datacenter, tape 3m cn-3190
Instead of a solid metal foil, CN-3190 uses a copper-nickel plated ripstop polyester fabric backing. That construction gives it several real-world advantages:
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It bends and conforms easily around corners, seams, and uneven surfaces
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It’s lightweight but surprisingly strong
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It’s easier and safer to handle than sharp-edged metal foils
The fabric backing is paired with a conductive acrylic adhesive, meaning electrical continuity is maintained not just across the tape surface, but through the adhesive backing itself. That makes it well suited for point-to-point grounding applications where dependable electrical contact is critical.
EMI Shielding Performance
CN-3190 delivers solid EMI shielding performance, typically in the 65–70 dB range under standard test conditions. Like all shielding materials, actual effectiveness depends on surface prep, pressure, contact area, and signal frequency — but in practice, this tape performs in many of the same applications traditionally handled by metal foil shielding tapes.
Common Applications of 3M CN-3190
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Grounding of electronic components, and assemblies
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EMI shielding for enclosures, and panels
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Shielded rooms, and equipment interfaces
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Electrical design labs and test environments
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Prototyping, and troubleshooting work
Because the tape is supplied on a removable liner, it’s easy to handle and well suited for die cutting, making it practical for both short runs, and production use. In the case wherekiss-cutting is required onto the liner, that can also be done.
Typical Properties of CN-3190 Tape
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Total thickness: 4.3 mils
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Backing: Copper/Nickel coated ripstop polyester (this is the material itself)
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Adhesive: Conductive acrylic adhesive
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Adhesion strength: 31 oz/in
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Breaking strength: 40 lb/in
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Electrical resistance through adhesive: ~0.05 ohms
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Color: Grey
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RoHS: Compliant
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Shelf life: 5 years under recommended storage conditions
When CN-3190 Is the Right Choice
If you need EMI shielding tape that conforms instead of fights you, CN-3190 is a strong option. It’s especially useful in designs where flexibility, clean handling, and consistent electrical contact matter more than maximum rigidity. NEDC custom die-cuts 3M tapes, since NEDC is an authorized 3M converter.
For engineers, technicians, and manufacturers looking for a dependable shielding tape that’s easy to work with during both development and production, CN-3190 remains a practical and proven solution from 3M Company.