Fixed Inductors

Part Number	Description / PDF	Quantity
CIG22HR56MAE Samsung Electro-Mechanics	FIXED IND 560NH 2A 55 MOHM SMD	0
CIL10S270KNC Samsung Electro-Mechanics	FIXED IND 27UH 1MA 2.75OHM SMD	0
CIH03Q18NJNC Samsung Electro-Mechanics	FIXED IND 18NH 140MA 1.05 OHM	101630
CIG10W2R2MNC Samsung Electro-Mechanics	FIXED IND 2.2UH 750MA 300 MOHM	0
CIG22BR33MNE Samsung Electro-Mechanics	FIXED IND 330NH 1.7A 47 MOHM SMD	0
CIH05T22NJNC Samsung Electro-Mechanics	FIXED IND 22NH 250MA 800 MOHM	1338
CIGT201608LMR47MNE Samsung Electro-Mechanics	FIXED IND 470NH 3.3A 41 MOHM SMD	0
CIGT201610UL2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH 2A 130MOHM SMD	0
CIL10NR18KNC Samsung Electro-Mechanics	FIXED IND 180NH 50MA 600MOHM SMD	0
CIGW252010GL2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH 2.2A 93MOHM SMD	0
CIGT201610EH2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH 2.5A 87MOHM SMD	6002
CIGT252010LMR33MNE Samsung Electro-Mechanics	FIXED IND 330NH 5A 22MOHM SMD	939
CIGT252010LM1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 3.1A 50MOHM SMD	0
CIGT201608LMR68MNE Samsung Electro-Mechanics	FIXED IND 680NH 2.9A 53 MOHM SMD	0
CIH10T27NJNC Samsung Electro-Mechanics	FIXED IND 27NH 500MA 450 MOHM	7420
CIGW201610GL4R7MLE Samsung Electro-Mechanics	FIXED IND 4.7UH 1.4A 240MOHM SMD	0
CIL10J2R7KNC Samsung Electro-Mechanics	FIXED IND 2.7UH 15MA 1.35OHM SMD	0
CIH03T15NJNC Samsung Electro-Mechanics	FIXED IND 15NH 100MA 800 MOHM	4475
CIGT201610LHR24MNE Samsung Electro-Mechanics	FIXED IND 240NH 4.7A 19MOHM SMD	116699
CIL10J3R9KNC Samsung Electro-Mechanics	FIXED IND 3.9UH 15MA 1.7OHM SMD	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