Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	CIGT252012LMR68MNE Samsung Electro-Mechanics	FIXED IND 680NH 3.56A 33MOHM SMD	0
	CIH03Q82NJNC Samsung Electro-Mechanics	FIXED IND 82NH 100MA 3.8OHM SMD	0
	CIH02T7N5HNC Samsung Electro-Mechanics	FIXED IND 7.5NH 140MA 1.7OHM SMD	0
	CIH10T47NJNC Samsung Electro-Mechanics	FIXED IND 47NH 400MA 770 MOHM	0
	CIG22H1R0MAE Samsung Electro-Mechanics	FIXED IND 1UH 1.8A 65 MOHM SMD	0
	CIH02T3N1SNC Samsung Electro-Mechanics	FIXED IND 3.1NH 200MA 900 MOHM	0
	CIG21W1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 1.05A 133 MOHM SMD	0
	CIH02T3N1BNC Samsung Electro-Mechanics	FIXED IND 3.1NH 200MA 900 MOHM	0
	CIH03Q8N2JNC Samsung Electro-Mechanics	FIXED IND 8.2NH 190MA 570 MOHM	0
	CIH05Q12NJNC Samsung Electro-Mechanics	FIXED IND 12NH 400MA 300MOHM SMD	0
	CIH03QR10JNC Samsung Electro-Mechanics	FIXED IND 100NH 90MA 4.3OHM SMD	0
	CIH03T10NJNC Samsung Electro-Mechanics	FIXED IND 10NH 150MA 630 MOHM	0
	CIH03Q3N6CNC Samsung Electro-Mechanics	FIXED IND 3.6NH 270MA 300 MOHM	0
	CIH02T2N0SNC Samsung Electro-Mechanics	FIXED IND 2NH 200MA 600MOHM SMD	0
	CIH02T2N6SNC Samsung Electro-Mechanics	FIXED IND 2.6NH 200MA 800 MOHM	0
	CIH02T1N5SNC Samsung Electro-Mechanics	FIXED IND 1.5NH 220MA 600 MOHM	0
	CIH05Q4N3SNC Samsung Electro-Mechanics	FIXED IND 4.3NH 700MA 180 MOHM	0
	CIH02T3N1CNC Samsung Electro-Mechanics	FIXED IND 3.1NH 200MA 900 MOHM	0
	CIGT201608GMR47MNE Samsung Electro-Mechanics	FIXED IND 470NH SMD	0
	CIH02T5N6HNC Samsung Electro-Mechanics	FIXED IND 5.6NH 140MA 1.5OHM 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