Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	CIG21F1R0MNC Samsung Electro-Mechanics	FIXED IND 1UH 800MA 190 MOHM SMD	0
	CIH10T5N6SNC Samsung Electro-Mechanics	FIXED IND 5.6NH 800MA 180 MOHM	0
	CIH10T33NJNC Samsung Electro-Mechanics	FIXED IND 33NH 500MA 550 MOHM	0
	CIH03Q2N5SNC Samsung Electro-Mechanics	FIXED IND 2.5NH 310MA 220 MOHM	0
	CIH03U1N5BNC Samsung Electro-Mechanics	FIXED IND 1.5NH 800MA 100 MOHM	0
	CIH02T3N7SNC Samsung Electro-Mechanics	FIXED IND 3.7NH 180MA 1.1OHM SMD	0
	CIH02T0N9BNC Samsung Electro-Mechanics	FIXED IND 0.9NH 320MA 400 MOHM	0
	CIGW404012GM1R0MLE Samsung Electro-Mechanics	FIXED IND 1UH 4.8A 25MOHM SMD	0
	CIG22B3R3MNE Samsung Electro-Mechanics	FIXED IND 3.3UH 1.05A 216 MOHM	0
	CIH05T7N5JNC Samsung Electro-Mechanics	FIXED IND 7.5NH 300MA 370 MOHM	0
	CIH05T5N6CNC Samsung Electro-Mechanics	FIXED IND 5.6NH 300MA 270 MOHM	0
	CIH02T3N3BNC Samsung Electro-Mechanics	FIXED IND 3.3NH 180MA 1.1OHM SMD	0
	CIH02T2N2CNC Samsung Electro-Mechanics	FIXED IND 2.2NH 200MA 800 MOHM	0
	CIH02T4N0SNC Samsung Electro-Mechanics	FIXED IND 4NH 180MA 1.2OHM SMD	0
	CIGT201208UM1R5MNE Samsung Electro-Mechanics	FIXED IND 1.5UH SMD	0
	CIG22H2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH 1.2A 116 MOHM	0
	CIH03Q2N2SNC Samsung Electro-Mechanics	FIXED IND 2.2NH 330MA 200 MOHM	0
	CIH03T1N3CNC Samsung Electro-Mechanics	FIXED IND 1.3NH 250MA 140 MOHM	0
	CIGT201608UMR24MNE Samsung Electro-Mechanics	FIXED IND 240NH SMD	0
	CIH05Q3N0SNC Samsung Electro-Mechanics	FIXED IND 3NH 800MA 170 MOHM 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