Fixed Inductors

Part Number	Description / PDF	Quantity
HK160815NJ-T TAIYO YUDEN	FIXED IND 15NH 300MA 320 MOHM	12915
LHL10TB330K TAIYO YUDEN	FIXED IND 33UH 1.9A 78 MOHM TH	0
NRS6012T330MMGJ TAIYO YUDEN	FIXED IND 33UH 550MA 696 MOHM	0
LK10052R2K-TV TAIYO YUDEN	FIXED IND 2.2UH 20MA 1.15 OHM	0
NRH3012T2R2MN TAIYO YUDEN	FIXED IND 2.2UH 1.37A 90 MOHM	37154
HK212522NK-T TAIYO YUDEN	FIXED IND 22NH 300MA 500 MOHM	0
HKQ0603W82NJ-T TAIYO YUDEN	FIXED IND 82NH 110MA 3.5 OHM SMD	14500
LK1005R39M-TV TAIYO YUDEN	FIXED IND 390NH 20MA 410 MOHM	0
HK100522NJ-TV TAIYO YUDEN	FIXED IND 22NH 300MA 600 MOHM	4506
MBKK1608H1R0M TAIYO YUDEN	FIXED IND 1UH 1.15A 150 MOHM SMD	8336
HK212512NK-T TAIYO YUDEN	FIXED IND 12NH 300MA 350 MOHM	0
NRS6028T6R8MMGJ TAIYO YUDEN	FIXED IND 6.8UH 2.5A 55.9 MOHM	0
LBR2518T1R0M TAIYO YUDEN	FIXED IND 1UH 960MA 45 MOHM SMD	6268
NRS8030T1R5NJGJ TAIYO YUDEN	FIXED IND 1.5UH 5.3A 15.6 MOHM	980
LBR2012T4R7MV TAIYO YUDEN	FIXED IND 4.7UH 200MA 240 MOHM	5925
CBC3225T221KRV TAIYO YUDEN	FIXED IND 220UH 170MA 3.25 OHM	0
NS10145T5R6NNA TAIYO YUDEN	FIXED IND 5.6UH 4.45A 21 MOHM	0
MAKK2520H1R5M TAIYO YUDEN	FIXED IND 1.5UH 2.4A 78 MOHM SMD	18691
NR3015T3R3M TAIYO YUDEN	FIXED IND 3.3UH 1.23A 96 MOHM	4501
LBC2012T2R2MV TAIYO YUDEN	FIXED IND 2.2UH 430MA 330 MOHM	0

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