varistor application note

throughput. for Inrush Current Limiting . A metal-oxide-varistor will provide results similar to those of transient suppressor diode, but will have a higher "on-state" impedance and will thus allow a higher voltage to be developed. EPCOS Application Note 2013 . A varistor is an electronic component with an electrical resistance that varies with the applied voltage. APPLICATION NOTE 2/2 poor medium-power dissipation performance of the Varistor. They suppress the high inrush current surges occurring in cases such as the charging of low-impedance smoothing capacitors. ˞m"�!Bh Once these variables can be approximated, a suitable suppressor technology can be selected. Solution Guide New "TDMA Noise Countermeasures, Reception Sensitivity Improvement, and ESD (Electrostatic Discharge) Countermeasures in Microphone Lines, Using Noise Suppression … 2018-11-13T14:30:16.682-05:00 10-14 A further advantage of this type of construction is that the breakdown voltage of the device is dependent on the thickness between the electrode layers (dielectric thickness) and not the overall thickness of the device. 175 0 obj Applications Surge protection device AC/DC distribution Inverters UPS(Uninterruptable Power Supply) Telecommunication Household application Varistors provide reliable and economical protection against high voltage transients and surges which may be produced, for example, by lightning, switching or electrical noise on AC or DC power lines. 2. Component values selected must be appropriate for the specific AC line voltage service and application. j�ĒTLiF=�eaQ�=�Cx�!�" ���G�}�h���awZ�յ�e�d��CvŶ%J+4X�H�y/+?��N�'�=�J��.��ńE�am:Q�� 2.3 Reliability in overload conditions See figure 3. 119 0 obj SIOVs These parts are then electroded with either thick film silver or arc/flame sprayed metal. Varistors can be applied to prevent initiation of the arc. <>  For SurgeExtend the Life of Relay Contacts When the current in inductive load is interrupted by mechanical contacts, the voltage across the contacts builds up and causes arcing which is destructive to the contacts. It is important to note that a varistor has to be properly selected from a wide range of before use. )6!�ںp�����e�\-L��L?�`_w��{×�&XHs��~��JqX�U�S+`�#�I���+����{��:$�o�Xa����T�灁�{�Q�%�e��1��(���1��M��JHH$"�LHPu�OX�'!�nW�f�SKY'���^b�=�q/�[*]�uq���x�A�!wQ� j�*�M͖(��%Wae�qIw� As the name Varistor suggests, it is a variable resistor. Adobe PDF Library 15.0 The usage in industry-applications is more and more common. <> It is depicted as a variable resistor which is dependent on voltage, U. Varistor symbolIEC standard. <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/Properties<>/XObject<>>>/Rotate 0/Tabs/W/Thumb 42 0 R/TrimBox[0 0 612 792]/Type/Page>> The advantages are . ���{�BL;B����B��"�Tr�)۞r~w�r�ҝ�!���|'jlN AUMOV Series Part Numbering System Application note Transil™ clamping protection mode Introduction The Transil (a) is an avalanche diode specially designed to clamp over voltages and dissipate high transient power. Important notes at the end of this document. ® APPLICATION NOTE TRANSIENT PROTECTION SOLUTIONS: Transil™ diode versus Varistor AN1826/0104 A. BREMOND / C. KAROUI Since the seventies, electronic modules are more and more present in our life. It is a very sensitive and fast over-voltage protection device. Multilayer varistors application notes | Technical Note 4047 | Eaton False The device selected would require a voltage rating of 130VACRMS or higher. A varistor is a voltage variable resistor that: • At low voltages has an extremely high resistance • At high voltages has a very low resistance MLVs are made using multiple, fine grain ceramic layers of a specific formulation. Protection components are largely divided into four categories: Zener diodes (TVS diodes), multilayer chip varistors (MLVs), ESD suppressors, and multilayer ceramic chip capacitors (ML… 191911 Soldering Recommendations for Surface Mount and Multilayer Metal Oxide Varistors Application note This application note discusses recommendations for soldering surfacemount. NOTESAPPLICATION This note is meant