37 varistor products revision: january 9, 2009 ?2008 littelfuse, inc. ml varistor series surface mount multilayer varistors (mlvs) > ml series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html for current information. ml series ml varistor series rohs description the ml series family 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 ml 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 ml series suitable for numerous applications on power supply, control and signal lines. the ml series is manufactured from semiconducting ceramics, and is supplied in a leadless, surface mount package. the ml 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. littelfuse inc. manufactures other multilayer series products. see the mle series data sheet for esd applications, mhs series data sheet for high-speed esd applications, the mln series for multiline protection and the auml series for automotive applications. features t rohs compliant t - f b e m f t t
0805, 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) = 5.5v to 120v t 3 b u f e g p s t v s h f current (8 x 20 s) t 3 b u f e g p s f o f s h z (10 x 1000 s) 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 d b q b d j u b o d f types available applications t 4 v q q s f t t j p o p g j o e v d u j w f 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- 883c method 3015.7, and other industry speci?cations (see also the mle or mln series) 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 1005 0402 1608 0603 2012 0805 3216 1206 3225 1210 absolute maximum ratings for ratings of individual members of a series, see device ratings and speci?cations table . continuous ml series units steady state applied voltage: dc voltage range (v m(dc) ) 3.5 to 120 v ac voltage range (v m(ac)rms ) 2.5 to 107 v transient: non-repetitive surge current, 8/20 s waveform, (i tm ) 4 to 500 a non-repetitive surge energy, 10/1000 s waveform, (w tm ) 0.02 to 2.5 j operating ambient temperature range (t a ) -55 to +125 oc storage temperature range (t stg ) -55 to +150 oc temperature coefficient ( v) of clamping voltage (v c ) at specified test current <0.01 %/o c
38 varistor products ?2008 littelfuse, inc. revision: january 9, 2009 ml varistor series surface mount multilayer varistors (mlvs) > ml series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.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 n(dc) min v n(dc) max c (v) (v) (a) (j) (v) (v) (v) (pf) v3.5mla0603n 5 3.5 2.5 30 0.100 13.0 3.7 7.0 1270 v3.5mla0805n 3.5 2.5 120 0.300 13.0 3.7 7.0 2530 v3.5mla0805ln 3.5 2.5 40 0.100 13.0 3.7 7.0 1380 v3.5mla1206n 3.5 2.5 100 0.300 13.0 3.7 7.0 6000 v5.5mla0402n 5.5 4.0 20 0.050 21.0 7.1 10.8 220 v5.5mla0402ln 5.5 4.0 20 0.050 39.0 15.9 21.5 70 v5.5mla0603n 5 5.5 4.0 30 0.100 17.5 7.1 9.3 760 v5.5mla0603ln 4 5.5 4.0 30 0.100 17.5 7.1 9.3 450 v5.5mla0805n 5.5 4.0 120 0.300 17.5 7.1 9.3 1840 v5.5mla0805ln 5.5 4.0 40 0.100 17.5 7.1 9.3 990 v5.5mla1206n 5.5 4.0 150 0.400 17.5 7.1 9.3 3500 v9mla0402n 9.0 6.5 20 0.050 30.0 11.0 16.0 120 v9mla0402ln 9.0 6.5 4 0.020 35.0 11.0 16.0 33 v9mla0603n 5 9.0 6.5 30 0.100 25.5 11.0 16.0 490 v9mla0603ln 4 9.0 6.5 30 0.100 25.5 11.0 16.0 360 v9mla0805ln 9.0 6.5 40 0.100 25.5 11.0 16.0 520 v12mla0805ln 12.0 9.0 40 0.100 29.0 14.0 18.5 410 v14mla0402n 14.0 10.0 20 0.050 39.0 15.9 21.5 70 v14mla0603n 14.0 10.0 30 0.100 34.5 15.9 21.5 180 v14mla0805n 14.0 10.0 120 0.300 32.0 15.9 20.3 560 v14mla0805ln 14.0 10.0 40 0.100 32.0 15.9 20.3 320 v14mla1206n 14.0 10.0 150 0.400 32.0 15.9 20.3 1400 v18mla0402n 18.0 14.0 20 0.050 50.0 22.0 28.0 40 v18mla0603n 18.0 14.0 30 0.100 50.0 22.0 28.0 120 v18mla0805n 