Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	CIH02T0N4CNC Samsung Electro-Mechanics	FIXED IND 0.4NH 350MA 200 MOHM	0
	CIH05Q4N7SNC Samsung Electro-Mechanics	FIXED IND 4.7NH 700MA 180 MOHM	0
	CIH02T3N2BNC Samsung Electro-Mechanics	FIXED IND 3.2NH 200MA 1OHM SMD	0
	CIH03Q0N8SNC Samsung Electro-Mechanics	FIXED IND 0.8NH 550MA 70MOHM SMD	0
	CIH02T3N5CNC Samsung Electro-Mechanics	FIXED IND 3.5NH 180MA 1.1OHM SMD	0
	CIH03Q6N2SNC Samsung Electro-Mechanics	FIXED IND 6.2NH 210MA 470 MOHM	0
	CIH05T6N2CNC Samsung Electro-Mechanics	FIXED IND 6.2NH 300MA 320 MOHM	0
	CIH02T0N2CNC Samsung Electro-Mechanics	FIXED IND 0.2NH 350MA 100 MOHM	0
	CIH05Q2N2SNC Samsung Electro-Mechanics	FIXED IND 2.2NH 900MA 120 MOHM	0
	CIH03Q3N7SNC Samsung Electro-Mechanics	FIXED IND 3.7NH 270MA 300 MOHM	0
	CIGT201610UH2R2SNE Samsung Electro-Mechanics	FIXED IND 2.2UH SMD	0
	CIGT201610UMR47MNE Samsung Electro-Mechanics	FIXED IND 470NH 3.6A 36MOHM SMD	0
	CIG10F2R2MNC Samsung Electro-Mechanics	FIXED IND 2.2UH 500MA 450 MOHM	0
	CIH10T3N9SNC Samsung Electro-Mechanics	FIXED IND 3.9NH 800MA 140 MOHM	0
	CIH03T3N0CNC Samsung Electro-Mechanics	FIXED IND 3NH 200MA 270 MOHM SMD	0
	CIGT201208EM1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 2.9A 60MOHM SMD	0
	CIH05Q91NJNC Samsung Electro-Mechanics	FIXED IND 91NH 200MA 1.32 OHM	0
	CIH02T1N7CNC Samsung Electro-Mechanics	FIXED IND 1.7NH 200MA 600 MOHM	0
	CIG21W1R5MNE Samsung Electro-Mechanics	FIXED IND 1.5UH 960MA 150 MOHM	0
	CIGT201210EM1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 2.3A 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