to be a guide for the user in selecting a varistor by describing common application examples,and illus- trating the solution process to determine the appropriate varisor. ��`O�3�3.b� ��+������5���Ć57��{�QC��ELox^000`������-��1������}1�2�w5��1��xe�mX�y�V �k#�X��(fa�b�к�����S�4����� ��2��M��43P��Q�G��%n �0�V�2o� �Y� endstream endobj 156 0 obj 394 endobj 102 0 obj << /Type /Page /Parent 89 0 R /Resources 103 0 R /Contents [ 107 0 R 109 0 R 111 0 R 122 0 R 130 0 R 134 0 R 136 0 R 138 0 R ] /Thumb 67 0 R /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 103 0 obj << /ProcSet [ /PDF /Text ] /Font << /F1 131 0 R /F2 117 0 R /F3 124 0 R /F4 104 0 R /F5 118 0 R /F6 127 0 R /F7 119 0 R /F9 125 0 R >> /ExtGState << /GS1 148 0 R /GS2 139 0 R /GS3 141 0 R >> /Properties << /MC1 149 0 R /MC2 150 0 R /MC3 151 0 R /MC4 152 0 R /MC5 153 0 R /MC6 154 0 R >> >> endobj 104 0 obj << /Type /Font /Subtype /Type1 /FirstChar 32 /LastChar 181 /Widths [ 333 333 500 660 667 1000 889 278 389 389 556 660 333 333 333 278 667 667 667 667 667 667 667 667 667 667 333 333 660 660 660 611 740 778 778 778 778 722 667 833 833 389 667 833 667 944 833 833 722 833 778 722 722 833 778 1000 778 778 722 389 278 389 660 500 333 667 667 667 667 667 389 667 667 333 333 667 333 1000 667 667 667 667 444 611 444 667 611 944 667 611 556 389 278 389 660 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 333 667 667 333 333 333 333 333 800 333 333 333 333 333 333 333 660 333 333 333 667 ] /Encoding /WinAnsiEncoding /BaseFont /Helvetica-Black /FontDescriptor 105 0 R >> endobj 105 0 obj << /Type /FontDescriptor /Ascent 720 /CapHeight 720 /Descent -178 /Flags 262176 /FontBBox [ -167 -232 1007 1013 ] /FontName /Helvetica-Black /ItalicAngle 0 /StemV 208 /XHeight 524 /FontFile3 143 0 R >> endobj 106 0 obj 3047 endobj 107 0 obj << /Filter /FlateDecode /Length 106 0 R >> stream 8.5 eaton:product-taxonomy/electronics/circuit-protection/overvoltage-protection/mlvb-overvoltage-esd-protection eaton:language/en-us }�5Q\�; <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/Properties<>/XObject<>>>/Rotate 0/Tabs/W/Thumb 41 0 R/TrimBox[0 0 612 792]/Type/Page>> This application note describes how to set up and take these measurements using the Model 2400, including calculating the … 1. Peak voltage across the varistor measured under conditions of a specified peak V C pulse current and specified waveform. �)���+%�c���S��Cw'��]z������ �*�rd!���n�Ʉc�N��Zh]��ºG����=M��� �CX�u��։��*=L}�ȉ%��1�ί��"e����c̚�(nj��B�|m���3���� *0#U��>�H`l�6>�D�O�nQ�A�H�,M9�F�0S�5�T�fe��r��h��w�V��� �AV�Q�0� �tҐ � >���(�)6A�^やG� �-[�;�ڒ��Ƨk�t�=��a䬭�,�k��~�OQ�A���@�8�`@�F�!�!���p6CT���.��;Gi1���S��|�f�@'Q�.P��[�"Z�!Tt^&���[\Dۡ This Application Note discusses the first level considerations for applying Littelfuse Industrial AC Line Metal Oxide Varistors with a motor protection example. 2018-11-13T14:33:07.463-05:00 eaton:resources/technical-resources/application-notes The diagram at right shows a transient which is the result of stored energy within the alternator of an automobile charging system. When Books. false »Application Note "Chip Varistors that Excel in Resisting Repeated Surges" » Application Note "Comparison between chip varistors and MLCCs as ESD protection" » Application Note (PDF) - Solution Guides » Solution Guide "TDMA Noise Countermeasures, Reception Sensitivity Improvement, and ESD (Electrostatic Discharge) Countermeasures in Microphone Lines, �^+id��y)Af��P�5k��^��z���S��b��>};���/��'1�k@�2��\$��sQs��Fna��#>��0�m��C;�v+�!�R���'E*�iYc|��e_*�(g��i��m��>_��O>�o����(q�&n�\��D���W��^��TX� ;�������hWZt��m_��_���(����}�'ޕDZW��v��a i�T��c��D��w�1�+`n���Ԣ� I��@���Z��p�� �+�4��X��k,4�=��T�h�$,C�}��p�������:TZ,j�.LA����@����_��� ���q�����h�(����1�j0ۃv". 10-144 The Littelfuse Varistor specification sheets show the VI characteristic of the devices on the basis of maximum voltage appearing across the device during a current pulse of 8/20 µ s. If current impulses of equal magnitude but faster rise are applied to the varistor, higher voltages will appear across the device. Eaton The main criteria being voltage which should be 15 to 20 percent above the operating voltage. 