18.0 14.0 120 0.300 44.0 22.0 28.0 520 v18mla0805ln 18.0 14.0 40 0.100 44.0 22.0 28.0 290 v18mla1206n 18.0 14.0 150 0.400 44.0 22.0 28.0 1270 v18mla1210n 18.0 14.0 500 2.500 44.0 at 2.5 22.0 28.0 1440 v26mla0603n 26.0 20.0 30 0.100 60.0 31.0 38.0 110 v26mla0805n 26.0 20.0 100 0.300 60.0 29.5 38.5 220 v26mla0805ln 26.0 20.0 40 0.100 60.0 29.5 38.5 140 v26mla1206n 26.0 20.0 150 0.600 60.0 29.5 38.5 600 v26mla1210n 26.0 20.0 300 1.200 60.0 at 2.5 29.5 38.5 1040 v30mla0603n 30.0 25.0 30 0.100 74.0 37.0 46.0 90 v30mla0805ln 30.0 25.0 30 0.100 72.0 37.0 46.0 90 v30mla1210n 30.0 25.0 280 1.200 68.0 at 2.5 35.0 43.0 1820 v30mla1210ln 30.0 25.0 220 0.900 68.0 at 2.5 35.0 43.0 1760 v33mla1206n 33.0 26.0 180 0.800 75.0 38.0 49.0 500 v42mla1206n 42.0 30.0 180 0.800 92.0 46.0 60.0 425 v48mla1210n 48.0 40.0 250 1.200 105.0 at 2.5 54.5 66.5 520 v48mla1210ln 48.0 40.0 220 0.900 105.0 at 2.5 54.5 66.5 500 v56mla1206n 56.0 40.0 180 1.000 120.0 61.0 77.0 180 v60mla1210n 60.0 50.0 250 1.500 130.0 at 2.5 67.0 83.0 440 v68mla1206n 68.0 50.0 180 1.000 140.0 76.0 90.0 100 v85mla1210n 85.0 67.0 250 2.500 180.0 at 2.5 95.0 115.0 260 v120mla1210n 120.0 107.0 125 2.000 260.0 at 2.5 135.0 165.0 80 notes: 1 'l' suf?x is a low capacitance and energy version; contact your littelfuse sales representative for custom capacitance requir ements 2 typical leakage at 25oc<25 a, maximum leakage 100 a at v m(dc) ; for 0402 size, typical leakage <5 a, maximum leakage <20 a at v m(dc) 3 average power dissipation of transients for 0402, 0603, 0805, 1206 and 1210 sizes not to exceed 0.03w, 0.05w, 0.1w, 0.1w and 0.15w respectively 4 only available in 'r' packing option 5 only available in 'h','t'and 'a' packing options
39 varistor products revision: january 9, 2009 ?2008 littelfuse, inc. ml varistor series surface mount multilayer varistors (mlvs) > ml series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html for current information. ml 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 on the device ratings and speci?cations table for the speci?c device. for applications exceeding 125c ambient 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 limit v-i characteristic for v9mla0402l limit v-i characteristic for v5.5mla0402 to v18mla0402 limit v-i characteristic for v3.5mla0603 to v30mla0603 1 10 100 1a 10a 100a 1ma 10ma 1a 10a 100a v9mla0402l v5.5mla0402l varistor voltage (v) current (a) 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) 1 10 100 1a 10a 100a 1ma 10ma 1a 10a 100a current (a) v18mla0402 v14mla0402 v9mla0402 v5.5mla0402 varistor voltage (v) 0 1 = virtual origin of wave t = time from 10% to 90% of peak t 1 = rise time = 1.25 x t t 2 = decay time example - for an 8/20 s current waveform: 8 s = t 1 = rise time 20 s = t 2 = decay time figure 1 figure 2 figure 3 figure 4 figure 5 figure 6
40 varistor products ?2008 littelfuse, inc. revision: january 9, 2009 ml varistor series surface mount multilayer varistors (mlvs) > ml series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html for current information. limit v-i characteristic for v3.5mla1206 to v68mla1206 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 v120mla1210 1 10 100 1000 10 a 100 a 1ma 10ma 100ma 1a 10a 100a 1000a current (a) v68mla1206 v56mla1206 v42mla1206 v33mla1206 v26mla1206 v18mla1206 v14mla1206 v5.5mla1206 v3.5mla1206 varistor voltage (v) 1ma 10a 100a current (a) 10ma 100ma 1a 10a 100a 1000a maximum clamping voltage maximum leakage v60mla1210 v85mla1210 v120mla1210 v48mla1210, v48mla1210l v30mla1210, v30mla1210l v26mla1210 v18mla1210 100 10 varistor voltage (v) 1000 1 figure 7 figure 8 figure 9
