z f s d f s b n j d construction technology t ? $ u p ? $ operating temp. range t 0 q f s b u j o h w p m u b h f s b o h f v m(dc) 7 u p 7 t 3 b u f e g p s t v s h f d v s s f o u y ? t t 3 b u f e g p s f o f s h z y ? t t * o i f s f o u c j e j s f d u j p o b m clamping t / p q m b t u j d p s f q p y z packaging assures better than ul94v-0 ?ammability rating t 4 u b o e b s e m p x capacitance types available applications t 4 v q q s f t t j p o p g inductive switching or other transient events such as eft and surge voltage at the circuit board level t & 4 % q s p u f d u j p o g p s * & $ 61000-4-2, mil-std- d n f u i p e and other industry speci?cations t 1 s p w j e f t p o c p b s e transient voltage protection for ics and transistors t 6 t f e u p i f m q b d i j f w f electromagnetic compliance of end products t 3 f q m b d f m b s h f s t v s g b d f mount tvs zeners in many applications size table metric eia 2012 1206 1210 absolute maximum ratings for ratings of individual members of a series, see device ratings and speci?cations table . continuous mla auto series units steady state applied voltage: % $ 7 p m u b h f 3 b o h f 7 m(dc) ) u p v " $ 7 p m u b h f 3 b o h f 7 . " $ 3 . 4 ) u p v transient: / p o 3 f q f u j u j w f 4 v s h f $ v s s f o u s waveform, (i tm ) v q u p a / p o 3 f q f u j u j w f 4 v s h f & o f s h z s waveform, (w tm ) u p j 0 q f s b u j o h " n c j f o u 5 f n q f s b u v s f 3 b o h f 5 a ) u p oc 4 u p s b h f 5 f n q f s b u v s f 3 b o h f 5 stg ) u p oc temperature coefficient ( d v) of clamping voltage (v c ) at specified test current <0.01 ? $ varistor products ?2010 littelfuse, inc. revision: december 16, 2010 mla automotive varistor series surface mount multilayer varistors (mlvs) > mla automotive series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html or mla.html for current information. device ratings and speci?cations part number maximum ratings (125o c ) speci?cations (25o c ) maximum continuous working voltage maximum non- repetitive surge current (8/20 s) maximum non-repetitive surge energy (10/1000 s) maximum clamping voltage at 1a (or as noted) (8/20 s) nominal voltage at 1ma dc test current typical capacitance at f = 1mhz v m(dc) v m(ac) i tm w tm v c v / % $ min v / % $ max c (v) (v) (a) (j) (v) (v) (v) (pf) 7 . - " / ) " 6 5 0 0.100 7 . - " / ) " 6 5 0 120 7 . - " - / ) " 6 5 0 40 0.100 7 . - " / ) " 6 5 0 100 6000 7 . - " / ) " 6 5 0 4.0 0.100 7 . - " / ) " 6 5 0 4.0 120 7 . - " - / ) " 6 5 0 4.0 40 0.100 400 7 . - " / ) " 6 5 0 4.0 0.400 7 . - " / ) " 6 5 0 9.0 0.100 11.0 16.0 490 7 . - " - / ) " 6 5 0 9.0 40 0.100 11.0 16.0 7 . - " - / ) " 6 5 0 12.0 9.0 40 0.100 29.0 14.0 410 7 . - " / ) " 6 5 0 14.0 10.0 0.100 7 . - " / ) " 6 5 0 14.0 10.0 120 7 . - " - / ) " 6 5 0 14.0 10.0 40 0.100 7 . - " / ) " 6 5 0 14.0 10.0 0.400 1400 7 . - " / ) " 6 5 0 14.0 0.100 22.0 120 7 . - " / ) " 6 5 0 14.0 120 44.0 22.0 7 . - " - / ) " 6 5 0 14.0 40 0.100 44.0 22.0 290 7 . - " / ) " 6 5 0 14.0 0.400 44.0 22.0 7 . - " / ) " 6 5 0 14.0 b u 22.0 1440 7 . - " / ) " 6 5 0 26.0 20.0 0.100 60.0 110 7 . - " / ) " 6 5 0 26.0 20.0 100 60.0 220 7 . - " - / ) " 6 5 0 26.0 20.0 40 0.100 60.0 140 7 . - " / ) " 6 5 0 26.0 20.0 0.600 60.0 600 7 . - " / ) " 6 5 0 26.0 20.0 1.200 b u 1040 7 . - " / ) " 6 5 0 0.100 46.0 90 7 . - " - / ) " 6 5 0 0.100 46.0 90 7 . - " / ) " 6 5 0 1.200 b u 7 . - " - / ) " 6 5 0 220 0.900 b u 7 . - " / ) " 6 5 0 26.0 49.0 