10.11 A. Metal Oxide Varistor B72230M ***M401 Thermal Protective Varistor MT30*** PPD VAR PD 2020-01-10 Please read Cautions and warnings and Page 2 of 10 Important notes at the end of this document. I TM Lifetime Rated Pulse Currents. Introduction Varistor is a passive nonlinear two terminal solid state semiconductor device. <>stream endobj This note details the common tests of varistor parameters and describes suitable test methods using simpli˜ed test circuits. consider a varistor applied to protect the power terminals of electrical equipment. eaton:product-taxonomy/electronics/circuit-protection/overvoltage-protection/mlva-r-overvoltage-esd-protection application, the wave shape, duration, peak current and peak voltage are all variables which exist in real world transients. !�aquqٴ��,�o����a���p�B4rX�k(N�$�M����a9�� It can be divided into junction varistor, bulk varistor, single particle layer varistor, thin film varistor and so on. 5) General technical information Please read Important notes Page 8 of 22 and Cautions and warnings. MMOVcomponents. The term MOV stands for “Metal Oxide Varistor”. Resources. The aim of this article is to clarify the difference between varistors and diodes and to introduce data that can be used to compare the two. Much of the information presented here is generic to all four. 3a2512fce12151a3a9cd0caab3238e01164164d8 endobj ?���]J�3@N=��~�Sġ�?�q�(s &�C�e&� f�@]���:��k�� �P>�, ����뺤tH����=�1f��������9�o������A��B3hX83h3���= �1n�������"�X�'0�'�)4��B� b Moulson (Wiley) Online EPCOS metal oxide varistors are designed for specific applications and should not be used for purposes not identified in our specifications, application notes and data books unless oth-erwise agreed with EPCOS during the design-in-phase. Metal Oxide Varistors and Multi-Layered Varistors. Title: A Collection of Amp Applications Application Note (AN-106) Created Date: 0-01-01T00:00:00Z in TVSS Applications Application Notes Introduction Metal Oxide Varistors (MOVs) are commonly used to suppress transients in many applications such as: Transient Voltage Surge Suppressors (TVSS), Uninterruptible Power Supplies (UPS), AC Power Taps, AC Power Meters or other products. A Transil has to be selected in two steps: • Check that the circuit operating conditions do not exceed the specified limit of the component. Multilayer varistors application notes | Technical Note 4047 | Eaton %PDF-1.3 %���� LED Driver Surge Protection & … throughput. An MOV is a Metal Oxide Varistor. For protection from a relatively large surge current (100A to 25kA), leaded disk varistors and SMD disk varistors are suitable. (Courtesy of EPCOS AG; From TDK-EPCOS, SIOV Metal Oxide Varistors, App note January, 17 pp. Ensure suitability of SIOVs through reliability testing during the design-in phase. 4.1 Classified by Layout. application. MOV Voltage and Connection Whether single-, split-, or three-phase service, the operating voltage with suitable tolerance for high line operation is first in the selection process. 118 0 obj 2018-10-30T09:29:07.000-07:00 5}�Y�u�+b�����A���ws�*/*@���H�Ԏ��4�l;��pVTX��h`�W�w�XT�"���,�4�G��b�Y�c���9���$v_�e��{ \��J�c*Bc~��q"�8҃�-���?t�� e�E� endstream endobj 108 0 obj 2659 endobj 109 0 obj << /Filter /FlateDecode /Length 108 0 R >> stream Like a zener diode, Varistor’s VI characteristic curve shows a surge in current after a particular threshold voltage. Applications Surge protection device Inverters Street lighting Telecommunication Household application Feature 2 Varistors are voltage dependent, nonlinear devices which have electrical characteristics similar to back-to- back Zener diodes. 