LAIRD CFS-8480

LAIRD Eccosorb CFS-8480 is a two-component, magnetically loaded castable silicone rubber for RF absorption in the UHF and lower microwave ranges. The supplier lists a frequency range of 800 MHz to 18 GHz and separately reports typical attenuation values from 600 MHz to 10 GHz. The material can be poured into cavities or painted onto surfaces, with a 1000:9 Part A-to-Part B mix ratio by weight and approximately one hour of pot life. Typical properties include a service temperature below 275°C, dielectric strength of 12 kV/mm, volume resistivity above 1012 ohm-cm, and water absorption below 0.2% after 24 hours.

Key features

• RF absorption range: Listed for 800 MHz to 18 GHz, with typical attenuation data provided at 600 MHz, 1 GHz, 3 GHz, 8 GHz, and 10 GHz.
• Castable two-part processing: Mixes at 1000:9 by weight, provides about one hour of pot life, and cures for two hours at 90°C.
• Thermal and electrical properties: Service temperature below 275°C, dielectric strength of 12 kV/mm, and volume resistivity above 1012 ohm-cm.

Applications / Suitable for

• Surface-current reduction and cavity-Q control
• Coatings for magnetrons and klystrons
• Transmission-line attenuators and terminators
• Molded RF absorber parts and absorptive potting