Hi Doug, What do you imagine such a driver circuit would contain that has any significant EM emissions?
Best Regards, -Lauren Crane From: Douglas Nix <[email protected]> Sent: Tuesday, December 16, 2025 9:45 AM To: [email protected] Subject: Re: [PSES] EMC compliance for non-emitters? External Email: Do NOT reply, click on links, or open attachments unless you recognize the sender and know the content is safe. If you believe this email may be unsafe, please click on the "Report" button on the top of Outlook. Hi Lauren, I'd assume that the LED indicator has a driver circuit embedded in the block, and therefore it has some ability to emit EMI and might otherwise have been susceptible to EMI in the environment, but for the immunity techniques used on the driver board. Doug Nix Kitchener, Ontario, Canada [email protected]<mailto:[email protected]> +1 (519) 729-5704 On Dec 16, 2025, at 10:31, Lauren Crane <[email protected]<mailto:[email protected]>> wrote: Dear Experts, I have a weird Customs challenge. I am trying to import to the US an LED indicator wrapped up in a small case etc... it is a part of a company's switch line up. It is essentially a lighted (LED) single pole switch block for a pushbutton, rated to operate at 24 V AC/DC. The OEM has declared the following compliance : * Resistance to fast transients 2 kV IEC 61000-4-4 * Resistance to electromagnetic fields 9.1 V/m (10 V/m) IEC 61000-4-3 * Resistance to electrostatic discharge 6 kV on contact (on metal parts) IEC 61000-4-2 8 kV in free air (in insulating parts) IEC 61000-4-2 * Electromagnetic emission Class B IEC 55011 This gives it the appearance as an item of EMC-interest, thus triggering (apparently) the import broker to flag it for the FDA import form 2877. My question is why would the switch OEM company do this? I can see why ESD and fast transients might be of interest to a switch, but why say it is compliant to an emission standard when the item in and of itself is not an emitter? I'm nearly certain it is compliant to the cited standard because it has no emissions of its own at all. Similarly one could declare these compliances for a length of insulated conductor, but it really makes no sense to do so. It does operate off of 24V AC and DC, but I doubt there are any active components doing power conversion internally. Thanks in advance for any insights you might have.... Best Regards, -Lauren Crane LAM RESEARCH CONFIDENTIALITY NOTICE: This e-mail transmission, and any documents, files, or previous e-mail messages attached to it, (collectively, "E-mail Transmission") may be subject to one or more of the following based on the associated sensitivity level: E-mail Transmission (i) contains confidential information, (ii) is prohibited from distribution outside of Lam, and/or (iii) is intended solely for and restricted to the specified recipient(s). 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To post a message to the list, send your e-mail to [email protected]<mailto:[email protected]> All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ <https://ewh.ieee.org/soc/pses/> Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe)<https://ewh.ieee.org/soc/pses/list.html> List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: [email protected]<mailto:[email protected]> Rick Linford at: [email protected]<mailto:[email protected]> For policy questions, send mail to: Jim Bacher at: [email protected]<mailto:[email protected]> ________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 ________________________________ This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to [email protected]<mailto:[email protected]> All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe)<https://ewh.ieee.org/soc/pses/list.html> List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: [email protected]<mailto:[email protected]> Rick Linford at: [email protected]<mailto:[email protected]> For policy questions, send mail to: Jim Bacher at: [email protected]<mailto:[email protected]> ________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 Confidential - Limited Access and Use - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to [email protected] All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
