Passive Components Blog
No Result
View All Result
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Samsung Releases Automotive Molded 2220 1kV C0G MLCC

    How to Select Ferrite Bead for Filtering in Buck Boost Converter

    VINATech Offers Smallest 100µF Al-Hybrid Capacitor

    Vishay Unveils SMD 1200V PTC Thermistors in Compact Size

    Power Inductors Future: Minimal Losses and Compact Designs

    Bourns Unveils Automotive 3 Watt Gate Driver Transformer

    Murata Opens EMC Test Lab in Nuremberg to Enhance Automotive Support

    Percolation Phenomenon: Degradation of Molded Power Inductors in DC/DC Converters

    Molex Acquires Smiths Interconnect

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    How to Select Ferrite Bead for Filtering in Buck Boost Converter

    Power Inductors Future: Minimal Losses and Compact Designs

    Percolation Phenomenon: Degradation of Molded Power Inductors in DC/DC Converters

    Connector PCB Design Challenges

    Efficient Power Converters: Duty Cycle vs Conduction Losses

    Ripple Steering in Coupled Inductors: SEPIC Case

    SEPIC Converter with Coupled and Uncoupled Inductors

    Coupled Inductors in SEPIC versus Flyback Converters

    Non-Linear MLCC Class II Capacitor Measurements Challenges

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • PCNS
    • PCNS 2025
    • PCNS 2023
    • PCNS 2021
    • PCNS 2019
    • PCNS 2017
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Samsung Releases Automotive Molded 2220 1kV C0G MLCC

    How to Select Ferrite Bead for Filtering in Buck Boost Converter

    VINATech Offers Smallest 100µF Al-Hybrid Capacitor

    Vishay Unveils SMD 1200V PTC Thermistors in Compact Size

    Power Inductors Future: Minimal Losses and Compact Designs

    Bourns Unveils Automotive 3 Watt Gate Driver Transformer

    Murata Opens EMC Test Lab in Nuremberg to Enhance Automotive Support

    Percolation Phenomenon: Degradation of Molded Power Inductors in DC/DC Converters

    Molex Acquires Smiths Interconnect

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    How to Select Ferrite Bead for Filtering in Buck Boost Converter

    Power Inductors Future: Minimal Losses and Compact Designs

    Percolation Phenomenon: Degradation of Molded Power Inductors in DC/DC Converters

    Connector PCB Design Challenges

    Efficient Power Converters: Duty Cycle vs Conduction Losses

    Ripple Steering in Coupled Inductors: SEPIC Case

    SEPIC Converter with Coupled and Uncoupled Inductors

    Coupled Inductors in SEPIC versus Flyback Converters

    Non-Linear MLCC Class II Capacitor Measurements Challenges

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • PCNS
    • PCNS 2025
    • PCNS 2023
    • PCNS 2021
    • PCNS 2019
    • PCNS 2017
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

Clarifying MIL-STD-461 and EMI Filter Misconceptions

8.1.2020
Reading Time: 3 mins read
A A

Some filter manufacturers may quote MIL-STD-461 in their literature, however this equipment specification that can’t be applied directly to filters. Knowles Precision Devices blog provides clarity on the standard clears up some common misconceptions.

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.

RelatedPosts

Samsung Releases Automotive Molded 2220 1kV C0G MLCC

How to Select Ferrite Bead for Filtering in Buck Boost Converter

VINATech Offers Smallest 100µF Al-Hybrid Capacitor

For background, a piece of electrical equipment behaves as a “source” that generates EMI; EMI, transmitted by conduction and radiation, could be incident upon a receiver (for instance, another piece of electrical equipment or a test fixture). The level of the electromagnetic signature for the conducted emissions is determined by the characteristics of the receiver. For example, a switched-mode power supply (SMPS) may be “noisy” and filament lights may be “quiet.”

If emissions from the equipment exceed the limits set by MIL-STD-461, then they need to be attenuated using an EMI filter. In order to meet requirements, the filter must suppress emissions to a low enough level for the equipment to claim compliance across the frequency spectrum.

