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Varistors
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Catalog excerpts

Varistors - 3

Intro Information 4Varistors 6 Selector Chart 6Product Datasheets 8 General Product Information 31 Product Standard / Definitions / CE-Marking / Conformity 32National approvals 32Varistors 33 Type Index 39Index by Order Numbers 38 >

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Varistors - 5

S CHURTER is a pro g ressive innovator and manufacturer of fuses, co nnectors, circuit breakers, input systems, EM C products and manufacturing services for the electronics indust r r y. We focus on components that ensure safe suppl y of power and make the interface between human and m a a chine easier . fuses s n on r e e settable fuses t elec o o m f use s r ese t tab t l e f uses f useholders blocks & clips older s f useh conn ec t ors p ow e e r entr y modules without line fi lter p ow e e r entr y modules with line filte r a pplia a nce cou pl ers cord c c onnectors (rewireable ) dis...

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Varistors - 7

With the development, production and sales of active and passive components for electronic and electromechanical applications SCHURTER is a leading global industry partner. The SCHURTER Group leads the way in its four strategic business areas, using its innovative strength and cutting- edge technology to provide customers with intelligent practical solutions. Radial leaded varistors (MOV) supports equipment manufacturers to pass the Surge Test Condition according to IEC 61000-4-5. Fuses 7 www.schurter.com >

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Varistors - 30

> > Best Products Worldwide "Both, now and in the future, our customers are guaranteed the best products world-wide; pro-ducts which perfectly correspond to their individual needs. SCHURTER is permanently committed to the excellent quality of its products and business practices which are ecologically sound." Hans-Rudolf Schurter, Schurter Holding AG > > Process improvement with SIX SIGMA We deploy SIX SIGMA's systematic problem-solving method DMAIC to improve our processes. At the same time, this involves eliminating waist of any kind consequently. > > Intensive Customer Interaction So what...

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Varistors - 31

Product Standard / Definitions / CE-Marking / Conformity 32National approvals 32Varistors 33 31 www.schurter.com >

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Varistors - 32

(Mark) European Norms Electrical Certification (Mark) VDE Verband Deutscher Elektrotechniker > (Certificate of conformity with factory surveillance) UMF Universal Modular Fuse meets the standard IEC 60127-4 > (Recognition) UL Underwriters Laboratories (USA, Canada) (Listing) UL Underwriters Laboratories (USA, Canada) (Recognition) UL Underwriters Laboratories (USA) > (Listing) UL Underwriters Laboratories (USA, Canada) > CSA Canadian Standard Association, Component Acceptance Service > CSA Canadian Standard Association CCC China Compulsory Certification PSE Japan Electrical Safety &...

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Varistors - 33

Introduction Varistors (Variable Resistors) are voltage-dependent, nonlinear resi-stors with a symmetrical current-voltage characteristic curve (Figure 1) where the impedance decreases when the voltage decreases. Va- ristors are often also referred to as MOV (Metal Oxide Varistors), ZnO (Zinc Oxide Varistors), VDR (Voltage Dependent Resistors) and TVSS (Transient Voltage Surge Suppressors). > U 1000 600 200-200-600 -1000-40 -2020 40I Figure 3: Current flow during normal operation (high impedance) > Surge Figure 1: Voltage/current curve, green: Normal operation, yellow: Con-ductive in the...

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Varistors - 35

Approvals > Fuse Fuse Fuse The following component standards apply to zinc oxide varistors: > UL 1449Transient Voltage Surge Suppressors UL 1414Across-the-Line Components 3 CSA C22.2Accessories and Parts for Electronic Equipment Figure 11: AC 3-phase circuit > FuseFuseFuseDevice to protect VaristorVaristor ThermalFuse Varistor Typical Application Circuit Diagrams > Varistor Figure 12: AC 3-phase circuit with thermal fuse > F use Device to protect Varistor Varistor Thermal Fuse Figure 13: Data lines > Figure 10: AC or DC circuit with thermal fuse Figure 14: Switch-off protection >

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Varistors - 36

Figure 15: Switch protection (arc suppression) Figure 18: Standard Waveform (8/20 ˩ s) according to IEC 60060 Selection Procedure Step 1: Establishing the varistors voltageThe lowest varistor voltage depends on the highest AC or DC voltage applied. Usually, the tolerance range is assumed to be between +/- 10 and 20%, by which the voltage supply may fluctuate. The following varistor voltages are commonly used:- 24 VDC secondary voltage Recommended varistor voltage: 26 VDC (AVTS, 0070.20xx.xx) 31 VDC (AVTS, 0070.25xx.xx) 38 VDC (AVTS, 0070.30xx.xx)- 120 VAC line voltage (USA Recommended...

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Varistors - 37

Step 2: Establishing the maximum permissible peak current Step 3: Establishing energy absorption Step 4: Establishing power dissipation Step 5: Testing the protective performance in practice All important information regarding steps 2 to 4 can be found in the sec-tion on ParametersӔ. >

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Varistors - 38

AVTP Varistors 15 AVTS Varistors 8 AVTT Varistors 23 >

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S witzerland Ja p an G ermany SC H U RTER A G SC H U RTER K. K . SC H U RTER G mbH Tel: ++41 +41 369 31 1 1 Te l: ++ 8 1 + 3 5 4 65 2 06 2 T el: ++49 +7642 682 c ontact @ schurter.ch info@schurter.co. jp info @ schurter.de B rasil S witzerlan d SC H U RTER + O KW do Brasil S in g apor e M EIERH O FER A G C omponentes Eletronicos Ltd a SC HURTER (S) Pte. Ltd. ( APA C H Q s ) T el: ++41 +56 481 90 0 Tel.: ++55 +11 5041 31 4 1 T e l : ++65 6291 2111 info @ meierhofer.c h info @ sob-brasil.com info @ schurter.com.sg C hina S l o v a ki a SC H U RTER Electronics S henzhen Ltd. SC HURTER (S K )...

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