Fixed Inductors

Part Number	Description / PDF	Quantity
HK06032N2S-TV TAIYO YUDEN	FIXED IND 2.2NH 360MA 190 MOHM	14748
LHL10NB470K TAIYO YUDEN	FIXED IND 47UH 1.7A 93 MOHM TH	0
CBC3225T100MR TAIYO YUDEN	FIXED IND 10UH 900MA 172.9 MOHM	113936
NS12555T221MNV TAIYO YUDEN	FIXED IND 220UH 1.18A 324 MOHM	0
HKQ040224NJ-T TAIYO YUDEN	FIXED IND 24NH 120MA 2.23 OHM	0
NRS5020T4R7MMGJV TAIYO YUDEN	FIXED IND 4.7UH 2A 72 MOHM SMD	4446
NR4018T220M TAIYO YUDEN	FIXED IND 22UH 590MA 432 MOHM	64849
BRFL2518T2R2M TAIYO YUDEN	FIXED IND 2.2UH 950MA 169 MOHM	0
AQ1057N5J-T TAIYO YUDEN	FIXED IND 7.5NH 490MA 250 MOHM	0
EST1060T331MDGA TAIYO YUDEN	FIXED IND 330UH 750MA 550 MOHM	0
NS12555T681MNV TAIYO YUDEN	FIXED IND 680UH 610MA 1.044OHM	0
LBM2016T1R8JV TAIYO YUDEN	FIXED IND 1.8UH 345MA 624 MOHM	0
LHL10NB680K TAIYO YUDEN	FIXED IND 68UH 1.5A 120 MOHM TH	0
NRS4010T3R3MDGG TAIYO YUDEN	FIXED IND 3.3UH 1.4A 120 MOHM	0
NRV2012T4R7MGF TAIYO YUDEN	FIXED IND 4.7UH 750MA 390 MOHM	1026
NRS5010T4R7MMGF TAIYO YUDEN	FIXED IND 4.7UH 1.39A 174 MOHM	880
CK21254R7M-T TAIYO YUDEN	FIXED IND 4.7UH 120MA 480 MOHM	1996
NRS4012T1R0NDGG TAIYO YUDEN	FIXED IND 1UH 2.2A 50.4 MOHM SMD	0
LBC2518T471MV TAIYO YUDEN	FIXED IND 470UH 50MA 28.6 OHM	0
LK16081R0K-T TAIYO YUDEN	FIXED IND 1UH 40MA 600 MOHM SMD	43820

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