box electrical for RF absorbers
box electrical for RF absorbers
Introduction of Eccosorb BSR-1/MFS-124
Electromagnetic interference (EMI) is a persistent challenge in aerospace, telecom, and automotive electronics. One of the most proven solutions is Eccosorb BSR-1, a thin, flexible silicone absorber designed to suppress resonances and absorb stray microwave energy. At New England Die Cutting (NEDC), we combine this powerful material with our custom die-cutting services to provide precision parts ready for seamless integration into your assemblies.
What Is Eccosorb BSR-1?
Eccosorb BSR-1 is part of the BSR series — magnetically loaded silicone elastomers that provide broadband microwave absorption.
Key specifications include:
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Frequency Range: Effective from ~6 GHz into the millimeter-wave range.
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Thickness Options: Standard sheets available from 0.25 mm to 2.54 mm.
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Standard Sheet Size: 12″ × 12″ (305 × 305 mm).
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Service Temperature: Continuous use up to 170 °C.
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Outgassing Performance (NASA tested): TML ~0.47%, CVCM ~0.28%.
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Insertion Loss: ~1 dB at 10 GHz.
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Electrical Properties: Electrically non-conductive.
These specs make BSR-1 suitable for demanding environments, from satellites to telecom base stations.
SS6M Adhesive Option (PSA Backing) – SS Tape
Eccosorb BSR-1 can also be ordered with the SS6M suffix, which indicates a pressure-sensitive adhesive (PSA) backing. This adhesive simplifies assembly by allowing peel-and-stick installation.
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Shelf Life: The SS6M PSA option has a 12-month shelf life when stored properly.
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Convenience: Eliminates the need for separate adhesives in the field.
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Die-Cut Ready: At NEDC, we frequently supply BSR-1 with PSA already die-cut to shape, making installation quick and reliable.
What Does Eccosorb BSR-1 Do?
The function of BSR-1 is simple yet powerful: it absorbs unwanted electromagnetic energy rather than letting it reflect or resonate. Engineers use it to:
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Suppress cavity resonances in housings, waveguides, and small enclosures.
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Reduce reflections and coupling, lowering noise and interference.
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Stabilize oscillators and converters by damping resonant effects.
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Improve overall EMC performance in sensitive electronics.
Typical Applications
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Aerospace & Defense: Radar systems, satellite modules, and avionics.
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Telecommunications: Base stations, active antenna systems, RF amplifiers.
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Automotive: Radar sensors and ADAS modules.
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Industrial & Medical: Sensitive RF equipment requiring resonance damping.
Where NEDC Adds Value: Custom Die-Cutting
At NEDC, we transform raw BSR-1 sheets into application-ready parts.
Our capabilities include:
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Precision die-cutting into custom shapes and sizes.
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Kiss-cutting on release liners for easy handling.
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Adhesive-backed options (SS6M) for quick installation.
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Prototype to production scaling — from one-off samples to large runs.
Because BSR-1 is a filled silicone material that can be challenging to process, our experience in die-cutting RF absorbers ensures high quality and consistency.
Summary: BSR-1 + NEDC Die-Cutting = Ready-to-Use Solutions
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BSR-1 absorbs energy, and reduces resonances across microwave and mm-wave frequencies.
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Specs include operation up to 170 °C, low outgassing (.47 TML%, and .28% CVCM), and thicknesses from 0.25 mm to 2.54 mm.
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SS6M PSA option provides peel-and-stick convenience with a 12-month shelf life.
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NEDC die-cuts BSR-1 into exact geometries, making it installation-ready for aerospace, telecom, automotive, and defense applications.
Conclusion/Nomenclature
If you need a high-performance microwave absorber that’s easy to integrate, Eccosorb BSR-1 is an excellent choice. Eccosorb BSR-1 is also known as MFS-124. Eccosorb is usually specific with adhesive backing like .010” ECCOSORB BSR-1/SS6M. NEDC is a Laird converter with a lot of experience cutting these type pads. With NEDC’s custom die-cutting services, you receive not just raw material, but precision-engineered parts that save time and improve performance.
For more information about RF absorber solutions and their applications across industries, visit our RF microwave absorbers page where you’ll find technical specifications, material comparisons, and case studies.