The electromagnetic signature of the equipment determines the EMI filter performance requirements, and the filter manufacturer can only get that information from the equipment manufacturer. From there, the claim for compliance can normally be verified by test and measurement. That said, no filter manufacturer can claim that their filters “meet” MIL-STD-461. MIL-STD-461 is an equipment specification that cannot be applied directly to filters.

All filter manufacturers catalogue their filter performance as insertion loss in a reference impedance system (typically 50Ω). The filter manufacturer does not know the level of emissions associated with a specific piece of equipment, nor the real-world terminating impedances as presented to the filter. The published filter insertion loss performance at, or across, a particular frequency range will not necessarily represent the equivalent attenuation of equipment emissions in practice. The equipment manufacturer will need to conduct their own tests to determine whether the part is suitable and the filtered equipment meets the requirements of MIL-STD-461.

A situation might arise where the proposed filter is “above specification” requirement, and the equipment easily conforms to MIL-STD-461. In contrast, equipment may be so electromagnetically noisy that a proposed filter would automatically fail to support the equipment in meeting MIL-STD-461 specifications. There is no guarantee that incorporating a particular filter into a piece of equipment will enable it to comply with MIL-STD-461 emissions limits.

Some filter manufacturers may quote MIL-STD-461 in their literature; however, no filter supplier can properly quote it. At Knowles Precision Devices, if we receive a filter inquiry that refers to MIL-STD-461, we ask exactly what level of attenuation you require. We can suggest part numbers based on that detail, but ultimately you will need to test parts to determine if they are suitable.

featured image source: Knowles Precision Devices

Related

Source: Knowles Precision Devices

Recent Posts

How to Select Ferrite Bead for Filtering in Buck Boost Converter

23.10.2025
26

Power Inductors Future: Minimal Losses and Compact Designs

22.10.2025
30

Percolation Phenomenon: Degradation of Molded Power Inductors in DC/DC Converters

21.10.2025
31

September 2025 ECIA US Components Sales Sentiment Continues in Optimism

20.10.2025
19

High Energy Density Polymer Film Capacitors via Molecular and Interfacial Design

15.10.2025
26

Over-Voltage Protection Clippers, Clampers, Snubbers, DC Restorers

13.10.2025
33

Silicon Capacitors Market: Shaping the Foundation for Next-Gen Miniaturization Electronics

10.10.2025
79

Enhancing Energy Density in Nanocomposite Dielectric Capacitors

9.10.2025
41

Advances in the Environmental Performance of Polymer Capacitors

8.10.2025
68

Vishay Releases DLA Tantalum Polymer Capacitors for Military and Aerospace

8.10.2025
38

Upcoming Events

Oct 28
8:00 - 15:00 CET

Power Up Your Design: SN6507 and the Ready-to-Use Development Kit

Oct 30
11:00 - 12:00 CET

Space Ceramic Capacitors with Flexible Testing

Nov 4
10:00 - 11:00 PST

Design and Stability Analysis of GaN Power Amplifiers using Advanced Simulation Tools

View Calendar

Popular Posts

  • Buck Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Boost Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Flyback Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • LLC Resonant Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Ripple Current and its Effects on the Performance of Capacitors

    3 shares
    Share 3 Tweet 0
  • What is a Dielectric Constant and DF of Plastic Materials?

    4 shares
    Share 4 Tweet 0
  • SEPIC Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Dual Active Bridge (DAB) Topology

    0 shares
    Share 0 Tweet 0
  • MLCC and Ceramic Capacitors

    0 shares
    Share 0 Tweet 0
  • Flying Capacitors

    0 shares
    Share 0 Tweet 0

Newsletter Subscription

 

Passive Components Blog

© EPCI - Leading Passive Components Educational and Information Site

  • Home
  • Privacy Policy
  • EPCI Membership & Advertisement
  • About

No Result
View All Result
  • Home
  • Knowledge Blog
  • PCNS

© EPCI - Leading Passive Components Educational and Information Site

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.
Go to mobile version