7 . - " / ) " 6 5 0 42.0 92.0 46.0 60.0 7 . - " / ) " 6 5 0 40.0 1.200 b u 7 . - " - / ) " 6 5 0 40.0 220 0.900 b u / 0 5 & 4 h - h t v g m y j t b m p x d b q b d j u b o d f b o e f o f s h z w f s t j p o $ p o u b d u z p v s - j u u f m g v t f t b m f t s f q s f t f o u b u j w f g p s d v t u p n d b q b d j u b o d f s f r v j s f n f o u t 5 z q j d b m m f b l b h f b u ? $ " n b y j n v n m f b l b h f a at v m(dc) " w f s b h f q p x f s e j t t j q b u j p o p g u s b o t j f o u t g p s b o e t j [ f t o p u u p f y d f f e 8 8 8 b o e 8 s f t q f d u j w f m z varistor products ?2010 littelfuse, inc. revision: december 16, 2010 mla automotive varistor series surface mount multilayer varistors (mlvs) > mla automotive series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html or mla.html for current information. mla auto series peak current and energy derating curve when transients occur in rapid succession, the average power dissipation is the energy (watt-seconds) per pulse times the number of pulses per second. the power so developed must be within the speci?cations shown p o u i f % f w j d f 3 b u j o h t b o e 4 q f d j m d b u j p o t 5 b c m f g p s u i f t q f d j m d e f w j d f ' p s b q q m j d b u j p o t f y d f f e j o h ? $ b n c j f o u temperature, the peak surge current and energy ratings must be derated as shown below. 100 80 60 40 20 0 -55 50 60 70 80 90 100 110 120 130 140 150 percent of rated value ambient temperature ( o c) t 1 t 2 100 50 0 o 1 time percent of peak value t peak pulse current test waveform for clamping voltage 0 1 7 j s u v b m 0 s j h j o p g 8 b w f 5 5 j n f g s p n u p p g 1 f b l t 1 3 j t f 5 j n f y 5 t 2 = decay time example ' p s b o t $ v s s f o u 8 b w f g p s n s = t 1 3 j t f 5 j n f 20 s = t 2 = decay time figure 1 figure 2 varistor products ?2010 littelfuse, inc. revision: december 16, 2010 mla automotive varistor series surface mount multilayer varistors (mlvs) > mla automotive series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html or mla.html for current information. limit v-i characteristic for v3.5mla0603 to v30mla0603 limit v-i characteristic for v3.5mla0805l to v30mla0805l 1 10 100 1000 10a 100a 1ma 10ma 100ma 1a 10a 100a v5.5mla0805l v3.5mla0805l v9mla0805l v12mla0805l v14mla0805l v18mla0805l v26mla0805l v30mla0805l varistor voltage (v) current (a) 1 10 100 1000 10 a 100 a 1ma 10ma 100ma 1a 10a 100a v30mla0603 v26mla0603 v18mla0603 v14mla0603 v9mla0603, v9mla0603l v5.5mla0603, v5.5mla0603l v3.5mla0603 varistor voltage (v) current (a) figure 3 figure 4 limit v-i characteristic for v3.5mla0805 to v26mla0805 1 10 100 1000 10a 100a 1ma 10ma 100ma 1a 10a 100a 1000a v5.5mla0805 v3.5mla0805 v14mla0805 v18mla0805 v26mla0805 varistor voltage (v) current (a) limit v-i characteristic for v18mla1210 to v48mla1210 1ma 10a 100a current (a) 10ma 100ma 1a 10a 100a 1000a maximum clamping voltage maximum leakage v48mla1210, v48mla1210l v30mla1210, v30mla1210l v26mla1210 v18mla1210 100 10 varistor voltage (v) 1000 1 figure 5 limit v-i characteristic for v3.5mla1206 to v42mla1206 1 10 100 1000 10 a 100 a 1ma 10ma 100ma 1a 10a 100a 1000a current (a) v42mla1206 v33mla1206 v26mla1206 v18mla1206 v14mla1206 v5.5mla1206 v3.5mla1206 varistor voltage (v) figure 6 figure 7 varistor products ?2010 littelfuse, inc. revision: december 16, 2010 mla automotive varistor series surface mount multilayer varistors (mlvs) > mla automotive