Clarifying MIL-STD-461 and EMI Filter Misconceptions

  • Posted by doEEEt Media Group
  • On March 19, 2020
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The US MIL-STD-461 specification manages electromagnetic interference emissions by setting limits on the levels that can be emitted from electrical equipment. This specification also sets regulation to control equipment susceptibility to external noise sources and establishes guidelines for properly measuring the relevant equipment features.

EMI Suppression Shields: Understanding the Basics

  • Posted by doEEEt Media Group
  • On March 18, 2020
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Magnetic sheets come in metal powder-, ferrite-, polymer- and metallized-based materials with each supplier’s material being unique. Each supplier can also feature data of their materials’ strengths and target applications in a variety of ways, thus leaving the intended user, at times, with many questions.

Modular AC line EMI filters explained

  • Posted by doEEEt Media Group
  • On March 16, 2020
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The equipment typically includes an embedded AC-DC converter, or power supply, which might also be chassis-mount or sometimes rack- or PCB-mounted. In each case, the power supply will invariably meet the statutory requirements for emissions as a stand-alone part, typically EN55011/EN55032 for conducted and radiated interference. But additional filtering may still be necessary.

How to Suppress Triacs EMI and RFI Noise

  • Posted by doEEEt Media Group
  • On March 16, 2020
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Noise is generated in all semiconductor devices including triacs. Triacs are used in such power-switching applications as inverter- or motor-control circuits. Triacs and thyristors (silicon-controlled rectifiers, or SCRs) are used in power-switching applications because these can handle high voltages and currents.

Different options for Panel C Mounted EMI Filters

  • Posted by Manuel Sánchez Ruiz
  • On February 21, 2020
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It is common knowledge that leads time is often a critical aspect of Procurement of EEE parts for Space Applications. Some specific family types usually suffer from having long lead times (more than 1 year on some occasions), which makes them a major driver on any procurement. One of the most affected families are Space Qualified Panel C Mounted EMI filters.

Insertion Loss and Performance in EMI Filtering

  • Posted by doEEEt Media Group
  • On January 29, 2020
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The insertion loss performance shows signal attenuation at any given frequency. As a metric, the insertion loss performance is most useful as a guide in the filter selection process; the actual performance in service can vary depending on circuit characteristics.

SMD Power Inductors

  • Posted by doEEEt Media Group
  • On January 2, 2020
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There are a multitude of SMD Power Inductors construction types available for the different types of application: Magnetically shielded and Unshielded
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