Fixed Inductors

Part Number	Description / PDF	Quantity
LK1005R12K-TV TAIYO YUDEN	FIXED IND 120NH 25MA 590 MOHM	0
MDKK3030T1R5MMV TAIYO YUDEN	FIXED IND 1.5UH 2.1A 100 MOHM	0
CBC2518T331MV TAIYO YUDEN	FIXED IND 330UH 65MA 15.99 OHM	0
CBC2518T150M TAIYO YUDEN	FIXED IND 15UH 500MA 845 MOHM	0
HK10054N3S-TV TAIYO YUDEN	FIXED IND 4.3NH 300MA 200 MOHM	0
HK1005R27J-T TAIYO YUDEN	FIXED IND 270NH 200MA 4.8 OHM	5541
NRS6012T100MMGJ TAIYO YUDEN	FIXED IND 10UH 1.2A 240 MOHM SMD	76
LB2518T6R8MV TAIYO YUDEN	FIXED IND 6.8UH 195MA 195 MOHM	0
BRC2016T150M TAIYO YUDEN	FIXED IND 15UH 410MA 600 MOHM	0
LBC2016T1R0MV TAIYO YUDEN	FIXED IND 1UH 690MA 100 MOHM SMD	0
LBC2016T220M TAIYO YUDEN	FIXED IND 22UH 165MA 1.8 OHM SMD	0
CBL2012T220M TAIYO YUDEN	FIXED IND 22UH 250MA 2.73 OHM	3652
NR6020T3R3N TAIYO YUDEN	FIXED IND 3.3UH 2.6A 48 MOHM SMD	40422
LBC2016T220K TAIYO YUDEN	FIXED IND 22UH 165MA 1.8 OHM SMD	0
LB2016T6R8M TAIYO YUDEN	FIXED IND 6.8UH 200MA 350 MOHM	2633
LBC2518T681M TAIYO YUDEN	FIXED IND 680UH 45MA 28 OHM SMD	0
LB2518T2R2MV TAIYO YUDEN	FIXED IND 2.2UH 340MA 90 MOHM	0
NRV3012T1R0NV TAIYO YUDEN	FIXED IND 1UH 1.97A 65 MOHM SMD	2018
LK1005R68M-TV TAIYO YUDEN	FIXED IND 680NH 20MA 550 MOHM	0
BRL2518T1R0M TAIYO YUDEN	FIXED IND 1UH 1A 104 MOHM SMD	37

Fixed Inductors

1. Overview

Fixed inductors are passive electronic components designed to store energy in magnetic fields when electrical current flows through them. Unlike variable inductors, their inductance values remain constant during operation. These components play critical roles in filtering, signal processing, energy storage, and electromagnetic interference (EMI) suppression across modern electronics, including power supplies, communication systems, and automotive electronics.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Wirewound Inductors	High precision, high current handling, low resistance	Power supplies, DC-DC converters
Chip Inductors	Compact SMD package, stable performance at high frequencies	Mobile devices, RF circuits
Ferrite Bead Inductors	Effective high-frequency noise suppression	EMI filtering in digital circuits
Thin-Film Inductors	Ultra-compact, high Q-factor, tight tolerance	5G communication modules, IoT devices

3. Structure and Composition

Typical fixed inductors consist of:

Magnetic Core: Made from ferrite, powdered iron, or composite materials to concentrate magnetic flux
Coil Structure: Copper wire wound around the core (enamelled or silver-plated)
Encapsulation: Molded resin or ceramic coating for mechanical protection and insulation
Terminations: Solder-coated ends for PCB mounting (for SMD types) or leaded connections

4. Key Technical Specifications

Parameter	Description	Importance
Inductance (L)	Measured in henrys (H), determines energy storage capacity	Defines filtering/energy storage performance
Rated Current (I_rated)	Maximum DC current before saturation	Prevents core saturation and failure
DC Resistance (DCR)	Resistance of coil windings	Affects efficiency and thermal performance
Self-Resonant Frequency (SRF)	Frequency where inductor behaves as capacitor	Limits effective operating frequency range
Q Factor	Quality factor indicating efficiency	Higher Q = lower energy losses

5. Application Fields

Consumer Electronics: Smartphones, laptops, LED drivers
Industrial Equipment: Motor drives, power inverters
Automotive Systems: ECU modules, EV battery management
Telecom Infrastructure: Base station filters, optical transceivers

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Murata	LQH3NPN100M	10 H, 1.2A, 1.8 1.4mm chip inductor
TDK	MLZ2012A100T	100MHz SRF, 1.0 1.25mm for RF circuits
Vishay	IHLP2525CZER1R0M	1 H, 12A, composite construction
Coilcraft	0402DC-103J	10 H, 5% tolerance, ultra-low profile

7. Selection Guidelines

Key considerations during selection:

Calculate required inductance based on switching frequency and ripple current
Verify rated current exceeds maximum operating current by 20-30%
Select SRF higher than circuit operating frequency
Consider package size vs. thermal dissipation requirements
For EMI suppression: Choose ferrite beads with impedance curves matching target frequencies

8. Industry Trends

Current development trends include:

Miniaturization: Sub-0.5mm size inductors for wearable devices
High-Frequency Operation: Components supporting >10GHz 5G applications
Integrated Solutions: Combined inductor-filter modules
Material Innovation: Nanocrystalline cores for higher saturation flux
Automotive Focus: AEC-Q qualified parts for EV/HEV systems