Ferrite Beads and Chips

Part Number	Description / PDF	Quantity
MMZ1608R102CTA00 TDK Corporation	FERRITE BEAD 1 KOHM 0603 1LN	0
MMZ1608D800CTAH0 TDK Corporation	FERRITE BEAD 80 OHM 0603 1LN	0
MMZ1005F330CT000 TDK Corporation	FERRITE BEAD 33 OHM 0402 1LN	0
MMZ1005F330CTD25 TDK Corporation	FERRITE BEAD 33 OHM 0402 1LN	0
MMZ1608B121CTDH5 TDK Corporation	FERRITE BEAD 120 OHM 0603 1LN	7278
MPZ1608S471ATD25 TDK Corporation	FERRITE BEAD 470 OHM 0603 1LN	66751
MMZ1608S400ATA00 TDK Corporation	FERRITE BEAD 40 OHM 0603 1LN	66388
MPZ2012S101ATD25 TDK Corporation	FERRITE BEAD 100 OHM 0805 1LN	0
MMZ1005D220CT000 TDK Corporation	FERRITE BEAD 22 OHM 0402 1LN	2680
HF50ACC201209-T TDK Corporation	FERRITE BEAD 11 OHM 0805 1LN	102
MMZ1005Y182CT000 TDK Corporation	FERRITE BEAD 1.8 KOHM 0402 1LN	29480
MMZ1005D121ET000 TDK Corporation	FERRITE BEAD 120 OHM 0402 1LN	12552
MMZ1608S400ATD25 TDK Corporation	FERRITE BEAD 40 OHM 0603 1LN	802
MMZ1005Y471CTD25 TDK Corporation	FERRITE BEAD 470 OHM 0402 1LN	0
HF30ACB453215-T TDK Corporation	FERRITE BEAD 70 OHM 1812 1LN	3000
MMZ2012D301BTD25 TDK Corporation	FERRITE BEAD 300 OHM 0805 1LN	3878
MMZ1005D100CTD25 TDK Corporation	FERRITE BEAD 10 OHM 0402 1LN	3037
KMZ1608DHR241CTD25 TDK Corporation	FERRITE BEAD 240 OHM 0603 1LN	5318
MMZ1608S800CTAH0 TDK Corporation	FERRITE BEAD 80 OHM 0603 1LN	2440
MMZ2012Y300BT000 TDK Corporation	FERRITE BEAD 30 OHM 0805 1LN	25029

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