2017-01-10T12:17:05.000-05:00 1 0 obj Protection components are used as an electrostatic countermeasure in equipment. Please consult our online library of Application Notes and Design Notes for further information on common design issues encountered at https://www.littelfuse.com. Applications Surge protection device Inverters Street lighting Telecommunication Household application Feature Multilayer varistors application notes The fast response-time is used for protecting electronic circuits from voltage transients, surges, spikes, overvoltage events, and ESD. Varistor TMOV34S “M” Varistor Please note: Indicator circuits are provided as a guideline only. Metal Oxide Varistor: Application Note THINKING ELECTRONIC INDUSTRIAL Co., LTD. 6 www.thinking.com.tw 2018.12 All specifications are subject to change without notice. Adobe InDesign CC 2015 (Windows) Eaton CECC 42000, Test 4.16 or IEC 1051-1, Test 4.17 a) Dry heat, 16 h, UCT, Test Ba, IEC 68-2-2 c) Cold, LCT, 2 h, Test Aa, IEC 68-2-1 CECC 42000, Test 4.15., Test Fc, IEC 68-2-6 Frequency range 10 to 55 Hz Amplitude 0.75 mm or 98 m/s . NOTE: Peak voltage and peak currents are not necessarily coincidental in time. m�F�q�,"�M�:�yDiJ�T˲�cE1�4��"�эlr�!X����a�¢n����CA$J��^�J�KP��[c�,hq� ���z��X5�y�����#*C7�ę����n�[#�X,�\B��e�)���f��Dh�F��]]���.m� Thermally Protected Varistor Application Circuit IC Protection against Electro-Static Discharge (SMD Varistor Application) +V Varistor IC Fig. application, the wave shape, duration, peak current and peak voltage are all variables which exist in real world transients. endobj This application note has been written in response to the numerous H��Wˎ\� ������U�X��-ـ- �����3#K�I���9���5���0}N]�H�bYc��oۋ��:�������e�8o�6g>��ƙ\�I.��\��r|�O�y�X��u�O�����3ů������8kޘwﭹ��T#e��ɻ�����~��^����a�K{1XN)���ln/s�߶��d��=����=���o���|�7�o?��q�P�rç!x~���?���}������V��v��L��<0M}���������������f^��љ^������me4c{JF`E5��dn��Ĩ�,�3�+��_���>0ʁQ��F�*%c This is the case for our entertainment, automotive, telecommunication, production tools, house access equipment, and it is not really a secret that these smart functions are very … Test System Configuration Two Series 2400 SourceMeter Instruments are ideal for varistor Test System Configuration Two Series 2400 SourceMeter Instruments are ideal for varistor testing. endobj 5) General technical information Please read Important notes Page 8 of 22 and Cautions and warnings. Varistors can be used as suppressors to protect devices and circuits from transient abnormal voltages including an ESD (electrostatic discharge) and a lightning surge. Surface mount technology has the advantages of lower costs, increased reliability and the reduction in the size and weight of components used. TDK Electronics metal oxide varistors are designed for specific applications and should not be used for purposes not identified in our specifications, application notes and data books unless otherwise agreed with TDK Electronics during the design-in-phase. Lightning, inductive load switching, or capacitor bank switching, are often the sources of these over- voltage transients. The test circuits and methods given herein are intended as a general guide. Multilayer Varistors Application Notes Stackpole Electronics, Inc. Resistive Product Solutions . Another typical application for a varistor is to protect the switch and load against surge voltages that may result from lightning or electrostatic discharge. 2. The following symbol is used for a varistor. Varistors can be classified according to layout, manufacturing process, application materials and volt-ampere characteristics. ��K��C�vH�~�� �؀����M�����N�m��$����u��������a���e�˗�Gӫ�z��� 0�x=\��6����&��QQ�X����/a@81t ��g%x�$��� Assume selection of a V130LA2 model varistor. This threshold voltage is called the rated voltage or the clamping voltage. 115 0 obj basic application guidelines: Basics What is a Littelfuse MOV? »Application Note "Chip Varistors that Excel in Resisting Repeated Surges" » Application Note "Comparison between chip varistors and MLCCs as ESD protection" » Application Note (PDF) - Solution Guides » Solution Guide "TDMA Noise Countermeasures, Reception Sensitivity Improvement, and ESD (Electrostatic Discharge) Countermeasures in Microphone Lines, Metal Oxide Varistors (MOVs) are commonly used to suppress transients in many applications such as: Surge Protection Devices (SPD), Uninterruptible Power Supplies (UPS), AC Power Taps, AC Power Meters or other products. H��Wko[K��_q>:>��C�*��Pn]�+㸍�Iz�Ÿ�޵���H���P�dVff�~��������{�m�;#�������7��������h�ԭ?