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EMI/EMC Testing for Electronics: Complete Guide

Ensuring electronics don't interfere or get interfered with.
23 September 2026 by
EMI/EMC Testing for Electronics: Complete Guide
Gaurav Kumar
Other Licenses & RegistrationsComplete Guide3 min read
The short answer

EMI/EMC testing checks that electronic products do not emit excessive electromagnetic interference and can withstand interference from their environment. It is required for many markets and certifications, including CE marking in the EU, FCC in the US, and in India for telecom (MTCTE), defence and certain BIS or sector requirements. Testing is done at accredited labs.

TestsEmissions and immunity
MarketsIndia, EU, US
LabsAccredited EMC labs

Test types

  • Radiated and conducted emissions
  • ESD immunity
  • Radiated immunity
  • Surge and fast transients

When required

  • CE and FCC certification
  • Telecom equipment certification
  • Defence and railway procurements
  • Automotive components

Process

  1. Identify standards.
  2. Pre-compliance testing.
  3. Formal testing at accredited lab.
  4. Test report for certification.

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Design tips

Address EMC early in design with shielding, filtering and layout.

Frequently asked questions

Is EMC testing mandatory in India?

For certain products under telecom, defence and sector rules; check product-specific requirements.

What if a product fails?

Redesign and retest.

Are foreign lab reports accepted?

Depends on the scheme and lab accreditation.

How long does testing take?

Days to weeks depending on scope.

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