series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html or mla.html for current information. mla auto series device characteristics at low current levels, the v-i curve of the multilayer transient voltage suppressor approaches a linear (ohmic) relationship and shows a temperature dependent effect. " u p s c f m p x u i f n b y j n v n x p s l j o h w p m u b h f u i f t v q q s f t t p s j t j o b i j h i s f t j t u b o d f n p e f y b q q s p b d i j o h 6 at its n b y j n v n s b u f e x p s l j o h w p m u b h f - f b l b h f d v s s f o u t b u n b y j n v n s b u f e w p m u b h f b s f c f m p x " u z q j d b m m z a. 100% 1e -9 1e -8 suppressor current (a dc ) 10% 1e -7 1e -6 1e -5 1e -4 1e -3 1e -2 25 50 75 100 125 o c suppressor voltage in percent of v nom value at 25 o c (%) o o o o clamping voltage over temperature (v c at 10a) 100 10 20 v26mla1206 40 60 80 100 120 140 temperature ( o c) clamping voltage (v) v5.5mla1206 0 -20 -40 -60 5 z q j d b m 5 f n q f s b u v s f % f q f o e b o d f p g u i f ) b s b d u f s j t u j d $ v s w f j o u i f - f b l b h f 3 f h j p o speed of response the multilayer suppressor is a leadless device. its response time is not limited by the parasitic lead inductances found in other surface mount packages. the response time of the z / 0 e j f m f d u s j d n b u f s j b m j t m f t t u i b o o t b o e u i f . - " " v u p n p u j w f 4 f s j f t d b o d m b n q w f s z g b t u e 7 e 5 f w f o u t t v d i b t esd. additionally, in "real world" applications, the associated circuit wiring is often the greatest factor effecting speed of response. therefore, transient suppressor placement within a circuit can be considered important in certain instances. grains depletion fired ceramic dielectric region metal electrodes depletion region metal end termination multilayer internal construction energy absorption/peak current capability energy dissipated within the mla automotive series is calculated by multiplying the clamping voltage, transient current and transient duration. an important advantage of the multilayer is its interdigitated electrode construction within the mass of dielectric material. this results in f y d f m m f o u d v s s f o u e j t u s j c v u j p o b o e u i f q f b l u f n q f s b u v s f q f s f o f s h z b c t p s c f e j t w f s z m p x 5 i f n b u s j y p g t f n j d p o e v d u j o h grains combine to absorb and distribute transient energy i f b u t f f 4 q f f e p g 3 f t q p o t f 5 i j t e s b n b u j d b m m z s f e v d f t q f b l u f n q f s b u v s f u i f s n b m t u s f t t f t b o e f o i b o d f t e f w j d f reliability. as a measure of the device capability in energy and peak current handling, the v26mla1206 part was tested with n v m u j q m f q v m t f t b u j u t q f b l d v s s f o u s b u j o h " s). at the end of the test,10,000 pulses later, the device voltage characteristics are still well within speci?cation. 