EPCOS (TDK) Solutions for Circuit Protection

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Circuit protection solutions from EPCOS (TDK) – a worldwide leader in circuit protection devices

TDK Corporation is a worldwide leader in circuit protection devices providing a comprehensive portfolio of EPCOS products including multilayer varistors, metal oxide varistors, inrush current limiters, gas-filled surge arresters (GDT), and PTC & NTC thermistors.  These components are essential in systems requiring high-performance ESD, over-voltage, over-current, and over-temperature protection if they are to live up to their potential in terms of lifetime, low maintenance costs and overall reliability.  EPCOS protection devices provide effective and cost-efficient solutions for many markets including automotive, industrial, lighting, security, energy, healthcare, telecommunication and consumer. Trust EPCOS brand circuit protection components for all your application designs!

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MLV | ICL | Surge Arrestors | PTC Thermistors | NTC Thermistors

Metal Oxide Varistors (MOV)

B722 MOVs

Metal Oxide VaristorsEPCOS MOVs are primarily designed for use in AC Line Voltage applications requiring protection from surge and overvoltage conditions. EPCOS offers a broad portfolio of styles including: Leaded and SMD Disk varistors, Block varistors, and Strap varistors to cover a wide range of applications.

Applications

  • Power Supply
  • Drives
  • Inverters
  • Large Appliance
  • Compressor
  • Metering
  • LED Lighting
  • UPS
  • Photovoltaic
  • Basestation
  • Automotive: Engine control, HVAC, small motors
  • Renewable Energy
  • Telecom Line – Line/Line – Ground protection
 

MultiLayer Varistors (MLV)Multilayer Varistors

B725 MLV | B726 Varistor

EPCOS brand Multilayer varistors are voltage-dependent resistors which protect susceptible circuitry from transient overvoltage by forming a low-resistance shunt when voltage increases above the threshold value. Multilayer varistors are ceramic based transient voltage suppressors. Main use: ESD and other transient protection

 

Features and Benefits

  • Bi-directional protection
  • High energy/current handling capability
  • ESD per IEC 61000-4-2 level 4
  • Sub 1ns response time
  • RoHS compliant
  • No derating up to 125°C standard series
  • High Speed, Controlled Capacitance, Radio Frequency, Telecom, Ceradiode and Automotive Series also available.

Applications

  • Telecom
    • Mobile phone (audio lines, display, camera, antenna, data line, pushbutton, etc.), base station, DECT
  • Industrial
    • Electro motor, drives, computers, controllers
  • Automotive
    • Safety, infotainment, comfort & convenience, body control, drive train
  • Consumer
    • TV, DVD/Bluray, set-top box, notebook, printer, MP3 player, tuner, interfaces such as audio, video, USB, Ethernet, HDMI, SATA, push button
 

Inrush Current LimitersInrush Current Limiters (ICL)

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The thermal properties of a Power NTC can be used to limit harmful switch-on currents of capacitive loads. EPCOS Inrush Current Limiters are safe and reliable protection for capacitive loads in switching circuits and for soft starting of inductive loads.

Features and Benefits

  • Rated resistance (25°C) 1 to 80 Ω
  • Max. permissible current 1.3 to 20.0 A
  • No current derating between 0 - 65°C
  • UL approval (E69802)
  • Various lead-forms available
    • Straight (Catalog Standard)
    • Inside kink
    • Outside kink

Applications

  • Switched Mode Power Supplies (SMPS), 
  • Soft Starting of Electric Motors
  • Fluorescent Lighting Ballasts
  • Transformers
  • Set Top Box
  • Power Supplies
  • DC Bus Capacitor Charging Banks
  • Control Boards for White Goods 
  • Inverter – Motor Drives
  • Consumer Electronics
 

Surge ArrestorsSurge Arrestors

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Surge Arresters also known as Gas Discharge Tubes or Surge Voltage Protectors (SVPs), are hermetically sealed ceramic tubes consisting of two or three electrodes (one or two chambers) spaced by insulators and filled with a rare gas. EPCOS brand GDT cover a wide spectrum of protection and switching applications - from light to maximum duty, from standard devices to the most customized products. EPCOS is able to find the best match for the most diverse requirements

Features and Benefits

  • Reliable voltage limitation
  • High current discharge capability
  • Low self capacitance
  • High insulation resistance (GOhm)

 

Design Tool

  • PSpice Module

Applications

  • LED Lighting – outdoor applications
  • Phone line protection
  • WiMax
  • Cable Modems
  • Set top boxes
  • Central office equipment
  • Subscriber / Station protection
  • Outside plant
  • Coax
  • CATV applications
  • Switching applications - HID, igniters
  • Security and alarm
  • Cellular base stations
  • Remote gate openers
  • Power supplies
  • Ballasts
  • TVSS modules
 

PTC ThermistorsPositive Temperature Coefficient (PTC) Thermistors

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PTC (Positive Temperature Coefficient) thermistors are thermally sensitive semiconductor resistors which show an increase in resistance as temperature increases. PTC thermistors can act as “resettable fuses”. EPCOS brand offers a wide variety of PTC thermistors products for overcurrent protection, temperature limiting protection, and heater applications.

Features and Benefits

  • Case sizes EIA 0402 ... 1206
  • Excellent lifetime performance and aging stability up to 150 °C operating temperature
  • AEC-Q200 qualification 
  • Broad portfolio of R- and B-values
  • High accuracy temperature sensing and thermal compensation

Applications

  • LED Lighting
  • Transformers
  • Power Supplies
  • Fans
  • Multimeters
  • DC-DC Converter
  • Heating
  • Compressors
  • Telecom
 

Negative Temperature Coefficent (NTC) ThermistorsNegative Temperature Coefficient (NTC) Thermistors

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NTC (Negative Temperature Coefficient) thermistors are thermally sensitive semiconductor resistors which show a decrease in resistance as temperature increases. EPCOS brand NTC thermistors are simple, but very sensitive and accurate sensing elements for measuring and control temperature in circuits.

Features and Benefits

  • Case sizes EIA 0402 ... 1206
  • Excellent lifetime performance and aging stability up to 150 °C operating temperature
  • AEC-Q200 qualification 
  • Broad portfolio of R- and B-values
  • High accuracy temperature sensing and thermal compensation

Applications

  • LED Lighting
  • Rechargable batteries
  • Hard disk drives (e.g. in DVD recorders, laptops)
  • RF modules and TCXO
  • Power amplifiers
  • Fan micro controller
  • Automotive: tire pressure monitor, motor management, airbag, LED lighting, gear box control, temperature control for the battery pack in
    conventional, hybrid electric and full-electric vehicles, sensor system, display.
 

Video

 

Resources: Tools & Support

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EPCOS (TDK)

Application guide

LED Lighting

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EPCOS (TDK)

Product brief

ThermoFuse Varistors, T Series

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EPCOS (TDK)

Application guide

Solutions for Circuit Protection