Cable Ferrites

Part Number	Description / PDF	Quantity
ESD-R-25D-1 KEMET	NI-ZN TOROIDAL, WITH CASE AND TA	295
ESD-FPL-40-15 KEMET	NI-ZN FOR FLAT CABLE, BARE 34.8	188
ESD-R-783926H-NC21-BT KEMET	NANOCRYSTAL TROIDS WITH BASE 39.	15
ESD-SR-160G KEMET	FERRITE CORE HINGED 9MM GRY	0
ESD-R-31-P KEMET	MN-ZN TOROIDAL, COATED 19MM	36
ESD-R-38SR KEMET	MN-ZN FERRITE HIGH Z TROIDS/RING	74
ESD-R-12C KEMET	FERRITE CORE SOLID 7.3MM	4317
ESD-FPL-18.7-3 KEMET	NI-ZN FOR FLAT CABLE, BARE 15.0	1530
ESD-R-25S KEMET	FERRITE CORE SOLID 15MM	281
ESD-R-38D-B KEMET	FERRITE CORE CLAMP 17.9MM	230
ESD-R-47M-H KEMET	MN-ZN FERRITE TROIDS CASED 24.4M	0
ESD-R-57N-H KEMET	NI-ZN FERRITE TROIDS CASED 33.2M	15
ESD-R-19 KEMET	FERRITE CORE SOLID 9MM	449
ESD-R-38-P KEMET	MN-ZN TOROIDAL, COATED 18MM	71
ESD-R-15C-1 KEMET	FERRITE CORE SOLID 10.5MM	984
B-20L-48B-A KEMET	NI-ZN BEAD, COATED 2.4MM	71
B-20F-57 KEMET	FERRITE CORE SOLID 1.5MM	17
ESD-SR-S16 KEMET	FERRITE CORE HINGED 8MM	599
ESD-FPL-35-8 KEMET	NI-ZN FOR FLAT CABLE, BARE 30.0	560
ESD-R-31SR-P KEMET	MN-ZN FERRITE HIGH Z TROIDS COAT	0

Cable Ferrites

1. Overview

Cable Ferrites are passive electronic components designed to suppress high-frequency noise in cables, reducing electromagnetic interference (EMI) and radio-frequency interference (RFI). Constructed from ferrite materials, these components absorb electromagnetic energy and convert it into heat. With the rapid development of high-speed electronics and wireless communication systems, cable ferrites play a critical role in ensuring electromagnetic compatibility (EMC) across industries.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Split Core (Snap-on)	Easy installation without cable disassembly; moderate noise suppression	Consumer electronics power cables
Wound Type	Higher inductance through multiple turns; superior EMI filtering	Industrial motor drives
Flat Cable Ferrite	Low-profile design; optimized for ribbon cables	Computer peripheral cables
High-Frequency Ferrite	Effective at GHz frequencies; specialized material formulation	5G base station cables

3. Structure and Composition

Typical cable ferrites consist of a manganese-zinc (MnZn) or nickel-zinc (NiZn) ferrite core with polymer coating. Split-core designs use two interlocking halves with snap mechanisms, while wound types feature pre-molded toroidal cores. Advanced models integrate conductive elastomers for improved EMI absorption. The core material's permeability determines the operating frequency range and noise suppression efficiency.

4. Key Technical Specifications

Parameter	Description	Importance
Impedance (100MHz)	100 - 2500	Determines noise attenuation performance
Frequency Range	1MHz - 3GHz	Defines effective operation bandwidth
Temperature Stability	-40 C to +125 C	Ensures reliability in harsh environments
Cable Compatibility	2-15mm diameter	Installation flexibility

5. Application Fields

Consumer Electronics: Notebook chargers, HDMI cables, USB hubs
Industrial Equipment: PLC systems, CNC machine cabling
Telecommunications: Fiber optic transceivers, 5G small cells
Automotive: CAN bus systems, EV charging cables

6. Leading Manufacturers and Products

Manufacturer	Key Product	Features
TDK Corporation	DFE3D25E102MA2D	2500 @100MHz, 3GHz high-frequency performance
Murata Manufacturing	BLE21HG102MN1D	Compact 10.5 6.5mm size for automotive applications
Steward Components	28B2043-0A0	High-vibration resistance for industrial motors

7. Selection Guidelines

Key considerations include:

Match impedance to target noise frequency range
Verify mechanical compatibility with cable diameter
Select material type (MnZn for low frequencies, NiZn for high frequencies)
Assess environmental requirements (temperature, vibration)
Balance performance with cost constraints

8. Industry Trends

Current trends show: - Increasing demand for high-frequency (>6GHz) ferrites driven by 5G and IoT - Miniaturization for wearable device applications - Development of wideband ferrites with multi-octave frequency coverage - Growing adoption in EV charging systems (SAE J1772 compliance) - Integration with cable connectors for space-constrained designs