copyright ? harris corporation 1995 4-39 semiconductor features ? recognized as transient voltage surge suppressors, ul file #e75961 to std. 1449 ? recognized as protectors for data communication and fire alarm circuits, ul file #e135010 to std. 497b ? surface mount chip intended for hybrid-circuit applications ? voltage ratings v m(ac)rms . . . . . . . . . . . . . . . . . . . . . . . . . 10v to 275v ? available in tape and reel for use with automatic pick and place equipment ? compatible with most surface-mounting assembly equipment and techniques ch series description ch series transient surge suppressors are small, very com- pact metal-oxide varistors. they are intended for use in hybrid circuit applications in commercial and industrial equipment utilizing direct surface-mounting techniques. these devices, which have signi?cantly lower pro?les than traditional radial-lead varistors, permit designers to reduce the size and weight and increase the reliability of their equip- ment designs. ch series varistors are available in a voltage range from 10v to 275v v m(ac)rms , and energy ratings up to 23j. absolute maximum ratings for ratings of individual members of a series, see device ratings and characteristics chart ch series units continuous: steady state applied voltage: ac voltage range (v m(ac)rms ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . dc voltage range (v m(dc) ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 to 275 14 to 369 v v transient: peak pulse current (i tm ) for 8/20 m s current wave (see figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . single pulse energy range for 10/1000 m s current wave (w tm ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 to 500 0.8 to 23 a j operating ambient temperature range (t a ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125 o c storage temperature range (t stg ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150 o c temperature coef?cient ( a v) of clamping voltage (v c ) at speci?ed test current . . . . . . . . . . . . . . <0.01 %/ o c ch series surface mount metal-oxide varistors march 1995 file number 2186.3
4-40 speci?cations ch series device ratings and speci?cations v82 - v240 ch varistors are listed under ul ?le #e75961 as a recognized component. series ch varistors are listed under ul ?le #e135010 as a recognized component. model number maximum ratings (+125 o c) specifications (+25 o c) continuous transient varistor voltage at 1ma dc test current max clamping volt v c at test current (8/20 m s) typical capaci- tance v rms v dc energy (10/1000 m s) peak current (8/20 m s) v m(ac) v m(dc) w tm i tm min v n(dc) max v c i p f = 1mhz (v) (v) (j) (a) (v) (v) (v) (v) (a) (pf) v22ch8 14 18 (note 3) 10.0 (note 2) 250 18.7 22.0 26.0 47 5 1600 v27ch8 17 22 1.0 250 23.0 27.0 31.1 57 5 1300 v33ch8 20 26 1.2 250 29.5 33.0 36.5 68 5 1100 v39ch8 25 31 1.5 250 35.0 39.0 43.0 79 5 900 v47ch8 30 38 1.8 250 42.0 47.0 52.0 92 5 800 v56ch8 35 45 2.3 250 50.0 56.0 62.0 107 5 700 v120ch8 75 102 6.0 500 108.0 120.0 132.0 200 10 300 v150ch8 95 127 8.0 500 135.0 150.0 165.0 250 10 250 v180ch8 115 153 10.0 500 162.0 180.0 198.0 295 10 200 v200ch8 130 175 11.0 500 184.0 200.0 228.0 340 10 180 v220ch8 140 180 12.0 500 198.0 220.0 242.0 360 10 160 V240CH8 150 200 13.0 500 212.0 240.0 268.0 395 10 150 v360ch8 230 300 20.0 500 324.0 360.0 396.0 595 10 100 v390ch8 250 330 21.0 500 354.0 390.0 429.0 650 10 90 v430ch8 275 369 23.0 500 389.0 430.0 473.0 710 10 80 notes: 1. power dissipation of transients not to exceed 0.25w. 2. energy rating for impulse duration of 30ms minimum to one half of peak current value. 3. also rated to withstand 24v for 5 minutes. power dissipation ratings continuous power dissipation capability is not an applicable design requirement for a suppressor, unless transients occur in rapid succession. under this condition, the average power dissipation required is simply 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 characteristics table for the speci?c device. furthermore, the operating values need to be der- ated at high temperatures as shown in figure 1. because varistors can only dissipate a relatively small amount of average power they are, therefore, not suitable for repetitive applications that involve substantial amounts of average power dissipation. figure 1. current, energy and power derating curve 100 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 ambient temperature ( o c) percent of rated value