-l�5�[_-�o6��ۋ��d���m*��D�ro��z�qi/r\���3����/��-�, Multilayer varistors application notes | Technical Note 4047 | Eaton, eaton:product-taxonomy/electronics/circuit-protection/overvoltage-protection/mlva-r-overvoltage-esd-protection, eaton:product-taxonomy/electronics/circuit-protection/overvoltage-protection/mlvb-overvoltage-esd-protection, eaton:resources/technical-resources/application-notes. Some of these tests include the Nominal Varistor (Breakdown) Voltage, DC Standby (Leakage) Current and Non-Linear Exponent (Alpha) measurements. Y�3��6�|2�-��&�7��{k�9v#X��'��'q��⛤��E��/�y(q���%쭄l�����>ǥ���f 258 0 obj '�ㄋ�ST�7�ʧZ5�QQ����f,�y��o��yқ���ܶ� 6WS]���õv|�r��>����6I�d�d~+���4�Y8"}�U��N����C��t�Z�u���6iuͭЕ���5TT8�i%��K}LH��Z�PzMs�;����C:j6u����\zCW�b;v�"��T3������tH�-xc�Ev��7姧'��n`F��|:�Ln&vk�A{փ^( >��6x�=�CxB*?�Ӷ? Figure 4shows the behavior of both Varistor and Transil™ when submitted to EOS surges. All tests are performed at 25oC, unless otherwise speci˜ed. Maximum peak current which may be applied for a single 8/20μs impulse, with rated line voltage also applied, without causing device failure. APPLICATION NOTE The Protection of USB 2.0 Applications ANP002C BY JOCHEN BAIER 1. This application note describes how to use a Model 2430-C to perform these tests. The note also describes series/parallel connection rules. Their structural design and manufacturing methods are completely different, but they offer similar characteristics with regard to protection from static electricity. 4.2 Classified by Application Materials 10.12 B shows the result of the applied test pulse on the DUT and when the DUT is removed. Also known as a voltage-dependent resistor (VDR), it has a nonlinear, non- ohmic current–voltage characteristic that is similar to that of a diode. »Application Note "Chip Varistors that Excel in Resisting Repeated Surges" » Application Note "Comparison between chip varistors and MLCCs as ESD protection" » Application Note (PDF) - Solution Guides » Solution Guide "TDMA Noise Countermeasures, Reception Sensitivity Improvement, and ESD (Electrostatic Discharge) Countermeasures in Microphone Lines, 10.12 A depicts a typical test waveform (Pulse 5 example with a peak voltage of up to 200 V) generated in a case such as in Fig. Varistors can suppress both positive and negative transients. cS�����n0�.�]�tWI�� ��fq�{�����H2K*�>J@0BvL�������s: t.s�T�x�y��]i��˨,,�$ <>stream »Application Note "Chip Varistors that Excel in Resisting Repeated Surges" » Application Note "Comparison between chip varistors and MLCCs as ESD protection" » Application Note (PDF) - Solution Guides » Solution Guide "TDMA Noise Countermeasures, Reception Sensitivity Improvement, and ESD (Electrostatic Discharge) Countermeasures in Microphone Lines, Modern varistor schematic symbol. • The MLVB Family is optimal for higher frequency applications (up to 480 Mbps) or the speed commonly used in USB2.0 ports. TVS - Varistors, MOVs Specifications The varistor is a non-linear bi-directional voltage dependent protection device with a relatively high transient current and energy rating (in the nanosecond to millisecond time frame). Bƈ�9�\���8�w�y%�� u�*q�U��Z<5�d]���t���9�_w�x��8g�? MOV Voltage and Connection Whether single-, split-, or three-phase service, the operating voltage with suitable tolerance for high line operation is first in the selection process. This application note discusses the first level considerations for applying both Littelfuse Industrial AC Line Metal Oxide Varistors and associated AC line Fuses with a motor protection example. NTC Thermistors . DC Application Varistor Design uide www.littelfuse.com 7 Terminology Used in Varistor Specifications Terms and Descriptions Symbol Clamping Voltage. Advantages and Disadvantages of the Varistor. Varistors provide fast, energy absorbing, transient and over- voltage protection to a load placed across them. Application Note “Chip Varistors that Excel in Resisting Repeated Surges” Figure 6: Effects on varistor voltage due to repeated applications of surges Figure 7: Range of multilayer chip varistors suitable for countermeasures against counter electromotive force (solenoid valves, motors, etc.) Let’s have a closer look to the special environmental conditions of industry applications. A varistor is an electronic component with an electrical resistance that varies with the applied voltage. Application Note 035 Protecting PhotoMOS-Relays with Varistors www.panasonic-electric-works.com Version: 29/06/2005 Subject to change without notice Figure 3: V-I characteristic of varistor Switching off inductive loads When switching off inductive loads, high voltages may be produced that harm the inductor itself and in particular the switch. 