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Military Filters (Military EMI Filters)

Military EMI FiltersFor over two decades, LCR Electronics has designed, developed and manufactured a complete range of AC and DC Military EMI Filters (RFI Filters, EMC Filters) to help its customers meet MIL-STD-461 (MIL-461),
RTCA-DO160 and others EMC requirements.

These include standard off-the-shelf EMI filters as well as custom filters and suppression components, including:

  • NEW high-voltage COTS EMI filters:
    Our newest line of single phase, 300 VAC 50/60Hz COTS filters ideal for high reliability applications. Click here to read more, or see the single stage (0913) or double stage (0923) data sheets.
  • Single Phase 115/250 VAC COTS EMI filters:
    Click here to see the data sheet for our single stage (F9100) or two stage (F9200) standard voltage filters.
  • Aerospace / Tempest / Military EMI filters with the options of EMP, surge and spike suppression networks.

All LCR single phase COTS EMI filters operate over an extended temperature range of -40°C to +85°C (-40°F to +185°F)

LCR offers both AC and DC EMI filters for all current and voltage ratings and for 50/60Hz as well as 400Hz application. LCR also offers Aerospace / Tempest / Military EMI filters with the options of EMP, surge and spike suppression networks, upon request.

Military EMI Filter Development Process:

Budgetary Estimates: LCR gets involved with Military and aerospace customers from the initial concept / budgeting stage. We gather maximum possible information regarding product design features, major electrical and electronic components and technical requirements from engineers. This information enables us to do the initial EMI filter design and provide an initial budgetary estimate for the EMI filter.

Product Design Stage:  In the early stages of product design, we work with our customers to help them with EMI friendly design guidelines. In the final stages of the product design, we reevaluate our EMI filter design against the actual product design and modify the design, if necessary.

EMI Filter Design: Depending on our customer’s request, the prototype filter can either be supplied before the first EMC testing or after the first testing. The prototype filter (per the design accomplished in the product design stage) supplied before EMC testing is based on our customer’s initial design inputs. Once the results of first testing are received the EMI filter design is modified, if necessary, and finalized. On the other hand, if our customer needs the prototype filter after the first EMC testing is done, we look at the initial EMC test data and make modifications to the EMI filter design accomplished in the product design stage and then supply the prototype filter for final testing. LCR has the capability to

Military EMI Filter Specifications: Aerospace / Military EMI filters are generally built in a metal can and fully potted. The interconnection options range from fast-on terminals, solder tabs, threaded studs to hermetically sealed military connectors. Our EMI filters (RFI filters, EMC filters) are designed to meet relevant MIL-STD-810E environmental requirements, all the applicable MIL-F-15733 requirements and other Military standards requested by the customer. We also utilize the applicable clauses of other military specifications such as MIL-STD-220A etc as necessary.

Manufacturing: LCR has a fully vertically integrated manufacturing facility at Norristown, PA where the military EMI filters are built starting from metal can fabrication to final testing. With the capability to accomplish most of the critical process in house, LCR can offer filters prototypes much quicker and can offer lower lead times for the final production parts. Our quality standard conforms to MIL-I-45208, are certified to ISO9001-2000 and we utilize 6σ principles.

LCR has full EMC testing, EMC analysis and EMI filter design capabilities. With 2 fully equipped EMC test chambers and experienced EMC testing & EMI filter design engineers, customer products are tested, evaluated and brought into compliance quickly and cost-effectively.

Contact our engineering department for:

  • Problem Analysis and Assessment
  • EMC Testing to MIL-STD-461; MIL-STD- 220; TEMPEST; CE, etc
  • EMI Filter Design & Development
  • EMC Consulting Service
  • Product evaluation and Pre-Compliance Testing

Contact Us For More Information