Datasheet
Eccosorb® BSR / MFS
High Loss, Magnetically Loaded,
Elastomeric Microwave Absorber
Americas: +1.866.928.8181
Europe: +49.(0).8031.2460.0
Asia: +86.755.2714.1166
www.lairdtech.com
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 1 GHz to mm wave. 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
Low outgassing
Good adhesion to metals
MARKETS
Mobile / Data Infrastructure
Security and Defense
Automotive Electronics
Industrial Electronics
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 Better signal integrity due to high reduction of EMI
o Consistent electronics performance due to low outgassing properties
o Reliable mechanical attachment
TYPICAL PROPERTIES
TYPICAL DATA
Frequency Range (GHz)
1 – 40
Service Temperature °C
160
Flame Rating
UL 94 V-0 (BSR-1)
Hardness (Shore A)
> 70
Elongation (%)
50
Tensile Strength (MPa)
5.0
Volume Resistivity (ohm-cm)
2 x 10
8
Thermal Expansion (per °C)
63 x 10
-6
Thermal Conductivity (W/mK)
0.865
Water Absorption (% 24 hours)
< 0.1
Dielectric Strength (v/mil)
> 10
Outgassing (%TML) (%CVCM)*
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.
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.