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AB7050HF

Series EMI Absorber

3M 

3M™ AB7000HF

Series EMI Absorber

Data Sheet

February 2009

Description

Agency Approvals

& Self Certifications

3M™ AB7000HF Series EMI Absorber consists of a flexible polymer resin loaded with

soft metal flakes. An acrylic pressure-sensitive adhesive allows for easy application.

• Low Halogen version of AB7000 absorber. Meets guidelines set forth in IEC

61249-2-21.

• Flexible, high permeability magnetic sheets

• One-sided acrylic pressure sensitive adhesive

• Easily die cut into complex shapes

RoHS 2002/95/EC

RoHS Compliant 2002/95/EC” means that the product or part (“Product”) does not contain any of the substances in excess of the

maximum concentration values in EU Directive 2002/95/EC, as amended by Commission Decision 2002/618/EC, unless the

substance is in an application that is exempt under RoHS. This information represents 3M’s knowledge and belief, which may be

based in whole or in part on information provided by third party suppliers to 3M.

Applications

AB7000HF absorber is typically used for applications requiring EMI control and signal

integrity improvement in the 50MHz to 10 GHz range. It is a broadband EMI absorber

designed to work in near-field applications inside and around electronic devices and

assemblies. Common applications include reduction of noise and crosstalk inside

mobile electronics, reduction of crosstalk and EMI on ribbon cables and flex cables,

reduction of radiated IC noise (applying absorber directly to the noisy IC), damping of

radiation and oscillations inside shields and cavities, and increasing signal integrity on

high speed data lines through crosstalk reduction.

Attenuation and

Power Loss

Typical Properties

Many factors determine the true attenuation of an electromagnetic interference

absorbing material, including shape and thickness, intimacy of substrate contact,

smoothness of application surface, strength and frequency of the EMI signal, etc.

Since AB7000HF absorber is a near field absorber, attenuation characteristics tend to

be very application specific. Power loss characteristics are measured using a 5cm x

5cm square of AB7000HF absorber placed on a 50Ω microstrip line. The attenuation

and noise dampening attained generally increases as the thickness of the material

increases.

Not for specifications. Values are typical, not to be considered minimum or maximum.

Properties measured at room temperature 73°F (~23°C ) unless otherwise stated.

Physical Property (Test Method)

Typical Value

Adhesive

Type of Backing

Product Number

Backing Thickness

Adhesive Thickness

Acrylic non-conductive pressure-sensitive adhesive (PSA)

Polymer resin with magnetic metal flake filler

AB7010HF AB7020HF AB7030HF AB7050HF

0.13mm

0.25mm

0.35mm

0.55mm

0.03mm

0.05mm

0.05mm

0.05mm

Standard packaging

210mm x 297mm

Temperature Range

-25°to 85°C

Surface resistivity (ASTM D-257)

1x10 6Ω(min)

Initial Permeability1

110

Typical Performance2

Refer to S11 attenuation and power loss graphs

Notes: 1.This value measured at 1MHz 3M TM K RD-EMC-AB-02. 2. Attenuation is measured by 7mm coaxial verification kit

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