Varistors are voltage-dependent ceramic resistors (VDRs) that reliably protect electronic systems against overvoltages by limiting surge voltages or currents and by absorbing the energy.
The Epcos SIOV metal oxide varistors have proved themselves as general-purpose elements for ensuring immunity (to EN 50082) from:
* Electrostatic discharge (ESD) to IEC 1000-4-2.
* Bursts (fast transients) to IEC 1000-4-2.
* Surge voltages (high-energy transients) to IEC 1000-4-5.
They satisfy requirements for electromagnetic compatibility (EMC), as demanded for CE conformity in Europe, says Epcos. The manufacturer supplies SIOVs in leaded style (some models with integrated overload protection), as SMDs (encapsulated monoliths and multilayer technology), plus block, strap and power modules for heavy-duty applications. Suitable models are also available for medium voltage arresters in power distribution networks.
Some major additions and improvements are:
* Large selection of surface-mount varistors in multilayer technology with boosted surge current ratings (up to 1200 A).
* Special SMDs with controlled capacitance to substitute blocking capacitors (50 pF to 30 nF).
* Multilayer varistors in size 0603 (4 to 14 V).
* Disk varistors with integrated thermo fuse (TFVs).
* Arrester blocks, rated at 3 and 6 kV, for medium-voltage arresters.
Clearing the Static: Conductive foot, heel and shoe grounders Actum Electronics
Circuit & System Protection
Conductive foot, heel and shoe grounders are used in electrostatic discharge protected areas to provide a path to ground for static electricity.
Read more...LED driver for industrial power supply indication Altron Arrow
Editor's Choice Circuit & System Protection
A simple and small solution for driving an LED to provide visual feedback in the presence/absence of a system’s power using a chip not originally designed for this purpose.
Read more...HiRel components from Kyocera AVX Electrocomp
Passive Components
Kyocera AVX Corporation is a leading supplier of advanced components and interconnect solutions, offering a broad selection of passive components and connectors.
Read more...Clearing the Static: Cleaning in an ESD-protected area Actum Electronics
Circuit & System Protection
Cleaning in a protected electrostatic discharge area is a critical task to maintain the integrity of sensitive electronic components and prevent damage caused by static electricity.
Read more...Ensuring safety with earth leakage protection NewElec Pretoria
Circuit & System Protection
Earth leakage protection helps mitigate the risks of electric shocks, fires, and equipment damage by swiftly identifying faults and disconnecting the power supply, thus safeguarding both human lives and machinery.
Read more...Suppressing EMI with filters Vepac Electronics
Circuit & System Protection
EMI/RFI filters play an important role in reducing the high-frequency noise that is generated by various electrical and electronic devices.
Read more...Patch attenuates like a shielding cabinet Würth Elektronik eiSos
Circuit & System Protection
Würth Elektronik has launched its hybrid WE-EMIP EMI absorber sheet, a convenient solution for reducing electromagnetic interference by up to 40 dB.
Read more...Clearing the Static: Ionisation equipment Actum Electronics
Circuit & System Protection
Electrostatic discharge (ESD) ionisation equipment is designed to neutralise static charges that accumulate on surfaces in environments where ESD-sensitive components or materials are handled. These ...
printer friendly version