100 10 0 v26mla1206 2000 4000 6000 8000 10000 12000 number of pulses vo ltag e peak current = 150a 8/20 s duration, 30s between pulses 3 f q f u j u j w f 1 v m t f $ b q b c j m j u z figure 8 figure 9 figure 10 figure 11 varistor products ?2010 littelfuse, inc. revision: december 16, 2010 mla automotive varistor series surface mount multilayer varistors (mlvs) > mla automotive series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html or mla.html for current information. lead (pb) soldering recommendations 5 i f q s j o d j q b m u f d i o j r v f t v t f e g p s u i f t p m e f s j o h p g d p n q p o f o u t j o t v s g b d f n p v o u u f d i o p m p h z b s f * 3 3 f n p x and wave soldering. typical pro?les are shown on the right. the recommended solder for the mla automotive series t v q q s f t t p s j t b 4 o 1 c " h 4 o 1 c p s 4 o 1 c - j u u f m g v t f b m t p s f d p n n f o e t b o 3 . " t p m e f s n v y wave soldering is the most strenuous of the processes. to avoid the possibility of generating stresses due to thermal shock, a preheat stage in the soldering process is recommended, and the peak temperature of the solder process should be rigidly controlled. when using a re?ow process, care should be taken to ensure that the mla automotive series chip is not subjected to a thermal gradient steeper than 4 degrees q f s t f d p o e u i f j e f b m h s b e j f o u c f j o h e f h s f f t q f s t f d p o e during the soldering process, preheating to within 100 degrees of the solder's peak temperature is essential to minimize thermal shock. 0 o d f u i f t p m e f s j o h q s p d f t t i b t c f f o d p n q m f u f e j u j t still necessary to ensure that any further thermal shocks b s f b w p j e f e 0 o f q p t t j c m f d b v t f p g u i f s n b m t i p d l j t i p u printed circuit boards being removed from the solder process and subjected to cleaning solvents at room temperature. the boards must be allowed to cool gradually u p m f t t u i b o ? $ c f g p s f d m f b o j o h leadCfree (pb-free) soldering recommendations - j u u f m g v t f p g g f s t u i f / j d l f m # b s s j f s 5 f s n j o b u j p o p q u j p o t f f / t v g m y j o 1 b s u / v n c f s j o h 4 z t u f n g p s p s e f s j o h g p s u i f optimum leadCfree solder performance, consisting of a . b u u f 5 j o p v u f s t v s g b d f q m b u f e p o / j d l f m v o e f s m b z f s q m b u f e on silver base metal. 5 i f q s f g f s s f e t p m e f s j t 4 o " h $ v x j u i b o 3 . " n v y c v u u i f s f j t b x j e f t f m f d u j p o p g q b t u f t b o e n v y f t b w b j m b c m f x j u i x i j d i u i f / j d l f m # b s s j f s q b s u t t i p v m e c f compatible. 5 i f s f n p x q s p m m f n v t u c f d p o t u s b j o f e c z u i f n b y j n v n t j o u i f - f b e o g s f f 3 f n p x 1 s p m m f ' p s - f b e o g s f f x b w f t p m e f s j o h u i f 8 b w f 4 p m e f s 1 s p m m f t u j m m b q q m j f t / p u f u i f - f b e o g s f f q b t u f n v y b o e q s p m m f x f s f v t f e g p s evaluation purposes by littelfuse, based upon industry standards and practices. there are multiple choices of all u i s f f b w b j m b c m f j u j t b e w j t f e u i b u u i f d v t u p n f s f y q m p s f t u i f optimum combination for their process as processes vary considerably from site to site. preheat zone preheat dwell ramp rate <2c/s maximum temperature 230c temperature c time (minutes) 250 200 150 100 50 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 40-80 seconds above 183c time (minutes) 300 250 200 150 100 50 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 maximum wave 260c second preheat first preheat temperature c maximum temperature 260?c, time within 5?c of peak 20 seconds maximum preheat zone ramp rate <3?c/s 60 - 150 sec > 217?c temperature c time (minutes) 300 250 200 150 100 50 0 0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 re?ow solder pro?le wave