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Flexible EMI absorber sheets 5780
The flexible EMI absorber sheets, developed for electromagnetic-wave absorption and noise suppression, can eliminate noise effectively
The flexible EMI absorber sheets, developed for electromagnetic-wave absorption and noise suppression, can eliminate noise effectively. EMC/EMI problems are solved by attaching noise-suppression sheets simply on the parts that are sources of noise.
Features and advantages
- Very flexible and easy to handle
- Can be delivered in any shape, size and/or thickness
- Optionally available as a custom-made tube
- Can be cut according to the customer's drawings
- Provides effective EMI suppression in a wide frequency range (1 MHz to 18 GHz)
- Changes the magnetic flux path to avoid interference with other components or surrounding cables
- Reduces the eddy current when the magnetic flux is close to metal
- Non-conductive adhesive backing (UL recognized) available
- Effective in preventing resonance and suppressing coupling
- High surface resistance (>106 ohms)
- Easy and fast to process due to self-adhesive
Applications
- RFID (Radio Frequency Identification) systems
- NFC (Near-field communication)
- Wireless power chargers (WPC / Qi)
- Computers (NB / Desktop / Tablet) and peripherals
- Digital Products
- Mobile phones / Smart phones / Phablet
- Wireless equipment
- EMI-shielding box / Dark box
- Between printed circuit boards
- On ICs, processors, and controllers
- On cables that need high flexibility
Part numbers and characteristics
| Properties | Unit | 5780-C1 | 5780-C3 | 5780-C5A | 5780-C5B | 5780-C7 |
| Operating temperature | °C | -40 ~ +85 | -40 ~ +85 | -40 ~ +85 | -40 ~ +85 | -30 ~ +120 |
|---|---|---|---|---|---|---|
| Applicable frequency | GHz | 1 MHz ~ 18 GHz | 1 MHz ~ 18 GHz | 1 MHz ~ 9 GHz | 1 MHz ~ 9 GHz | 1 MHz ~ 3 GHz |
| Relative permeability (μ’@1MHz) | - | 25 | 50 | 150 | 250 | 140 |
| Material | - | Magnetic powder + rubber |
Magnetic powder + rubber |
Magnetic powder + rubber |
Magnetic powder + rubber |
Sintered ferrite |
| Thickness range | mm | 0.12 - 2.50 | 0.25 / 0.50 / 0.75 | 0.05 - 0.50 | 0.05 / 0.50 | 0.08 / 0.12 / 0.22 |
| Max. dimension | mm | 600 x 400 | 600 x 400 | 210 x 297 (A4) | 210 x 297 (A4) | 130 x 130 |
| Surface resistance | Ohm | 106 | 106 | 105 | 105 | 109 |
| Density | g/cm3 | 3.6 | 4.8 | 4.4 | 4.4 | 3.8 |
| RoHS 2.0 compliance | - | 2011/65/EU | 2011/65/EU | 2011/65/EU | 2011/65/EU | 2011/65/EU |
| Halogen free | - | No | No | Yes | Yes | Yes |
Usage examples
EMI-enclosure solutions using only EMI-shielding tape or with EMI absorbers
Effect diagram - Magnetic shield
Effect diagram - RFID/NFC on metal
magnetic flux to cancel the communication. After attaching an EMI absorber sheet between the metal and the RFID
antenna, the communication recovered.
Effect diagram - Wireless power charger
Permeability characteristics
Methods of measurement
Insertion loss
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Return loss (1 MHz ~ 3 GHz)
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Return loss (3 GHz ~ 18 GHz)
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Choosing the right EMI flexible absorber sheet
| Item | 5780-C1 | 5780-C3 | 5780-C5A | 5780-C5B | 5780-C7 |
| Economical | Best | Good | Poor | Middle | Middle |
|---|---|---|---|---|---|
| Operation temperature | -40 ~ + 85 °C | -30 ~ + 120 °C | |||
| Material | Magnetic powder + rubber | Sintered ferrite | |||
| Relative permeability (μ’@1MHz) | 25 | 50 | 150 | 250 | 140 |
| Thinnest version | 0.12 mm | 0.25 mm | 0.05 mm | 0.05 mm | 0.08 mm |
| Thickest version | 2.50 mm | 0.75 mm | 0.50 mm | 0.50 mm | 0.22 mm |
| Surface resistance | 106 | 106 | 105 | 105 | 109 |
| RoHS 2.0 compliance | 2011/65/EU | ||||
| Halogen free | No | Yes | |||
| Best application | RFID/NFC | EMI, RFID/NFC | EMI, RFID/NFC wireless charger (no magnet type) | ||
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