V33CH8

Varistor Products Surface Mount Varistors > CH Series RoHS CH Varistor Series Description 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 8J. See the Littelfuse Multilayer Suppressor Series also. Agency Approvals Recognized under the components program of Underwriters Laboratories. AGENCY AGENCY FILE NUMBER UL E320116 Features reel or bulk pack mount chip in 5 x 8mm Size VM(AC)RMS 14V to 275V 125ºC ambient Absolute Maximum Ratings Continuous Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) DC Voltage Range (VM(DC)) Transient: Peak Pulse Current (ITM) For 8/20μs Current (See Figure 2) Single Pulse Energy Range For 10/1000μs Current Wave (WTM) Operating Ambient Temperature Range (TA) Storage Temperature Range (TSTG) Temperature Coefficient ( V) of Clamping Voltage (VC) at Specified Test Current 1.0 to 8.0 -55 to +125 -55 to +150 CH Series Varistor Products Device Ratings and Specifications Maximum Ratings (125ºC) Continuous Part Number VRMS VM(AC) (V) V22CH8 V27CH8 V33CH8 V39CH8 V47CH8 V56CH8 V68CH8 V120CH8 V150CH8 V180CH8 V200CH8 V220CH8 V240CH8 V360CH8 V390CH8 V430CH8 14 17 20 25 30 35 40 75 95 115 130 140 150 230 250 275 VDC VM(DC) (V) 18 (Note 3) 22 26 31 38 45 56 102 127 153 175 180 200 300 330 369 Transient Energy (10/1000μ s) WTM (J) 1.0 (Note2) 1.0 1.0 1.0 1.2 1.4 1.5 2.0 3.0 4.0 4.0 5.0 5.0 6.0 7 .0 8.0 Peak Current (8/20μs) ITM (A) 100 100 100 100 100 100 100 250 250 250 250 250 250 250 250 250 Specifications (25ºC) Varistor Voltage at 1 mA DC Max Clamping Volt VC at Test Current (8/20μs) Test Current Typical Capacitance f=1MHz (pF) 1600 1300 750 700 650 600 500 300 250 120 110 105 100 70 60 50 MIN (V) 18.7 23.0 29.5 35.0 42.0 50.0 61.0 108.0 135.0 162.0 184.0 198.0 212.0 324.0 354.0 389.0 VN(DC) (V) 22.0 27 .0 33.0 39.0 47 .0 56.0 68.0 120.0 150.0 180.0 200.0 220.0 240.0 360.0 390.0 430.0 MAX (V) 26.0 31.1 36.5 43.0 52.0 62.0 75.0 132.0 165.0 198.0 228.0 242.0 268.0 396.0 429.0 473.0 VC (V) 47 57 68 79 92 107 127 200 250 295 340 360 395 595 650 710 IP (A) 5 5 5 5 5 5 10 10 10 10 10 10 10 10 10 10 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. 4. All Littelfuse CH Series Varistors are recognized under UL file #E320116 as a recognized component. 5. The Typical Capacitance is for reference only Current, Energy and Power Derating Curve 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 tempera tures as shown in this diagram. 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. 100 PERCENT OF RATED VALUE 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 Figure 1 AMBIENT TEMPERATURE ( oC) CH Varistor Series Revision: August 30, 2010 ©2010 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/CH.html for current information. Varistor Products Surface Mount Varistors > CH Series Peak Pulse Current Test Waveform 01 = Virtual Origin of Wave T = Time from 10% to 90% of Peak T1 = Rise Time = 1.25 x T T2 = Decay Time Example: For an 8/20 μs Current Waveform: 8μs = T1 = Rise Time 20μs = T2 = Decay Time PERCENT OF PEAK VALUE 100 90 50 10 O1 T T1 T2 TIME Figure 2 Clamping Voltage for V22CH8 – V68CH8 500 400 300 MAXIMUM PEAK VOLTS (V) 200 100 90 80 70 60 50 40 30 20 Clamping Voltage for V120CH8 – V430CH8 4,000 3,000 MAXIMUM PEAK VOLTS (V) 2,000 MAXIMUM CLAMPING VOLTAGE MODEL SIZE 5 x 8mm 100 TO 430VN(DC) RATING TA = -55oC TO 125 oC V430CH8 V390CH8 V360CH8 MAXIMUM CLAMPING VOLTAGE MODEL SIZE 5 x 8mm 22 TO 56VN(DC) RATING TA = -55oC TO 125 oC V68CH8 V56CH8 V47CH8 V39CH8 V33CH8 V27CH8 V22CH8 1,000 900 800 700 600 500 400 300 200 V180CH8 V150CH8 V120CH8 100 10 -3 10 -2 V240CH8 V220CH8 V200CH8 10 10 -3 10 -2 10 -1 10 0 10 1 10 2 10 3 10 -1 Figure 3 PEAK AMPERES (A) Figure 4 10 0 10 1 10 2 PEAK AMPERES (A) 10 3 10 4 Pulse Rating