4-41 ch series figure 2. peak pulse current test waveform transient v-i characteristics curves figure 3. clamping voltage for v18ch8 - v68ch8 figure 4. clamping voltage for v82ch8 - v430ch8 pulse rating curves figure 5. surge current rating curves for v18ch8 - v68ch8 figure 6. surge current rating curves for v82ch8 - v430ch8 note: if pulse ratings are exceeded, a shift of v n(dc) (at speci?ed current) of more than 10% could result. this type of shift, which normally results in a decrease of v n(dc) , may result in the device not meeting the original published speci?cations, but it does not prevent the device from continuing to function, and to provide ample protection. 100 90 50 10 o 1 t t 1 t 2 time percent of peak value o 1 = virtual origin of wave t = time from 10% to 90% of peak t 1 = virtual front time = 1.25 t t 2 = virtual time to half value (impulse duration) example: for an 8/20 m s current waveform: 8 m s = t 1 = virtual front time 20 m s = t 2 = virtual time to half value 500 400 300 200 100 90 80 70 60 50 40 30 20 10 maximum peak volts (v) peak amperes (a) 10 -3 10 -2 10 -1 10 0 10 1 10 2 10 3 v56ch8 v47ch8 v39ch8 v33ch8 v27ch8 v22ch8 v18ch8 maximum clamping voltage model size 5 x 8mm 18 to 56v n(dc) rating t a = -55 o c to +125 o c 4,000 3,000 2,000 1,000 900 800 700 600 500 400 300 200 100 10 -3 10 -2 10 -1 10 0 10 1 10 2 10 3 10 4 v180ch8 v150ch8 v120ch8 v100ch8 v430ch8 v390ch8 v360ch8 V240CH8 v220ch8 v200ch8 peak amperes (a) maximum peak volts (v) maximum clamping voltage model size 5 x 8mm 100 to 430v n(dc) rating t a = -55 o c to +125 o c 500 200 50 20 10 5 2 1 0.2 0.5 100 20 100 1,000 10,000 impulse duration ( m s) surge current (a) 1 2 10 10 2 10 3 10 4 10 5 10 6 indefinite model size 5 x 8mm v18ch8 - v68ch8 20 100 1,000 10,000 impulse duration ( m s) 2,000 1,000 500 200 100 50 20 10 5 2 1 1 2 10 10 2 10 3 10 4 10 5 indefinite model size 5 x 8mm v82ch8 - v430ch8 10 6 surge current (a)
4-42 ch series series dimensions ordering information standard packaging: ch series varistors are always shipped in tape and reel. the standard 13-inch reel utilized contains 4000 pieces. special packaging: option 1 - 7-inch reels containing 1000 pieces are available. to order 7-inch reels add a t suf?x to the part number; e.g., v47ch8t. option 2 - for small quantities (less than 100 pieces) the units are shipped bulk pack. to order, add a s suf?x to the part number; e.g., v47ch8s. tape and reel speci?cations ? conforms to eia-481, revision a ? can be supplied to leg publication 286-3 symbol inches millimeters min max min max d - 0.080 - 2.03 e 0.016 0.050 0.41 1.27 l 0.311 0.335 7.90 8.51 w 0.185 0.207 4.70 5.26 e passivation contact area w l d b 0 d p 2 p p 0 a 0 d 1 e f w cross section (ref. plane for a 0 & b 0 ) t r 1 r 2 k 0 a 0 r 3 b 0 h 0 k 0 section thru cavity t 1 t k minimum bending radius r 4 cavity details reeled radius details plan view of strip recommended pad outline symbol inches millimeters a 0.402 10.21 b 0.216 5.50 c 0.087 2.21 note: avoid metal runs in this area. soldering recommendations: material - 62/36/2 sn/pb/ag or equivalent. temperature - 230 o c max., 5 sec. max. flux - r.m.a. symbol parameter size (mm) b 0 cavity length 8.5 0.1 a 0 cavity width 5.5 0.1 k 0 cavity depth 2.0 min. h 0 ref. plane for a 0 and b 0 +0.10 0.3 -0.05 r 1 , r 2 , r 3 tape cavity radii 0.5 max. t carrier tape thickness 1.0 max. t 1 cover tape thickness 0.1 max. e sprocket hole from edge 1.75 0.1 p 0 sprocket hole pitch 4.0 0.1 d sprocket hole diameter +0.1 1.5 -0.0 p 2 hole centre to component centre 2.0 0.15 r 4 min. bending radius 40.0 min. d 1 ejection hole dia. 1.5 min. k overall thickness 3.0 min. p pitch of component 8.0 0.1 f sprocket hole to ejection hole 7.5 0.1 w carrier tape width 16.0 0.3 note 1 c a b
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