Ferrite Beads and Chips

Part Number	Description / PDF	Quantity
Z0805C121ASMST KEMET	SIGNAL LINE EMI FERRITE CHIP BEA	4000
B-06-RTF-25 KEMET	BEAD (LEAD), 40OHM, 5A	0
B-06-RTF-50 KEMET	BEAD (LEAD), 40OHM, 5A	0
Z0201C330CSMST KEMET	SIGNAL LINE EMI FERRITE CHIP BEA	15000
B-9 KEMET	BEAD (WINDING) 2.5A	500
Z0603C221BPWZT KEMET	POWER LINE HIGH IMPEDANCE FERRIT	3875
Z0805C101APMST KEMET	POWER LINE FERRITE CHIP BEAD 100	3876
Z0402C220CSMST KEMET	SIGNAL LINE EMI FERRITE CHIP BEA	10000
Z0603C300GPWZT KEMET	POWER LINE HIGH IMPEDANCE FERRIT	3690
B-01-A KEMET	BEAD (LEAD), 2OHM, 5A	548
Z0603C181CSMST KEMET	SIGNAL LINE EMI FERRITE CHIP BEA	4000
Z0201C220ASMST KEMET	SIGNAL LINE EMI FERRITE CHIP BEA	15000
Z0805C210BPWST KEMET	POWER LINE FERRITE CHIP BEAD 21,	2984
Z0603C560CSMST KEMET	SIGNAL LINE EMI FERRITE CHIP BEA	4000
Z0402C680APMST KEMET	POWER LINE FERRITE CHIP BEAD 68,	10000
Z0603C431CSMST KEMET	SIGNAL LINE EMI FERRITE CHIP BEA	4000
Z0603C152DSMST KEMET	SIGNAL LINE EMI FERRITE CHIP BEA	3975
Z0805C330APMST KEMET	FERRITE BEAD 33 OHM 0805	0
Z0402C102ASMST KEMET	SIGNAL LINE EMI FERRITE CHIP BEA	8890
Z0603C241CSMST KEMET	SIGNAL LINE EMI FERRITE CHIP BEA	4000

Ferrite Beads and Chips

1. Overview

Ferrite beads and chips are passive electronic components designed to suppress high-frequency noise in electrical circuits. Made from ferrite materials (iron oxide compounds), they act as low-pass filters by dissipating electromagnetic interference (EMI) as heat. Their importance in modern electronics lies in ensuring signal integrity, reducing radio-frequency interference (RFI), and complying with electromagnetic compatibility (EMC) standards. They are widely used in power supplies, communication systems, and high-speed digital circuits.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
High-Frequency Ferrite Beads	Optimized for GHz-range noise suppression, low core loss	5G transceivers, RF modules
Low-Frequency Ferrite Beads	Effective at MHz-range filtering, high impedance stability	Power supplies, motor drives
High-Current Chips	Designed for >1A applications, thermal stability	EV battery management systems
Multilayer Ferrite Chips	Stacked structure for broadband filtering	Smartphones, IoT devices

3. Structure and Composition

Typical construction includes:

Ferrite Core: Mn-Zn or Ni-Zn based ceramic material
Electrodes: Silver-palladium (AgPd) or copper-nickel (CuNi) terminations
Encapsulation: Epoxy or polymer coating for mechanical protection
Geometry: Available in cylindrical (beads) or rectangular (chips) formats

Advanced designs incorporate internal electrode layers to increase impedance density.

4. Key Technical Parameters

Parameter	Description	Importance
Impedance (Z)	100MHz @ 100 -10k	Determines noise suppression efficiency
Rated Current	100mA-10A	Affects circuit stability under load
Frequency Range	1MHz-10GHz	Defines operational bandwidth
DC Resistance (DCR)	0.1 -20	Impacts power loss and heating
Operating Temp.	-55 C to +150 C	Ensures reliability in extreme conditions

5. Application Areas

Consumer Electronics: Smartphones (camera module filtering), laptops (power line conditioning)
Automotive: EV charging systems (CAN bus noise suppression), ADAS sensors
Industrial: PLCs (programmable logic controllers), motor drives
Telecom: Base stations (RF front-end filtering), optical transceivers

6. Leading Manufacturers and Products

Manufacturer	Key Products	Specifications
Murata	BLSH series	0.7A, 600 @ 100MHz, EIA 0603
TDK	MMZ series	3.0A, 2200 @ 100MHz, EIA 1210
Coilcraft	0603LS series	1.5A, 500 @ 100MHz, 0.65mm height
W rth Elektronik	744300 series	2.0A, 1500 @ 100MHz, AEC-Q200 qualified

7. Selection Guidelines

Define frequency range: Choose Ni-Zn for >100MHz applications, Mn-Zn for low frequencies
Calculate current requirements: Select rated current 20% higher than maximum operating current
Impedance matching: Ensure Z 10 source/load impedance at target frequency
Package constraints: Prioritize chip format for space-limited PCB designs
Environmental factors: Consider temperature rating for automotive/industrial applications
Cost optimization: Balance performance needs with standard vs. high-end part pricing

8. Industry Trends

Key development directions include:

Miniaturization: Development of 0201/01005 chip sizes for wearable devices
High-frequency performance: Materials enabling stable operation beyond 10GHz
Integrated solutions: Combining ferrite beads with capacitors in single packages
Material innovation: Lead-free and low-temperature co-fired ceramic (LTCC) technologies
Automotive focus: AEC-Q qualified parts for EV/HEV power systems