EFF(03)-240X240T0800 vs 2-5-1170
| Part Number |
-240X240T0800.jpg)
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| Category | RFI and EMI - Shielding and Absorbing Materials | RFI and EMI - Shielding and Absorbing Materials |
| Manufacturer | KEMET | 3M (TC) |
| Description | FLEX SUPP. SHEET 240X240X0.3 | TAPE ALUM FOIL 50.8MMX4.6M |
| Package | - | - |
| Series | EFF | 1170 |
| Type | Absorbing Sheet | Shielding Tape |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 130°C |
| Shape | Square | - |
| Length | 9.449" (240.00mm) | 15.000' (4.60m) |
| Width | 9.449" (240.00mm) | 2.000" (50.80mm) |
| Thickness - Overall | 0.013" (0.33mm) | 0.003" (0.08mm) |
| Adhesive | Non-Conductive, Single Sided | Conductive, Single Sided |
| Material | Polymer Resin, Magnetic Powder | Aluminum Foil |
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1. What is the role of gaskets and seals in EMI shielding?
Gaskets and seals ensure continuous contact between shielded components, preventing leaks in electromagnetic enclosures. Common materials include conductive elastomers and fabric-over-foam.
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2. What is the difference between near-field and far-field EMI, and how does it affect shielding?
Near-field EMI: Dominates at lower frequencies; requires materials with high magnetic permeability (e.g., Mu-metal).
Far-field EMI: Dominates at higher frequencies; relies on conductive materials to reflect or absorb interference. -
3. How are shielding effectiveness and absorption measured?
Shielding effectiveness: Measured in decibels (dB), indicating how much interference is blocked.
Absorption: Tested by the material's ability to dissipate electromagnetic energy. -
4. What are common standards for EMI/RFI shielding materials?
MIL-STD-461: Military standard for electromagnetic compatibility.
IEC 61000-4-3: Tests immunity to radiated RF fields.
FCC Part 15: Regulates emissions for consumer electronics in the U.S.
