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
Various types flexible EMI absorber sheets
Various types of flexible EMI absorber sheets
Flexible EMI absorber sheet bend around cable tube
Flexible EMI absorber sheet can be bent easily around a cable (optionally available as a tube)

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

Flexible EMI absorber sheets Wrap around cable
Example 1: Wrapped around a cable
Flexible EMI absorber sheets Apply flat cable
Example 2: Applied to a flat cable
Flexible EMI absorber sheets Apply integrated circuit (IC) top
Example 3: Applied to an integrated circuit (IC) top
Flexible EMI absorber sheets Apply between integrated circuit
Example 4: Applied between integrated circuits
Flexible EMI absorber sheets Apply case between boards
Example 5: Applied to case and between boards

EMI-enclosure solutions using only EMI-shielding tape or with EMI absorbers

EMI enclosure solutions EMI shielding tapes
EMI enclosure solutions using only EMI-shielding tape
EMI enclosure solutions EMI shielding tapes absorbers
EMI enclosure solutions using EMI-shielding tape and EMI absorbers

Effect diagram - Magnetic shield

EMI flexible absorber sheets change magnetic flux path

5780 EMI flexible absorber sheets can change the magnetic flux path to keep the magnetic flux from affecting other components.

Effect diagram - RFID/NFC on metal

EMI flexible absorber sheets eddy current magnetic field RFID

The magnetic flux induced an eddy current and generated a reverse magnetic field to offset the
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

EMI flexible absorber shets wireless power charger eddy current

5780 EMI Flexible absorber sheets can be used for a wireless power charger to avoid eddy current when the RX coil is attached to metal; this changes the magnetic flux path between TX coil, RX coil, and magnet.

Permeability characteristics

EMI Flexible absorber sheets permeability characteristics
5780-C1, 5780-C3, EMI flexible absorber sheets, permeability characteristics
EMI flexible absorber sheets permeability characteristics
5780-C5A, 5780-C5B, 5780-C7 EMI flexible absorber sheets, permeability characteristics

Methods of measurement

EMI Flexible absorber sheets power loss measurement
5780 EMI flexible absorber sheets, power loss measurement
EMI Flexible absorber sheets reflection loss measurement
5780 EMI flexible absorber sheets, reflection loss measurement

Insertion loss

EMI flexible absorber sheets insertion loss
5780 EMI flexible absorber sheets Insertion loss

Return loss (1 MHz ~ 3 GHz)

EMI Flexible absorber sheets return loss 1MHz ~ 3GHz
5780 EMI flexible absorber sheets Return loss (1MHz ~ 3GHz)

Return loss (3 GHz ~ 18 GHz)

EMI Flexible absorber sheets return loss 3GHz ~ 18GHz
5780 EMI flexible absorber sheets Return loss (3GHz ~ 18GHz)

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)

 

Would you like to...

To get a quotation for Flexible EMI absorber sheets within 24 hours fill in the form below.

Select an option:
C1 : Magnetic powder + rubber
C3 : Magnetic powder + rubber
C5A : Magnetic powder + rubber
C5B : Magnetic powder + rubber
C7 : Sintered ferrite
Specify the width in mm
Specify the length in mm
Specify the desired thickness. The options can be found in the table above.
* Note: The red blocks are required