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Eccosorb® BSR / MFS  

High Loss, Magnetically Loaded, Elastomeric Microwave Absorber  

HIGH-LOSS ELASTOMERIC ABSORBER  

Eccosorb BSR / MFS is a thin, flexible, high-loss, electrically non-conductive silicone absorber.  

It is designed for the frequency range from 6 GHz to 18 Ghz and above . It has low outgassing  

properties and high temperature resistance.

 

BSR / MFS is flexible and can be fitted to  

compound curves.

 

BSR and MFS refer to the same product where BSR-1 is MFS-124 and  

BSR-2 is MFS-117.  

FEATURES AND BENEFITS  



Flexible structure for improved fit  



High thermal stability  



Electrically non-conductive  



High magnetic loss  

MARKETS  



Mobile / Data Infrastructure  



Security and Defense  



Automotive Electronics  



Industrial Electronics  



Space  



Low outgassing  



Good adhesion to metals  

VALUE  



Simplified design due to mechanical and electrical properties  



Environmentally friendly solution meeting regulatory requirements of RoHS and REACH  



Improved reliability performance of electronics  

o

o

o

Better signal integrity due to high reduction of EMI  

Consistent electronics performance due to low outgassing properties  

Reliable mechanical attachment  

TYPICAL PROPERTIES  

Frequency Range (GHz)  

Service Temperature °C  

Flame Rating  

TYPICAL DATA  

6 – 35  

–

40 +170  

UL 94 V-0  

> 70  

Hardness (Shore A)  

Density (g/cc)  

4.2  

Elongation (%)  

50  

Tensile Strength (MPa)  

Volume Resistivity (ohm-cm)  

Thermal Expansion (per °C)  

Thermal Conductivity (W/mK)  

Water Absorption (% 24 hours)  

Dielectric Strength (v/mil)  

Outgassing (%TML) (%CVCM)*  

5.0  

2 x 1

0

9  

63 x 10

-6  

0.865  

< 0.1  

> 10  

0.47 / 0.28  

Data for design engineer guidance only. Observed performance varies in application.  

Engineers are reminded to test the material in application.  

*

Outgassing data per ASTM E595-07; criteria for acceptability is 1.00% TML and 0.10%  

CVCM.  

APPLICATIONS  



Eccosorb BSR/MFS is engineered to reduce or eliminate surface currents, cavity  

resonance, coupling, and generally dampen reflections. It will significantly improve the  

operation of microwave devices by lowering the Q of cavities.  

USA: +1.866.928.8181  

Europe: +49.8031.24600  

Asia: +86.755.2714.1166  

It can also be used terminations, loads, attenuators in microwave circuits, and in  

waveguides and transmission systems.  

Hybrid Thermal/EMI Absorber  



Eccosorb BSR/MFS is recommended for use in high reliability aerospace, military, and  

space applications, exhibiting excellent thermal cycling, shock and vibration absorption  

characteristics.  



Some other applications include power amplifiers, oscillators and down/up converters.  

AVAILABILITY  



Standard sheets are 305 x 305mm (12”x12”).  



Standard thicknesses are 0.25mm (0.010”),0.32mm (1/8”),0.50mm (0.020”),  

0.64mm(1/4”),1.0mm (0.040”), 1.27 mm (1/2”),1.5mm (0.060”) and 2.54mm (0.100”)  



It can be supplied with or without pressure sensitive adhesive (PSA).  



Available in other thicknesses, sizes, and customer specified shapes upon request.  

INSTRUCTIONS FOR USE  



This material is designed to function directly in front of a metallic surface.  



For applications where the service temperature exceeds 121°C (250°F), the material can  

be bonded to most substrates by using an RTV silicone based adhesive in conjunction with  

a suitable primer.  



This material can be readily cut with a sharp knife and template.

 

It is a very flexible  

material and conforms to contoured surfaces.  

USA: +1.866.928.8181  

Europe: +49.8031.24600  

Asia: +86.755.2714.1166  

RFP-DS-BSR MFS 092221  

A

ny information furnished by Laird Technologies, Inc. and its agents is believed to be accurate and reliable. All specifications are subject to change without notice. Responsibility for the use and application of Laird Technologies materials rests with the end  

user. Laird Technologies makes no warranties as to the fitness, merchantability, suitability or non- infringement of any Laird Technologies materials or products for any specific or general uses. Laird Technologies shall not be liable for incidental or  

consequential damages of any kind. All Laird Technologies products are sold pursuant to the Laird Technologies’ Terms and Conditions of sale in effect from time to time, a copy of which will be furnished upon request. © Copyright 2015 Laird Technologies,  

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