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ESD/EMI Cores | KEMET NEC/TOKIN

KEMET offers the following ESD/EMI Cores for round and flat cable.

Flat Cable

Image Description Features  Applications Buy Now View Datasheet
 ESD-FPD-1.jpg ESD-FPD-1 Series Split Cores with Plastic Clamp for Flat Cables
  • Split construction
  • Nylon clamp
  • Consumer electronics
Buy Now button KEMET Evox Rifa Datasheet View Datasheet
 ESD-FPD-11.jpg ESD-FPD Series Split Cores with
Metal Clamp for Flat Cables
  • Split construction
  • Stainless steel clamp
  • Consumer electronics
Buy Now button KEMET Evox Rifa Datasheet View Datasheet
 ESD-FPL.jpg

ESD-FPL Series Solid Cores for
Flat Cables

  • Solid construction
  • Thin and Minimal Gap types available
  • Consumer electronics
Buy Now button KEMET Evox Rifa Datasheet View Datasheet

 

Round Cable

Image Description Features  Applications Buy Now View Datasheet
 B-20.jpg B-20 Series Bead Cores
  • Solid construction
  • MnZn (≤ 100 MHz, AM band range) and NiZn (≤ 300 MHz, FM band range) options available
  • Consumer electronics
Buy Now button KEMET Evox Rifa Datasheet View Datasheet
 ESD-R.jpg ESD-R Series Toroidal Cores
  • Solid construction
  • MnZn (≤ 100 MHz, AM band range) and NiZn (≤ 300 MHz, FM band range) options available
  • Bare, coated and case types available
  • Consumer electronics
Buy Now button KEMET Evox Rifa Datasheet View Datasheet
 ESD-R-B.jpg

ESD-R-B Series Toroidal Cores with Snail-shaped Case

  • Solid construction
  • MnZn (≤ 100 MHz, AM band range) and NiZn (≤ 300 MHz, FM band range) options available
  • Case flame resistant rating: UL94V-2
  • Consumer electronics
Buy Now button KEMET Evox Rifa Datasheet View Datasheet
 ESD-R-H.jpg ESD-R-H Series Toroidal Cores for Round  Cables with High Heat Resistance and Cable
Holding Mechanism
  • Split construction
  • Improved maximum allowable temperature (increased from up to 60°C to up to 120°C
  • Cable holding mechanisms provided (enables installation with two M4 screws, holding of cables with bands)
  • Unique core material enables high performance in low frequency range
  • Consumer electronics (air conditioners, refrigerators, etc.)
  • Industrial equipment (INV, robots,etc.)
N/A KEMET Evox Rifa Datasheet View Datasheet
 ESD-SR.jpg ESD-SR Series Snap-on Cores for Round Cables
  • Split construction
  • Snap-on convenience
  • Temperature Index: 65°C
  • Flame Class: UL94V-0
  • CTI: Rank 0
  • Consumer electronics
Buy Now button KEMET Evox Rifa Datasheet View Datasheet
 ESD-SR-H-HL.jpg

ESD-SR-H/HL Series Snap-on Cores for  Round Cables with High Heat Resistance and Cable Holding Mechanism

  • Split construction
  • Snap-on convenience
  • Cable holding mechanisms provided (fixing of cables / enclosures with fixing bands possible)
  • Unique core material enables high performance in low frequency range
  • Automotive (ESP, etc.)
  • Information and communication devices
  • Audio-visual equipment
  • Consumer electronics
Buy Now button KEMET Evox Rifa Datasheet View Datasheet

Turns and Impedance Characteristics

When the desired performance of an EMI core cannot be obtained with a single pass through the core, the impedance characteristics can be changed with multiple turns.

A turn is counted by the number of lead-wire windings which pass through the inner hole of the core. Windings on the outside of the core do not count.

Adding turns will result in higher impedance while also lowering the effective frequency range.

Core Material and Effective Frequency Range

There are two ferrite material options for KEMET EMI Cores: Nickel-Zinc (Ni-Zn) and Manganese- Zinc (Mn-Zn). Each core material has a different resistance and effective frequency range. The Mn-Zn core material has lower resistance compared to the Ni-Zn; therefore, be sure to provide adequate insulation before use.

For reference, the Ni-Zn core material is typically effective for the frequencies in the MHz band range such as the FM-band, while the Mn-Zn core material is typically effective for the kHz band range such as the AM-band.

It is recommended to verify actual effectiveness in the target application with measurements.