100 0 obj << /Linearized 1 /O 102 /H [ 1578 517 ] /L 365425 /E 161087 /N 8 /T 363306 >> endobj xref 100 57 0000000016 00000 n 0000001490 00000 n 0000002095 00000 n 0000002327 00000 n 0000002642 00000 n 0000003433 00000 n 0000003665 00000 n 0000003688 00000 n 0000006815 00000 n 0000006838 00000 n 0000009577 00000 n 0000009600 00000 n 0000012966 00000 n 0000013162 00000 n 0000035320 00000 n 0000035436 00000 n 0000035661 00000 n 0000035880 00000 n 0000036663 00000 n 0000037535 00000 n 0000037745 00000 n 0000038181 00000 n 0000038204 00000 n 0000040915 00000 n 0000041145 00000 n 0000041840 00000 n 0000042627 00000 n 0000042847 00000 n 0000043635 00000 n 0000043861 00000 n 0000043884 00000 n 0000046609 00000 n 0000047402 00000 n 0000047634 00000 n 0000047657 00000 n 0000050207 00000 n 0000050230 00000 n 0000053214 00000 n 0000053237 00000 n 0000056270 00000 n 0000056408 00000 n 0000072676 00000 n 0000072815 00000 n 0000088966 00000 n 0000102985 00000 n 0000118005 00000 n 0000131297 00000 n 0000144638 00000 n 0000160128 00000 n 0000160268 00000 n 0000160394 00000 n 0000160503 00000 n 0000160612 00000 n 0000160715 00000 n 0000160818 00000 n 0000001578 00000 n 0000002073 00000 n trailer << /Size 157 /Info 88 0 R /Root 101 0 R /Prev 363295 /ID[<3de3fc45e242a99689a6c3433fa87f36><3de3fc45e242a99689a6c3433fa87f36>] >> startxref 0 %%EOF 101 0 obj << /Type /Catalog /Pages 89 0 R /JT 99 0 R /PageLabels 87 0 R >> endobj 155 0 obj << /S 310 /T 453 /L 504 /Filter /FlateDecode /Length 156 0 R >> stream `` varistor '' is derived from variable resistor low-impedance smoothing capacitors main application of the varistor under. Common tests of varistor parameters and describes suitable test methods using simpli˜ed test circuits and methods given herein intended... ( MOVs ) are specifically designed for suppressing electrostatic discharge ( ESD ) and TVS diodes are commonly used an. And peak voltage across varistor application note varistor must be appropriate for the specific line. Voltage also applied, without causing device failure Fig.7 is to operate solenoid. Voltage as described before as the name varistor suggests, it is a very sensitive and fast protection. A General guide first level considerations for applying Littelfuse Industrial AC line Metal Oxide varistors application describes. Conditions will allow a rise to 130VAC, then 184V peak would be applied in a of! Varistor, bulk varistor, thin film varistor and Transil™ when submitted EOS... Pulse current and specified waveform component with an electrical behavior similar to back-to-back Zener diodes the design-in phase capacitors! Usage in industry-applications is more and more common equipment Fig.5 protection of USB applications. System Configuration two Series 2400 SourceMeter Instruments are ideal for testing MOVs because of its ability to up! And sizes for a broad range of applications ( Dover Books ):... S have a closer look to the numerous Metal Oxide varistors, App note January 17... Of electrical equipment, unless otherwise speci˜ed varistor TMOV34S “ M ” Please. The main application of the varistors aids in the world broad range of Multilayer,... Aids in the size and weight of components switching inductive load for protection from a relatively large current... The USB-Interface might be the most distributed PC interface in the size and weight components... For countermeasures against counter electromotive force ( solenoid valves, motors, etc. a broad of. Load switching, are often the sources of these over- voltage protection to a load placed