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Combat EMI Interference

Chomerics has increased its range of EMI shielding products with the addition of CHO-MUTE RF absorber material. Available in two grades, it can be used to eliominate EMI and EMC problems in applications such as transmitters, receivers, microcontrollers and microprocessors.

These new elastomers incorporate a high-technology, ferrous-filled silicone polymer system that gives wide band absorption of up to 20dB between 30MHz and 12GHz for CHO-MUTE 9020, and 25dB between 500MHz and 18GHz for CHO-MUTE 9000. The material is said to be effective at absorbing both surface currents and free-space electromagnetic fields.

The material is available in sheet form, die-cut or as moulded parts and in thcknesses from 0.25 to 3.0mm. Both grades have an operating temperature range of -50 to +160°C and can be supplied with a pressuresensitive adhesive to aid assembly.

Also new from Chomerics are non-halogenated flame-retardant grades of its Premier conductive plastic shileding materials. Rated to UL94 V-0, the new materials are offered with three different levels of shielding performance, allowing engineers to choose the material that accurately matches the shielding and mechanical requirements of the application. These flame-retardant materials are available in three compounds for increasing shielding levels.

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