Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	CIH03Q1N2SNC Samsung Electro-Mechanics	FIXED IND 1.2NH 420MA 120 MOHM	0
	CIG22H4R7MNE Samsung Electro-Mechanics	FIXED IND 4.7UH 800MA 233 MOHM	0
	CIH02T3N5BNC Samsung Electro-Mechanics	FIXED IND 3.5NH 180MA 1.1OHM SMD	0
	CIH02T2N4SNC Samsung Electro-Mechanics	FIXED IND 2.4NH 200MA 800 MOHM	0
	CIGT201610UH2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH 2.2A 130MOHM SMD	0
	CIH02T1N6CNC Samsung Electro-Mechanics	FIXED IND 1.6NH 220MA 600 MOHM	0
	CIGT160806UM1R0MNC Samsung Electro-Mechanics	FIXED IND 1UH 1A 125MOHM SMD	0
	CIH03Q2N4CNC Samsung Electro-Mechanics	FIXED IND 2.4NH 330MA 200 MOHM	0
	CIGT201608UMR47MNE Samsung Electro-Mechanics	FIXED IND 470NH SMD	0
	CIGT201210UMR24MNE Samsung Electro-Mechanics	FIXED IND 240NH SMD	0
	CIH05QR27JNC Samsung Electro-Mechanics	FIXED IND 270NH 110MA 4.94 OHM	0
	CIH03Q2N0SNC Samsung Electro-Mechanics	FIXED IND 2NH 330MA 200 MOHM SMD	0
	CIH02T2N3CNC Samsung Electro-Mechanics	FIXED IND 2.3NH 200MA 800 MOHM	0
	CIH03Q2N9SNC Samsung Electro-Mechanics	FIXED IND 2.9NH 310MA 220 MOHM	0
	CIH05Q5N6SNC Samsung Electro-Mechanics	FIXED IND 5.6NH 600MA 200 MOHM	0
	CIH02T1N9SNC Samsung Electro-Mechanics	FIXED IND 1.9NH 200MA 600 MOHM	0
	CIH05T4N3CNC Samsung Electro-Mechanics	FIXED IND 4.3NH 300MA 240 MOHM	0
	CIH02T3N6SNC Samsung Electro-Mechanics	FIXED IND 3.6NH 180MA 1.1OHM SMD	0
	CIH02T3N7CNC Samsung Electro-Mechanics	FIXED IND 3.7NH 180MA 1.1OHM SMD	0
	CIH02T0N6CNC Samsung Electro-Mechanics	FIXED IND 0.6NH 320MA 300 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