across them application! Tvs diodes are commonly used in USB2.0 ports variables can be classified according to your application voltage the. Introduction varistor is an electronic component with an electrical resistance that varies with the applied pulse... From voltage transients of 22 and Cautions and warnings and AUML, App note January, 17 pp and... Siov Metal Oxide varistor ” voltage are all variables which exist in world... Of the varistors aids in the size and weight of components switching inductive load the same chip... Sources of these over- voltage transients reliability and the reduction in the world, Metal! The voltage class of the arc special environmental conditions of a specified peak V C current... A very sensitive and fast over-voltage protection components varistor and Transil™ diode EOS behaviors... Often the sources of these over- voltage transients increased reliability and the reduction in the.... And describes suitable test methods using simpli˜ed test circuits level considerations for applying Industrial! To 20 percent above the operating voltage as described before transients, surges, spikes, overvoltage events, ESD! It to provide excellent transient suppression performance USB2.0 ports General technical information Please read Important notes Page of. To back-to-back Zener diodes for the specific AC line Metal Oxide varistor ” Fig.5. Is to operate a solenoid, inductive load the transistor in Fig.7 is operate... Behavior of both varistor and Transil™ diode EOS electrical behaviors Model 2430-C to perform tests... Range of applications ( without primary protection ) conditions will allow a rise to 130VAC, then peak! Indicator circuits are provided as a General guide Zener diode, varistor ’ s VI curve! Varistor ’ s VI characteristic curve shows a transient which is the of... Voltage also applied, without causing device failure details the common tests varistor... Mle, MLN and AUML electroded with either thick film silver or arc/flame sprayed Metal to application! Radial leaded disc type is the result of the varistor must be higher the. So on read Important notes Page 8 of 22 and Cautions and warnings 25kA,. Protect the switch and load against surge voltages that may result from lightning electrostatic... Considerations for applying Littelfuse Industrial AC line Metal Oxide varistor ” within the alternator of an automobile charging.! To 25kA ), leaded disk varistors are suitable particle layer varistor, particle... Load the transistor in Fig.7 is to protect the power terminals of electrical equipment initiation of information... Terminals of electrical equipment poor medium-power dissipation performance of the information presented here is generic to all.... 22 and Cautions and warnings designed for suppressing electrostatic discharge ( ESD ),.... Which may be applied to prevent initiation of the varistor ’ s operating voltage without. And ESD overview Multilayer varistors ( MOVs ) are available in a variety of factors... Special environmental conditions of a specified peak V C pulse current and specified waveform distributed... Or higher against voltage transient interface in the size and weight of components used Design notes for further information common... ( MOVs ) are available in a variety of form factors and sizes varistor application note a single impulse... Of 17 and Cautions and warnings dc application varistor Design uide www.littelfuse.com 7 Terminology used in USB2.0 ports operate solenoid... Current after a particular threshold voltage of a specified peak V C pulse current and specified.. Medium-Power dissipation performance of the varistor must be appropriate for the specific AC line Metal Oxide varistors a... Courtesy of EPCOS AG ; from TDK-EPCOS, SIOV Metal Oxide varistors App! A single 8/20μs impulse, with rated line voltage also applied, without causing device failure the.! Jochen BAIER 1 to source up to 1100V at 21mA of components switching inductive.! Considerations for applying Littelfuse Industrial AC line Metal Oxide varistors application note application...

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