Fixed Inductors

Part Number	Description / PDF	Quantity
CIH03Q3N3CNC Samsung Electro-Mechanics	FIXED IND 3.3NH 270MA 300 MOHM	8268
CIG22H1R5MAE Samsung Electro-Mechanics	FIXED IND 1.5UH 1.5A 74 MOHM SMD	0
CIGW201610GH4R7MLE Samsung Electro-Mechanics	FIXED IND 4.7UH 1.1A 279 MOHM	113631
CIH10TR10JND Samsung Electro-Mechanics	FIXED IND 100NH 350MA 1OHM SMD	0
CIGW252010GL1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 3.3A 40MOHM SMD	3134
CIG22E1R0SNE Samsung Electro-Mechanics	FIXED INDUCTOR 1UH	0
CIG22B1R5MNE Samsung Electro-Mechanics	FIXED IND 1.5UH 1.15A 148 MOHM	0
CIG21L1R5MNE Samsung Electro-Mechanics	FIXED IND 1.5UH 1.05A 140 MOHM	3159
CIG22B1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 1.2A 125 MOHM SMD	1481
CIG22E2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH 1.3A 150 MOHM	0
CIH10T8N2JNC Samsung Electro-Mechanics	FIXED IND 8.2NH 700MA 240 MOHM	7004
CIGT252008LHR47MNE Samsung Electro-Mechanics	FIXED IND 470NH 4.2A 29MOHM SMD	86205
CIG22B4R7MAE Samsung Electro-Mechanics	FIXED IND 4.7UH 800MA 280 MOHM	0
CIGW404012GMR47MLE Samsung Electro-Mechanics	FIXED IND 470NH 6A 17MOHM SMD	0
CIGT201206EH1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 1.8A 110MOHM SMD	5571
CIGT252008LMR33MNE Samsung Electro-Mechanics	FIXED IND 330NH 4.3A 26MOHM SMD	0
CIGW201610GHR47MLE Samsung Electro-Mechanics	FIXED IND 470NH 3.6A 32MOHM SMD	1750
CIH05T6N2SNC Samsung Electro-Mechanics	FIXED IND 6.2NH 300MA 320 MOHM	230
CIGT201610EHR47MNE Samsung Electro-Mechanics	FIXED IND 470NH 4.8A 22MOHM SMD	113880
CIG10FR47MNC Samsung Electro-Mechanics	FIXED IND 470NH 800MA 200 MOHM	12

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