Surface Mount Varistors Transient Voltage Surge Suppressor RoHS Pb CH Varistor Series ® CH series transient surge suppressors are small, metal-oxide varistors (MOVs) manufactured in leadless chip form. They are intended for use in a variety of applications from low voltage DC to off-line board-level protection. These devices, which have significantly lower profiles than traditional radial-lead varistors, permit designers to reduce the size and weight and increase the reliability of their equipment designs. CH series varistors are available in a voltage range from 14V to 275V VM(AC)RMS , and energy ratings up to 23J. See the Littelfuse Multilayer Suppressor Series also. Features • Lead-Free • Leadless, Surface Mount Chip in 5 x 8mm Size • Voltage Ratings VM(AC)RMS,. . . . . . . . . . . . . . . . . . . . . .14V to 275V • Supplied in Tape and Reel or Bulk Pack • No Derating up to 125oC Ambient AGENCY APPROVALS: Recognized under the components program of Underwriters Laboratories. AGENCY FILE NUMBERS: UL E75961, E135010. SURFACE MOUNT VARISTORS 3 w w w. l i t t e l f u s e . c o m 195 Surface Mount Varistors Transient Voltage Surge Suppressor Pb RoHS CH Varistor Series Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Specifications chart Continuous: CH SERIES Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 to 275 DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 to 369 Transient:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Peak Pulse Current (ITM) For 8/20µs Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 to 500 Single Pulse Energy Range For 10/1000µs Current Wave (WTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 to 23 Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125 Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 150 Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 UNITS V V V A J C O C %/OC O CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Device Ratings and Specifications MAXIMUM RATINGS (125 oC) CONTINUOUS PART NUMBER SPECIFICATIONS (25 oC) TRANSIENT VRMS VDC ENERGY (10/1000µs) VM(AC) VM(DC) WTM PEAK CURRENT (8/20µs) ITM VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MIN VN(DC) MAX CLAMPING VOLT V C AT TEST CURRENT (8/20µs) MAX VC IP TYPICAL CAPACITANCE 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 V68CH8 40 56 3.0 250 61.0 68.0 75.0 127 10 600 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. †V150 - V430 CH Varistors are recognized under UL file #E75961 as a recognized component. 196 w w w. l i t t e l f u s e . c o m Surface Mount Varistors Transient Voltage Surge Suppressor Pb RoHS CH Varistor Series 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 Specifications 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) 100 3 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) Example: For an 8/20µs Current Waveform: 8µs = T1 = Virtual Front Time 20µs = T2 = Virtual Time to Half Value 90 50 SURFACE MOUNT VARISTORS PERCENT OF PEAK VALUE FIGURE 1. CURRENT, ENERGY AND POWER DERATING CURVE 10 O1 T TIME T1 T2 FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM Transient V-I Characteristics Curves 200 100 90 80 70 60 50 40 30 4,000 MAXIMUM CLAMPING VOLTAGE MODEL SIZE 5 x 8mm 22 TO 56VN(DC) RATING TA = -55oC TO 125oC 3,000 MAXIMUM PEAK VOLTS (V) MAXIMUM PEAK VOLTS (V) 500 400 