Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	CIH03Q1N7SNC Samsung Electro-Mechanics	FIXED IND 1.7NH 410MA 130 MOHM	0
	CIG10W1R5MNC Samsung Electro-Mechanics	FIXED IND 1.5UH 800MA 250 MOHM	0
	CIH02T10NJNC Samsung Electro-Mechanics	FIXED IND 10NH 140MA 2.1OHM SMD	0
	CIH03T1N2CNC Samsung Electro-Mechanics	FIXED IND 1.2NH 250MA 140 MOHM	0
	CIH02T1N9BNC Samsung Electro-Mechanics	FIXED IND 1.9NH 200MA 600 MOHM	0
	CIGT252008LM2R2SNE Samsung Electro-Mechanics	FIXED IND 2.2UH SMD	0
	CIH03T1N3SNC Samsung Electro-Mechanics	FIXED IND 1.3NH 250MA 140 MOHM	0
	CIGT201210UMR47MNE Samsung Electro-Mechanics	FIXED IND 470NH 3.3A 40MOHM SMD	0
	CIH02T2N9SNC Samsung Electro-Mechanics	FIXED IND 2.9NH 200MA 800 MOHM	0
	CIH03T8N2JNC Samsung Electro-Mechanics	FIXED IND 8.2NH 150MA 550 MOHM	0
	CIH03Q1N3SNC Samsung Electro-Mechanics	FIXED IND 1.3NH 420MA 120 MOHM	0
	CIGT201210UH2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH SMD	0
	CIH02T5N1SNC Samsung Electro-Mechanics	FIXED IND 5.1NH 160MA 1.4OHM SMD	0
	CIG21FR47MNC Samsung Electro-Mechanics	FIXED IND 470NH 1.1A 120 MOHM	0
	CIGT201608EM1R0SNE Samsung Electro-Mechanics	FIXED IND 1UH SMD	0
	CIGT201206UM1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 1.5A 184MOHM SMD	0
	CIH02T3N6CNC Samsung Electro-Mechanics	FIXED IND 3.6NH 180MA 1.1OHM SMD	0
	CIH03Q68NJNC Samsung Electro-Mechanics	FIXED IND 68NH 110MA 3.3OHM SMD	0
	CIH02T2N2BNC Samsung Electro-Mechanics	FIXED IND 2.2NH 200MA 800 MOHM	0
	CIH03Q0N6SNC Samsung Electro-Mechanics	FIXED IND 0.6NH 600MA 60MOHM 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