solder pro?le leadCfree re-?ow solder pro?le figure 12 figure 13 figure 14 varistor products ?2010 littelfuse, inc. revision: december 16, 2010 mla automotive varistor series surface mount multilayer varistors (mlvs) > mla automotive series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html or mla.html for current information. mla auto series product dimensions (mm) / 0 5 & " w p j e n f u b m s v o t j o u i j t b s f b q b s u t o p u s f d p n n f o e f e g p s v t f j o b q q m j d b u j p o t v t j o h 4 j m w f s " h f q p y z q b t u f 1 " % - " : 0 6 5 % * . & / 4 * 0 / 4 c b a note $ ) * 1 - " : 0 6 5 % * . & / 4 * 0 / 4 e l w d dimension 1210 size 1206 size 0805 size 0603 size in mm in mm in mm in mm a 0.160 4.06 0.160 4.06 0.120 0.100 b 0.100 c 0.040 1.02 0.040 1.02 0.040 1.02 d n b y 1.10 0.040 1.00 e 0.020 0.020 0.010 0.4 l 2.01 1.6 w 0.100 0.060 1.60 0.049 part numbering system v 18 1206 packing automotive series options (see packaging table for quantities) device size: device family littelfuse tvss device x auto maximum dc working voltage mla x x capacitance option no letter: standard l: low capacitance version end termination indicator multilayer series designator n: nickel barrier (matte tin outer surface, plated on nickel underlayer plated on silver base metal) h: 7in (178mm) diameter reel, plastic carrier tape 0603 = .063 inch x .031 inch (1.6 mm x 0.8 mm) 0805 = .08 inch x .08 inch (2.0 mm x 1.25 mm) 1206 = .126 inch x .063 inch (3.2 mm x 1.6 mm) 1210 = .126 inch x .1 inch (3.2 mm x 2.5 mm) packaging* device size quantity 7 inch reel ("h" option) 1210 2,000 1206 1 b d l b h j o h * u j t s f d p n n f o e f e u i b u q b s u t c f l f q u j o u i f t f b m f e c b h q s p w j e f e b o e u i b u q b s u t c f v t f e b t t p p o b t q p t t j c m f x i f o s f n p w f e g s p n c b h t varistor products ?2010 littelfuse, inc. revision: december 16, 2010 mla automotive varistor series surface mount multilayer varistors (mlvs) > mla automotive series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html or mla.html for current information. tape and reel speci?cations symbol description dimensions in millimeters 0603, 0805, 1206 & 1210 sizes a 0 width of cavity % f q f o e f o u p o $ i j q 4 j [ f u p . j o j n j [ f 3 p u b u j p o b 0 length of cavity % f q f o e f o u p o $ i j q 4 j [ f u p . j o j n j [ f 3 p u b u j p o k 0 depth of cavity % f q f o e f o u p o $ i j q 4 j [ f u p . j o j n j [ f 3 p u b u j p o w width of tape f % j t u b o d f # f u x f f o % s j w f ) p m f $ f o u f s t b o e $ b w j u z $ f o u f s t e % j t u b o d f # f u x f f o % s j w f ) p m f $ f o u f s t b o e 5 b q f & e h f p 1 % j t u b o d f # f u x f f o $ b w j u z $ f o u f s t p 2 " y j b m % s j w f % j t u b o d f # f u x f f o % s j w f ) p m f $ f o u f s t $ b w j u z $ f o u f s t p 0 " y j b m % s j w f % j t u b o d f # f u x f f o % s j w f ) p m f $ f o u f s t d 0 % s j w f ) p m f % j b n f u f s d 1 % j b n f u f s p g $ b w j u z 1 j f s d j o h t 1 top tape thickness . b y / 0 5 & 4 t $ p o g p s n t u p & * " 3 f w j t j p o " t $ b o c f t v q q m j f e u p * & $ q v c m j d b u j p o k 0 t 1 d 0 p 0 d 1 p 1 a 0 p 2 b 0 f e w for t and h pack options: plastic carrier tape for r pack options: embossed paper carrier tape embossment top tape 8mm nominal product identifying label 178mm or 330mm dia. reel |
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