300 V68CH8 V56CH8 V47CH8 V39CH8 V33CH8 V27CH8 V22CH8 20 10 10-3 10-2 10-1 100 101 102 103 2,000 1,000 900 800 700 600 500 400 V240CH8 V220CH8 V200CH8 V430CH8 V390CH8 V360CH8 300 200 V180CH8 V150CH8 V120CH8 100 10-3 PEAK AMPERES (A) FIGURE 3. CLAMPING VOLTAGE FOR V22CH8 - V68CH8 MAXIMUM CLAMPING VOLTAGE MODEL SIZE 5 x 8mm 100 TO 430VN(DC) RATING TA = -55oC TO 125oC 10-2 10-1 100 101 102 PEAK AMPERES (A) 103 104 FIGURE 4. CLAMPING VOLTAGE FOR V120CH8 - V430CH8 w w w. l i t t e l f u s e . c o m 197 Surface Mount Varistors Transient Voltage Surge Suppressor Pb RoHS CH Varistor Series Pulse Rating Curves 2,000 500 200 2 100 10 50 102 MODEL SIZE 5 x 8mm V22CH8 - V56CH8 1 500 104 105 106 103 20 10 5 2 MODEL SIZE 5 x 8mm V120CH8 - V430CH8 1,000 SURGE CURRENT (A) SURGE CURRENT (A) 1 INDEFINITE 10 100 50 20 106 10 5 1 0.5 102 103 104 105 2 200 INDEFINITE 2 1 0.2 20 100 1,000 IMPULSE DURATION ( µs) 20 10,000 100 1,000 10,000 IMPULSE DURATION ( µs) FIGURE 6. SURGE CURRENT RATING CURVES FOR V120CH8 - V430CH8 FIGURE 5. SURGE CURRENT RATING CURVES FOR V22CH8 - V56CH8 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. Mechanical Dimensions Recommended Pad Outline D C PASSIVATION L NOTE 1 E B W A CONTACT AREA INCHES MILLIMETERS SYMBOL INCHES MILLIMETERS SYMBOL MIN MAX MIN MAX A 0.402 10.21 D - 0.080 - 2.03 B 0.216 5.50 E 0.016 0.050 0.41 1.27 C 0.087 2.21 L 0.311 0.335 7.90 8.51 W 0.185 0.207 4.70 5.26 198 NOTE: Avoid metal runs in this area. Soldering recommendations: Material - 62/36/2 Sn/Pb/Ag or equivalent. Temperature - 230o C Max., 5s. Max. Flux - R.M.A. w w w. l i t t e l f u s e . c o m Surface Mount Varistors Transient Voltage Surge Suppressor Pb RoHS CH Varistor Series Standard Packaging Special Packaging CH Series varistors are always shipped in tape and reel.The standard 13in reel utilized contains 4000 pieces. Option 1 - 7-inch reels containing 1000 pieces are available. To order Note also that the CH Series receives no branding on the chip itself. Option 2 - For small quantities (less than 100 pieces) the units are Tape and Reel Specifications shipped bulk pack. To order, add a S suffix to the part number; e.g., V47CH8S. 7in reels add a T suffix to the part number; e.g., V47CH8T. • Conforms to EIA-481, Revision A • Can be Supplied to lEG Publication 286-3 P0 E W P P2 K0 D SYMBOL F SECTION THRU CAVITY B0 D1 B0 Cavity Length 8.5 ± 0.1 A0 Cavity Width 5.5 ± 0.1 K0 Cavity Depth 2.0 Min. T1 H0 Ref. Plane for A0 and B0 K R1, R2 , R3 T T CROSS SECTION (REF. PLANE FOR A0 & B0) H0 B0 R4 MINIMUM BENDING RADIUS R3 A0 0.3 -0.05 T PLAN VIEW OF STRIP R2 K0 SIZE (mm) +0.10 A0 R1 PARAMETER 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 P0 Sprocket Hole Pitch 4.0 ± 0.1 D Sprocket Hole Diameter 0.1 Max. +0.1 1.5 -0.0 REELED RADIUS DETAILS CAVITY DETAILS P2 Hole Centre to Component Centre R4 Min. Bending Radius 40.0 Min. D1 Ejection Hole Diameter 1.5 Min. K Overall Thickness 3.0 Min. P Pitch Of Component 2.0 ± 0.15 8.0 ± 0.1 F Sprocket Hole to Ejection Hole 7.5 ± 0.1 W Carrier Tape Width 16.0 ± 0.3 SURFACE MOUNT VARISTORS 3 Ordering Information V 220 CH 8 X LITTELFUSE VARISTOR TECHNOLOGY PACKAGING OPTIONS No Letter: Standard 13 Inch Reel T: 7 Inch Reel S: Bulk Pack NOMINAL VARISTOR VOLTAGE SERIES DESIGNATOR RELATIVE SIZE INDICATOR w w w. l i t t e l f u s e . c o m 199