41 varistor products revision: january 9, 2009 ?2008 littelfuse, inc. ml varistor series surface mount multilayer varistors (mlvs) > ml series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html for current information. ml 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. at or below the maximum working voltage, the suppressor is in a high resistance modex (approaching 10 6 at its maximum rated working voltage). leakage currents at maximum rated voltage are below 100 a, typically 25 a; for 0402 size below 20 a, typically 5 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 typical temperature dependance of the haracteristic curve in the leakage region 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 n o dielectric material is less than 1ns and the ml can clamp very fast dv/dt events such as 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 ml 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 excellent current distribution and the peak temperature per energy absorbed is very low. the matrix of semiconducting grains combine to absorb and distribute transient energy (heat) (see speed of response). this dramatically reduces peak temperature; thermal stresses and enhances device reliability. as a measure of the device capability in energy and peak current handling, the v26mla1206a part was tested with multiple pulses at its peak current rating (150a, 8/20 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 repetitive pulse capability figure 10 figure 11 figure 12 figure 13
42 varistor products ?2008 littelfuse, inc. revision: january 9, 2009 ml varistor series surface mount multilayer varistors (mlvs) > ml series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html for current information. lead (pb) soldering recommendations the principal techniques used for the soldering of components in surface mount technology are ir re-?ow and wave soldering. typical pro?les are shown on the right. the recommended solder for the ml suppressor is a 62/36/2 (sn/pb/ag), 60/40 (sn/pb) or 63/37 (sn/pb). littelfuse also recommends an rma solder ?ux. 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 ml chip is not subjected to a thermal gradient steeper than 4 degrees per second; the ideal gradient being 2 degrees per second. during the soldering process, preheating to within 100 degrees of the solder's peak temperature is essential to minimize thermal shock. once the soldering process has been completed, it is still necessary to ensure that any further thermal shocks are avoided. one possible cause of thermal shock is hot 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 to less than 50o c before cleaning. leadCfree (pb-free) soldering recommendations littelfuse offers the nickel barrier termination option (see "n" suf?x in part numbering system for ordering) for the optimum leadCfree solder performance, consisting of a matte tin outer surface plated on nickel underlayer, plated on silver base metal. the preferred solder is 96.5/3.0/0.5 (snagcu) with an rma ?ux, but there is a wide selection of pastes and ?uxes available with which the nickel barrier parts should be compatible. the re?ow pro?le must be constrained by the maximums in the leadCfree re?ow pro?le. for leadCfree wave soldering, the wave solder pro?le still applies. note: the leadCfree paste, ?ux and pro?le were used for evaluation purposes by littelfuse, based upon industry standards and practices. there are multiple choices of all three available, it is advised that the customer explores the 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 14 figure 15 figure 16
