Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	CIH03Q1N6SNC Samsung Electro-Mechanics	FIXED IND 1.6NH 410MA 130 MOHM	0
	CIH02T4N3SNC Samsung Electro-Mechanics	FIXED IND 4.3NH 180MA 1.2OHM SMD	0
	CIH03Q3N1SNC Samsung Electro-Mechanics	FIXED IND 3.1NH 270MA 300 MOHM	0
	CIGT201208EH2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH SMD	0
	CIH03T2N0SNC Samsung Electro-Mechanics	FIXED IND 2NH 200MA 220 MOHM SMD	0
	CIG21W3R3MNE Samsung Electro-Mechanics	FIXED IND 3.3UH 730MA 250 MOHM	0
	CIH05T82NJNC Samsung Electro-Mechanics	FIXED IND 82NH 100MA 1.6 OHM SMD	0
	CIH03U2N4BNC Samsung Electro-Mechanics	FIXED IND 2.4NH 700MA 180 MOHM	0
	CIH03T3N0SNC Samsung Electro-Mechanics	FIXED IND 3NH 200MA 270 MOHM SMD	0
	CIH02T9N1HNC Samsung Electro-Mechanics	FIXED IND 9.1NH 140MA 1.8OHM SMD	0
	CIH03T4N7CNC Samsung Electro-Mechanics	FIXED IND 4.7NH 200MA 400 MOHM	0
	CIH03T82NJNC Samsung Electro-Mechanics	FIXED IND 82NH 50MA 4 OHM SMD	0
	CIH02T3N4SNC Samsung Electro-Mechanics	FIXED IND 3.4NH 180MA 1.1OHM SMD	0
	CIH05T12NJNC Samsung Electro-Mechanics	FIXED IND 12NH 300MA 500 MOHM	0
	CIH05Q1N5SNC Samsung Electro-Mechanics	FIXED IND 1.5NH 1A 100MOHM SMD	0
	CIH02T0N8CNC Samsung Electro-Mechanics	FIXED IND 0.8NH 320MA 400 MOHM	0
	CIH02T2N1BNC Samsung Electro-Mechanics	FIXED IND 2.1NH 200MA 700 MOHM	0
	CIGT201608EM1R5MNE Samsung Electro-Mechanics	FIXED IND 1.5UH 2.1A 120MOHM SMD	0
	CIH03Q6N8JNC Samsung Electro-Mechanics	FIXED IND 6.8NH 190MA 550 MOHM	0
	CIH03Q3N0CNC Samsung Electro-Mechanics	FIXED IND 3NH 270MA 300 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