4789AC51K Laird Technologies, 4789AC51K Datasheet - Page 9

• Manufacturer Part Number: 4789AC51K
• Description: GASKET, FOAM, 1M
• Manufacturer: Laird Technologies

Specifications of 4789AC51K

• Suppressor Type: I/O Gasket
• Body Material: Soft Urethane
• Attenuation: 90dB
• Width: 9.5mm
• Length: 1m
• Depth: 6.4mm
• Svhc: No SVHC (18-Jun-2010)
• External Depth: 6.4mm
• External Width: 9.5mm
• Shielding Type: EMI Shielding
• Gasket Material: Fabric Over Foam
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Fabric*
Foam*
Thermoplastic Elastomer
The recommended operating compression for Fabric-Over-Foam EMI Gaskets
will vary depending on the shape and size of the particular gasket.
Typically, D-Shaped, Rectangular Shaped, and Square Shaped Fabric-Over-Foam EMI
Gaskets should be compressed between 30% and 50% of the foam height.
Similarly, C-Shaped Fabric-Over-Foam EMI Gaskets should typically be compressed
between 50% and 75% of the gasket height.
Force Displacement Resistance (FDR) graphs are available upon request.
Please contact Engineering when unsure.
* Certain combinations of materials may not be available for all Profiles or I/Os.
Diverse Assembly Options
Multiple attachment options provide a variety of ways to install
critical EMI products. Pressure Sensitive Adhesive (PSA) has been
complemented with the Easy Peel
configurations. These mechanical attachment options enable you to
take advantage of existing tooling on doors and enclosures as well
as offer alternate attachment methods to better meet design
requirements.
Profile Gasket Tolerances
For parts shorter than 1 inch (25.4mm), or longer than 96" (2438.4mm), please consult Engineering for
tolerances. See back cover for contact information.
All dimensions shown are in inches (millimeters) unless otherwise specified.
Fabric Types
Please consult the Engineering Department at Laird Technologies when unsure.
Knit Mesh
Foam Types
Ripstop
Taffeta
Urethane
(TPE)
Length Inches (Millimeters)
48 to 70 (1219.2 – 1778.0)
70 to 96 (1778.0 – 2438.4)
11 to 48 (279.4 – 1219.2)
6 to 11 (152.4 – 279.4)
1 to 6 (25.4 – 152.4)
Height & Width
Profile
Metal Coating
Ni/Cu, Sn/Cu
Compression Set
(ASTM D 3574)
Ni/Cu
Ni/Cu
5 to 10%
< 20%
< 0.07 ohms/square I/O or Profile Gaskets
< 0.07 ohms/square
< 0.1 ohms/square
Conductivity
(ASTM F390)
Charcoal or
Off White
Color
Tan
®
release liner, and rigid clip
Tolerance Inches (Millimeters)
Tolerance Inches (Millimeters)
I/O or Profile Gaskets Flame Retardant,
Profile Gaskets
Profile Gaskets
Application
Application
I/O Gaskets
± .020 (0.5)
± .030 (0.8)
± .050 (1.3)
± .100 (2.5)
± .187 (4.7)
± .250 (6.4)
Low Compression
Complex Shapes,
Flame Retardant,
Complex Shapes,
Complex Shapes,
Shear Resistance
Flame Retardant
Flame Retardant
Complex Shapes
Flame Retardant
Low Cost,
Benefits
Benefits
Gasket,
Pressure Sensitive Adhesive*
Other Pressure Sensitive Adhesives can be provided. Contact Engineering to discuss requirements.
or equivalent
or equivalent
Nitto D5052
3M™ 9485
Sensitive
Adhesive
Pressure
Figure 2
180° Peel Strength
on Stainless Steel
(ASTM D-3330)
(82N/100mm)
(95N/100mm)
87 oz / in
75 oz/in
METALLIZED CONDUCTIVE PRODUCTS
PROFILE & I/O CONSTRUCTION OPTIONS
Force Displacement Resistance Comparing Different Foams
Urethane Foam & Thermoplastic Elastomer (TPE Foam)
Shear Resistant
Shear Resistant
Application
High Tack,
High Tack,
% Compression
and Temperature Resistant
High Cohesive Strength,
High Peel Strength
High Peel Strength
and Temperature
Benefits
Resistant
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