EMC absorbers

Our wide range of EMC electromagnetic absorbers

Absorbers designed and manufactured by Siepel comply with standardised Electromagnetic Compatibility (EMC) tests, such as:

• Automotive: CISPR25, ISO 11452
• Aeronautics & space: RTCA/DO160x
• Industry: CISPR/EN 14 -16 -22, IEC/EN 61000-4-3
• Defence: MIL-STD-461, STANAG (incl. AECTP 500)

All the following models can be used in new installations, for refurbishment or upgrading of chambers. Our expertise allows us to offer you the right absorbers for a specific chamber design and / or installation.

SEA-PM – Broadband pyramidal absorbers

Pyramidal absorbers used for the lining of anechoic chambers for EMC testing of automotive, aerospace and defence equipment.

• Frequency range: from 80 MHz to 40 GHz.
• Maximum power handling: 2 kW/m²
• Maximum temperature: + 160°C – 320°F
• Dimensions:
  • Height: from a few centimetres to more than 1 metre – from 1.1” to 43.3”
  • Base size: 610×610 or 305×305 mm – 24”x24” or 12”x12”
  • Custom-made possible
• Indoor use
• Laying: linearly; glued or on Velcro®

Our assets:

• SEA-PM offers you excellent physical properties
• LIV-coating available: offers brightness, flexibility, and a wide choice of colours
• Cleanroom condition: ISO class 4 according to ISO 14644-1
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks
• Chamber design & overall chamber performance calculation

Range of sizes and performances depending on the need and the space available.

SEA- TM – Broadband truncated absorbers

SEA-PM absorbers with truncated tips, SEA-TM optimise the usable space inside anechoic chambers. EMC applications: defence and aeronautics.

• Frequency range: from 80 MHz to 40 GHz
• Maximum power handling: 1.7 kW/m2
• Maximum temperature: + 160°C – 320°F
• Dimensions:
  • Height: 500 mm – 20’’
  • Base size: 610×610 mm – 24’’x24’’
• Indoor use
• Laying: linearly ; glued or on Velcro®

Our assets:

• SEA-TM offers you excellent physical properties
• Cleanroom condition: ISO class 4 according to ISO 14644-1
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks
• Chamber design & overall chamber performance calculation

SEA-HY – Hybrid pyramidal absorbers

SEA-HY are used in EMC anechoic chambers for commercial and industrial testing (CISPR16-1-4), automotive (CISPR25), defence (MIL-STD-461) and aerospace (DO160). They are hybrid absorbers glued on ferrite absorbers panels which can be purchased together or separately.

Our SEA-HY can be installed to upgrade or renovate existing ferrite chambers.

• Frequency range: from 30 MHz to 40 GHz (with ferrite absorbers)
• Maximum power handling: 2 kW/m2
• Maximum temperature: + 160°C – 320°F
• Dimensions:
  • Height: from 305 to 455 mm – from 12’’ to 18’’
  • Base size: 605×605 mm – 23.8’’x23.8’’
  • Custom-made possible
• Indoor use
• Laying: glued on ferrite tiles

Our assets:

• High reflectivity performance over a wide frequency band
• Cleanroom condition: ISO class 4 according to ISO 14644-1
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks
• Chamber design & overall chamber performance calculation

SEA HYT – Hybrid truncated absorbers

Truncated SEA-HY designed to optimise the usable space inside anechoic chambers while maintaining the performance required by the industrial and defence EMC standards.

Our SEA-HYT can be installed to upgrade or renovate existing ferrite chambers.

• Frequency range: from 30 MHz to 40 GHz (with ferrite tiles)
• Maximum power handling: 2 kW/m2
• Maximal temperature: + 160°C – 320°F
• Dimensions:
  • Height: from 100 to 500 mm – from 12’’ to 19.7’’
  • Base size: 605×605 mm – 23.8’’x23.8’’
  • Custom-made possible
• Indoor use
• Laying: glued on ferrite tiles

Our assets:

• High reflectivity performance over a wide band
• Cleanroom condition: ISO class 4 according to ISO 14644-1
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks

Chamber design & overall chamber performance calculation

Range of sizes and performances depending on the need and the space available.

SEA-FE – Ferrite absorbers

Absorbers made of ferrites. Chambers lined with ferrite tiles can meet the performances requested by EMI and EMS testing up to 1 GHz.

In order to extend the performances up to 18 GHz (or more), hybrid foam absorbers must be added on top of the ferrite tiles. We recommend using SEA-HY & HYT.

• Density: d < 5g/cm3
• Non-combustible material
• Dimensions:
  • Thickness: from 6.7 to 8 mm – from 0.26’’ to 0.31’’
  • Standard size: 100×100 mm and 300×300 mm – 3.94’’x3.94’’ and 11.81”x11.81’’
• Indoor use
• Laying: Smart rail system made of horizontal and vertical struts attached onto the shielded room or
• glued or screwed

Our assets:

• Ingenious rail system:
  • Ensures easy installation and dismantling for the customer without any loss of material
  • No drilling to be done in the shielding panels guaranteeing high shielding effectiveness performances
  • Reliable fixation ensuring no risk of ferrite detachment
• 25-year mechanical system warranty
• REACH & RoHS Compliant
• Factory cut, ready to install blocks

SEA-F – Flat absorbers

Flat absorbers to cover the corners of fully anechoic and semi-anechoic chambers.

• Frequency range: from 200 MHz to 40 GHz
• Maximum power handling: 1.6 kW/m2
• Maximum temperature: + 160°C – 320°F
• Dimensions:
  • Thickness: from 20 to 200 mm – 0.8’’ to 8’’
  • Standard size: 610 x 1220 mm – 24’’x48’’
  • Custom-made possible
• Indoor use
• Laying: glued or on Velcro®

Our assets:

• SEA-F offers you excellent physical properties
• LIV-coating available: offers brightness, flexibility, and a wide choice of colours
• Cleanroom condition: ISO class 4 according to ISO 14644-1
• REACH & RoHS Compliant
• Compliance with fire test standards: NRL 8093 (test 1,2,3), DIN 4102-B2, ISO 11952-2, Euroclass E
• Factory cut, ready to install blocks

Range of sizes and performances depending on the need and the space available.