Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	CIG21L4R7MNE Samsung Electro-Mechanics	FIXED IND 4.7UH 750MA 260 MOHM	0
	CIGT201610UH2R2MUE Samsung Electro-Mechanics	FIXED IND 2.2UH 2.2A 130MOHM SMD	0
	CIGW201610GLR33MLE Samsung Electro-Mechanics	FIXED IND 330NH 5.5A 22MOHM SMD	0
	CIH03T47NJNC Samsung Electro-Mechanics	FIXED IND 47NH 50MA 2.8 OHM SMD	0
	CIH02T1N3SNC Samsung Electro-Mechanics	FIXED IND 1.3NH 250MA 600 MOHM	0
	CIH05QR18JNC Samsung Electro-Mechanics	FIXED IND 180NH 150MA 3.38 OHM	0
	CIGW404012GM4R7MLE Samsung Electro-Mechanics	FIXED IND 4.7UH SMD	0
	CIGW252010GLR33MNE Samsung Electro-Mechanics	FIXED IND 330NH 6.2A 16MOHM SMD	0
	CIH10T3N3SNC Samsung Electro-Mechanics	FIXED IND 3.3NH 800MA 120 MOHM	0
	CIH02T3N0BNC Samsung Electro-Mechanics	FIXED IND 3NH 200MA 800MOHM SMD	0
	CIH05T1N8SNC Samsung Electro-Mechanics	FIXED IND 1.8NH 300MA 140 MOHM	0
	CIH02T0N9CNC Samsung Electro-Mechanics	FIXED IND 0.9NH 320MA 400 MOHM	0
	CIGT201208UM1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH SMD	0
	CIH10TR12JNC Samsung Electro-Mechanics	FIXED IND 120NH 300MA 1.2 OHM	0
	CIG22L1R2MNE Samsung Electro-Mechanics	FIXED IND 1.2UH 1.5A 65 MOHM SMD	0
	CIH05T2N4CNC Samsung Electro-Mechanics	FIXED IND 2.4NH 300MA 160 MOHM	0
	CIH02T1N6SNC Samsung Electro-Mechanics	FIXED IND 1.6NH 220MA 600 MOHM	0
	CIH02T12NJNC Samsung Electro-Mechanics	FIXED IND 12NH 140MA 2.4OHM SMD	0
	CIH05Q15NJNC Samsung Electro-Mechanics	FIXED IND 15NH 400MA 400MOHM SMD	0
	CIH03T1N8CNC Samsung Electro-Mechanics	FIXED IND 1.8NH 200MA 190 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