Curves Surge Current Rating Curves for V22CH8 - V56CH8 500 200 100 SURGE CURRENT (A) 50 20 10 5 2 1 0.5 0.2 20 100 1,000 IMPULSE DURATION (μs) 10,000 INDEFINITE Surge Current Rating Curves for V120CH8 - V430CH8 2,000 MODEL SIZE 5 x 8mm V120CH8 - V430CH8 1 2 10 10 2 10 3 10 4 10 5 1 2 10 10 2 10 3 MODEL SIZE 5 x 8mm V22CH8 - V56CH8 10 4 10 5 10 6 1,000 500 SURGE CURRENT (A) 200 100 50 20 10 5 2 1 20 100 10 6 INDEFINITE 1,000 IMPULSE DURATION (μs) 10,000 Figure 5 Figure 6 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. ©2010 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/CH.html for current information. CH Varistor Series Revision: August 30, 2010 CH Series Surface Mount Varistors > CH Series Varistor Products Lead (Pb) Soldering Recommendations The principal techniques used for the soldering of components in surface mount technology are IR Re-flow and Wave soldering. Typical profiles are shown on the right. CH series devices have silver-platinum terminals (Ag/Pt), and the recommended solder is 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb). Littelfuse also recommends an RMA solder flux. 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 reflow process, care should be taken to ensure that the CH 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 50ºC before cleaning. Reflow Solder Profile 250 200 TEMPERATURE °C MAXIMUM TEMPERATURE 230°C 150 100 50 0 40-80 SECONDS ABOVE 183°C RAMP RATE CH Series Part Numbering System V 220 CH 8 X LITTELFUSE VARISTOR NOMINAL VARISTOR VOLTAGE SERIES DESIGNATOR PACKAGING OPTIONS No Letter: Standard 13 Inch Reel T: 7 Inch Reel S: Bulk Pack RELATIVE SIZE INDICATOR Dimensions PAD LAYOUT DIMENSIONS C Min 0.402 0.216 0.087 0.016 0.311 0.185 Max Min Max 10.210 5.500 2.210 2.03 1.27 8.51 5.26 A B C NOTE 1 B D E L 0.080 0.050 0.335 0.207 0.41 7 .90 4.70 A W NOTE: Avoid metal runs in this area. Soldering recommendations: Material - 62/36/2 Sn/Pb/ Ag or equivalent.Temperature – 230ºC Max., 5s. Max. Flux - R.M.A. CHIP LAYOUT DIMENSIONS E D W L ©2010 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/CH.html for current information. CH Varistor Series Revision: August 30, 2010 CH Series Symbol Inches Millimeters Surface Mount Varistors > CH Series Varistor Products Tape and Reel Specifications Symbol E P0 P P2 D K0 Parameter Cavity Length Cavity Width Cavity Depth Ref. Plane for A0 and B0 Size (mm) 8.5 -/+ 0.1 5.5 -/+ 0.1 2.0 Min. + 0.10 0.3 - 0.05 0.5 Max. 1.0 Max. 0.1 Max. 1.75 -/+ 0.1 4.0 -/+ 0.1 + 0.1 1.5 - 0.0 2.0 -/+ 0.15 30.5 Min. 1.5 Min. 3.0 Min. 8.0 -/+ 0.1 7 -/+ 0.1 .5 16.0 -/+ 0.3 B0 A0 K0 W F B0 A0 PLAN VIEW OF STRIP D1 SECTION THRU CAVITY T1 T K H0 R1, R2, R3 T T1 E P0 R4 MINIMUM BENDING RADIUS Tape Cavity Radii Carrier Tape Thickness Cover Tape Thickness Sprocket Hole from Edge Sprocket Hole Pitch Sprocket Hole Diameter T CROSS SECTION (REF. PLANE FOR A 0 & B0) D R1 H0 B0 R3 A0 P2 R4 D1 K P F W Notes : Hole Centre to Component Centre Min. Bending Radius Ejection Hole Diameter Overall Thickness Pitch Of Component Sprocket Hole to Ejection Hole Carrier Tape Width R2 K0 REELED RADIUS DETAILS CAVITY DETAILS Standard Packaging* CH Series varistors are always shipped in tape and reel. The standard 13-inch reel utilized contains 4000 pieces. Note also that the CH Series receives no branding on the chip itself. *NOTE: It is recommended that parts be kept in the sealed bag provided and that parts be used as soon as possible when removed from bags. 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. 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. Option 2 CH Varistor Series Revision: August 30, 2010 ©2010 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/CH.html for current information.