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 signicantly lower proles 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 (V ), and energy ratings up to 8J. M(AC)RMS See the Littelfuse Multilayer Suppressor Series also. Agency Approvals Features Recognized under the components program of Underwriters Laboratories. t FBEoGSFF - t 4VQQMJFE JO U BQF BOE reel or bulk pack AGENCY AGENCY FILE NUMBER t BDF FBEMFTT TVSG - mount chip in 5 t /P EFSBUJOH VQ UP UL E320116 x 8mm Size 125C ambient t PMU BHF SBUJOHT 7 V 14V to 275V M(AC)RMS Absolute Maximum Ratings IBSU BUJOHT BOE 4QFDJmDBUJPOT D WJDF 3 PS SBUJOHT PG JOEJWJEVBM NFNCFST PG B TFSJFT TFF %F t Continuous CH Series Units Steady State Applied Voltage: AC Voltage Range (V ) 14 to 275 V M(AC)RMS DC Voltage Range (V ) 18 to 369 V M(DC) Transient: Peak Pulse Current (I ) TM For 8/20s Current (See Figure 2) 100 to 250 A Single Pulse Energy Range For 10/1000s Current Wave (W ) 1.0 to 8.0 J TM Operating Ambient Temperature Range (T ) -55 to +125 C A Storage Temperature Range (T ) -55 to +150 C STG <0.01 %/C Temperature Coefficient (DV) of Clamping Voltage (V ) at Specified Test Current C CAUTION: Stresses above those listed inAbsolute Maximum Rating 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 specication is not implied. 2010 Littelfuse, Inc. CH Varistor Series Specications are subject to change without notice. Revision: August 30, 2010 Please refer to www.littelfuse.com/series/CH.html for current information. CH SeriesVaristor Products Surface Mount Varistors > CH Series Device Ratings and Specications Maximum Ratings (125C) Specications (25C) Varistor Voltage at 1 mA DC Max Clamping Volt V at C Continuous Transient Test Current Test Current (8/20s) Typical Part Energy Peak Current Capacitance V V Number RMS DC (10/1000 s) (8/20s) V V W I MIN V MAX V I f=1MHz M(AC) M(DC) TM TM N(DC) C P (V) (V) (J) (A) (V) (V) (V) (V) (A) (pF) V22CH8 14 18 (Note 3) 1.0 (Note2) 100 18.7 22.0 26.0 47 5 1600 V27CH8 17 22 1.0 100 23.0 27.0 31.1 57 5 1300 V33CH8 20 26 1.0 100 29.5 33.0 36.5 68 5 750 V39CH8 25 31 1.0 100 35.0 39.0 43.0 79 5 700 V47CH8 30 38 1.2 100 42.0 47.0 52.0 92 5 650 V56CH8 35 45 1.4 100 50.0 56.0 62.0 107 5 600 V68CH8 40 56 1.5 100 61.0 68.0 75.0 127 10 500 V120CH8 75 102 2.0 250 108.0 120.0 132.0 200 10 300 V150CH8 95 127 3.0 250 135.0 150.0 165.0 250 10 250 V180CH8 115 153 4.0 250 162.0 180.0 198.0 295 10 120 V200CH8 130 175 4.0 250 184.0 200.0 228.0 340 10 110 V220CH8 140 180 5.0 250 198.0 220.0 242.0 360 10 105 V240CH8 150 200 5.0 250 212.0 240.0 268.0 395 10 100 V360CH8 230 300 6.0 250 324.0 360.0 396.0 595 10 70 V390CH8 250 330 7.0 250 354.0 390.0 429.0 650 10 60 V430CH8 275 369 8.0 250 389.0 430.0 473.0 710 10 50 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 le 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 100 occur in rapid succession. Under this condition, the 90 average power dissipation required is simply the energy 80 (watt-seconds) per pulse times the number of pulses 70 per second. The power so developed must be within 60 the specications shown on the Device Ratings and 50 Specications Table for the specic device. Furthermore, 40 the operating values need to be derated at high tempera 30 20 tures as shown in this diagram. Because varistors can only 10 dissipate a relatively small amount of average power they 0 are, therefore, not suitable for repetitive applications that -55 50 60 70 80 90 100 110 120 130 140 150 involve substantial amounts of average power dissipation. o AMBIENT TEMPERATURE ( C) Figure 1 2010 Littelfuse, Inc. CH Varistor Series Specications are subject to change without notice. Revision: August 30, 2010 Please refer to www.littelfuse.com/series/CH.html for current information. PERCENT OF RATED VALUE