CH Series S E M I C O N D U C T O R Surface Mount Metal-Oxide Varistors March 1995 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 VM(AC)RMS . . . . . . . . . . . . . . . . . . . . . . . . . 10V to 275V CH SERIES * Available in Tape and Reel for use with Automatic Pick and Place Equipment * Compatible with Most Surface-Mounting Assembly Equipment and Techniques Description CH series transient surge suppressors are small, very compact metal-oxide varistors. They are intended for use in hybrid circuit applications in commercial and industrial equipment utilizing direct surface-mounting techniques. the size and weight and increase the reliability of their equipment designs. CH series varistors are available in a voltage range from 10V to 275V VM(AC)RMS, and energy ratings up to 23J. These devices, which have significantly lower profiles than traditional radial-lead varistors, permit designers to reduce Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Characteristics chart CH SERIES Continuous: Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transient: Peak Pulse Current (ITM) For 8/20s Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single Pulse Energy Range For 10/1000s Current Wave (WTM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . UNITS V V 10 to 275 14 to 369 250 to 500 A 0.8 to 23 J Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125 oC Storage Temperature Range (TSTG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150 oC Temperature Coefficient (V) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . <0.01 %/oC Copyright (c) Harris Corporation 1995 File Number 4-39 2186.3 Specifications CH Series Device Ratings and Specifications V82 - V240 CH Varistors are listed under UL file #E75961 as a recognized component. Series CH Varistors are listed under UL file #E135010 as a recognized component. MAXIMUM RATINGS (+125oC) CONTINUOUS SPECIFICATIONS (+25oC) TRANSIENT PEAK CURRENT (8/20s) TYPICAL CAPACITANCE VRMS VDC VM(AC) VM(DC) WTM ITM MIN VN(DC) MAX VC IP 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 MODEL NUMBER VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MAX CLAMPING VOLT VC AT TEST CURRENT (8/20s) ENERGY (10/1000s) 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 100 PERCENT OF RATED VALUE 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 specifications shown on the Device Ratings and Characteristics table for the specific device. Furthermore, the operating values need to be derated 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. 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE (oC) FIGURE 1. CURRENT, ENERGY AND POWER DERATING CURVE 4-40 PERCENT OF PEAK VALUE CH Series 100 90 O1 = Virtual Origin of Wave T = Time From 10% to 90% of Peak T1 = Virtual Front Time = 1.25 * t T2 = Virtual Time to Half Value (Impulse Duration) 50 Example: For an 8/20s Current Waveform: 8s = T1 = Virtual Front Time 20s = T2 = Virtual Time to Half Value 10 O1 T TIME T1 T2 FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM Transient V-I Characteristics Curves 4,000 MAXIMUM CLAMPING VOLTAGE MODEL SIZE 5 x 8mm 18 TO 56VN(DC) RATING TA = -55oC TO +125oC 200 100 90 80 70 60 50 40 3,000 MAXIMUM PEAK VOLTS (V) MAXIMUM PEAK VOLTS (V) 500 400 300 V56CH8 V47CH8 V39CH8 V33CH8 V27CH8 V22CH8 V18CH8 30 20 10 10-3 10-2 10-1 100 101 PEAK AMPERES (A) 102 103 FIGURE 3. CLAMPING VOLTAGE FOR V18CH8 - V68CH8 2,000 1,000 900 800 700 600 500 400 MAXIMUM CLAMPING VOLTAGE MODEL SIZE 5 x 8mm 100 TO 430VN(DC) RATING TA = -55oC TO +125oC V430CH8 V390CH8 V360CH8 V240CH8 V220CH8 V200CH8 300 200 V180CH8 V150CH8 V120CH8 V100CH8 100 10-2 10-3 10-1 100 101 102 PEAK AMPERES (A) 103 104 FIGURE 4. CLAMPING VOLTAGE FOR V82CH8 - V430CH8 Pulse Rating Curves 500 2,000 200 2 100 10 50 102 MODEL SIZE 5 x 8mm V18CH8 - V68CH8 500 104 105 106 103 20 10 5 2 INDEFINITE 0.5 1 102 103 104 105 2 200 10 100 50 20 106 10 5 1 0.2 20 MODEL SIZE 5 x 8mm V82CH8 - V430CH8 1,000 SURGE CURRENT (A) SURGE CURRENT (A) 1 INDEFINITE 2 100 1,000 IMPULSE DURATION (s) 10,000 FIGURE 5. SURGE CURRENT RATING CURVES FOR V18CH8 - V68CH8 1 20 100 1,000 IMPULSE DURATION (s) 10,000 FIGURE 6. SURGE CURRENT RATING CURVES FOR V82CH8 - V430CH8 NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than 10% could result. This type of shift, which normally results in a decrease of VN(DC), may result in the device not meeting the original published specifications, but it does not prevent the device from continuing to function, and to provide ample protection. 4-41 CH Series Series Dimensions Recommended Pad Outline D PASSIVATION C L E NOTE 1 B W A CONTACT AREA INCHES MILLIMETERS SYMBOL 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 W 0.185 0.207 4.70 SYMBOL INCHES MILLIMETERS A 0.402 10.21 8.51 B 0.216 5.50 5.26 C 0.087 2.21 NOTE: Avoid metal runs in this area. Soldering recommendations: Material - 62/36/2 Sn/Pb/Ag or equivalent. Temperature - 230o C max., 5 sec. max. Flux - R.M.A. 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 suffix 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 suffix to the part number; e.g., V47CH8S. SYMBOL Tape and Reel Specifications * Conforms to EIA-481, Revision A * Can be Supplied to lEG Publication 286-3 E P0 P P2 PARAMETER SIZE (mm) B0 Cavity Length 8.5 0.1 A0 Cavity Width 5.5 0.1 K0 Cavity Depth 2.0 Min. H0 Ref. Plane for A0 and B0 K0 D +0.10 0.3 -0.05 W R1, R2, R3 F SECTION THRU CAVITY B0 A0 D1 T T1 T PLAN VIEW OF STRIP Tape Cavity Radii 0.5 Max. Carrier Tape Thickness 1.0 Max. T1 Cover Tape Thickness E Sprocket Hole from Edge 1.75 0.1 0.1 Max. P0 Sprocket Hole Pitch 4.0 0.1 D Sprocket Hole Diameter +0.1 K 1.5 -0.0 T CROSS SECTION (REF. PLANE FOR A0 & B0) H0 B0 R1 R2 K0 R3 A0 R4 MINIMUM BENDING RADIUS REELED RADIUS DETAILS CAVITY DETAILS 4-42 2.0 0.15 P2 Hole Centre to Component Centre R4 Min. Bending Radius 40.0 Min. D1 Ejection Hole Dia. 1.5 Min. K Overall Thickness P Pitch Of Component 3.0 Min. 8.0 0.1 F Sprocket Hole to Ejection Hole 7.5 0.1 W Carrier Tape Width 16.0 0.3