43 varistor products revision: january 9, 2009 ?2008 littelfuse, inc. ml varistor series surface mount multilayer varistors (mlvs) > ml series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html for current information. ml series product dimensions (mm) note : avoid metal runs in this area, parts not recommended for use in applications using silver (ag) epoxy paste. pad layout dimensions c b a note chip layout dimensions e l w d dimension 1210 size 1206 size 0805 size 0603 size 0402 size in mm in mm in mm in mm in mm a 0.160 4.06 0.160 4.06 0.120 3.05 0.100 2.54 0.067 1.70 b 0.100 2.54 0.065 1.65 0.050 1.27 0.030 0.76 0.020 0.51 c 0.040 1.02 0.040 1.02 0.040 1.02 0.035 0.89 0.024 0.61 d (max.) 0.113 2.87 0.071 1.80 0.043 1.10 0.040 1.00 0.024 0.60 e 0.020 -/+0.010 0.50 -/+0.25 0.020 -/+0.010 0.50 -/+0.25 0.020 -/+ 0.010 0.50 -/+ 0.25 0.015 -/+0.008 0.4 -/+0.20 0.010 -/+0.006 0.25 -/+0.15 l 0.125 -/+0.012 3.20 -/+0.30 0.125 -/+0.012 3.20 -/+0.30 0.079 -/+0.008 2.01 -/+0.20 0.063 -/+0.006 1.6 -/+0.15 0.039 -/+0.004 1. 0 0 -/+0.10 w 0.100 -/+0.012 2.54 -/+0.30 0.060 -/+0.011 1.60 -/+0.28 0.049 -/+0.008 1.25 -/+0.20 0.032 -/+0.060 0.8 -/+0.15 0.020 -/+0.004 0.50 -/+0.10 part numbering system v 18 1206 packing options (see packaging table for quantities) device size: i.e., 120 mil x 60 mil device family littelfuse tvss device x maximum dc working voltage mla x x capacitance option no letter: standard no letter: standard l: low capacitance version end termination option multilayer series designator (3mm x 1.5mm) n: nickel barrier option (matte tin outer surface, plated on nickel underlayer plated on silver base metal) t: 13in (330mm) diameter reel, plastic carrier tape h: 7in (178mm) diameter reel, plastic carrier tape r: 7in (178mm) diameter reel, paper carrier tape packaging* device size quantity 13 inch reel ( " t " option) 7 inch reel ( " h " option) 7 inch reel ( " r " option) bulk pack ( " a " option) 1210 8,000 2,000 n/a 2,000 1206 10,000 2,500 n/a 2,500 0805 10,000 2,500 n/a 2,500 0603 10,000 2,500 4,000 2,500 0402 n/a n/a 10,000 n/a *(packaging) it is recommended that parts be kept in the sealed bag provided and that parts be used as soon as possible when re moved from bags. *notes: 1 v120mla1210 standard shipping quantities are 1000 pieces per reel for the "h" option and 4000 pieces per reel for "t" option. 2 v3.5 mla0603, v5.5mla0603 and v9mla0603 only available in "h," "t" and "a" packing options.
44 varistor products ?2008 littelfuse, inc. revision: january 9, 2009 ml varistor series surface mount multilayer varistors (mlvs) > ml series speci?cations are subject to change without notice. please refer to www.littelfuse.com/series/ml.html for current information. tape and reel speci?cations symbol description dimensions in millimeters 0402 size 0603, 0805, 1206 & 1210 sizes a 0 width of cavity dependent on chip size to minimize rotation. b 0 length of cavity dependent on chip size to minimize rotation. k 0 depth of cavity dependent on chip size to minimize rotation. w width of tape 8 -/+0.2 8 -/+0.3 f distance between drive hole centers and cavity centers 3.5 -/+0.05 3.5 -/+0.05 e distance between drive hole centers and tape edge 1.75 -/+0.1 1.75 -/+0.1 p 1 distance between cavity centers 2-/+0.05 4 -/+0.1 p 2 axial drive distance between drive hole centers & cavity centers 2 -/+0.1 2 -/+0.1 p 0 axial drive distance between drive hole centers 4 -/+0.1 4 -/+0.1 d 0 drive hole diameter 1.55 -/+0.05 1.55 -/+0.05 d 1 diameter of cavity piercing n/a 1.05 -/+0.05 t 1 top tape thickness 0.1 max 0.1 max notes: 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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