Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	CIH03T18NJNC Samsung Electro-Mechanics	FIXED IND 18NH 100MA 900 MOHM	0
	CIH03Q3N3SNC Samsung Electro-Mechanics	FIXED IND 3.3NH 270MA 300 MOHM	0
	CIH10T2N7SNC Samsung Electro-Mechanics	FIXED IND 2.7NH 800MA 100 MOHM	0
	CIH05T10NJNC Samsung Electro-Mechanics	FIXED IND 10NH 300MA 420 MOHM	0
	CIH02T15NJNC Samsung Electro-Mechanics	FIXED IND 15NH 140MA 2.6OHM SMD	0
	CIGW252010GM1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 3.5A 52MOHM SMD	0
	CIH05QR10JNC Samsung Electro-Mechanics	FIXED IND 100NH 200MA 1.35 OHM	0
	CIH03Q47NJNC Samsung Electro-Mechanics	FIXED IND 47NH 120MA 2.6OHM SMD	0
	CIH03Q3N6SNC Samsung Electro-Mechanics	FIXED IND 3.6NH 270MA 300 MOHM	0
	CIH03Q15NJNC Samsung Electro-Mechanics	FIXED IND 15NH 150MA 890 MOHM	0
	CIG22L3R3MNE Samsung Electro-Mechanics	FIXED IND 3.3UH 1.2A 100 MOHM	0
	CIH02T6N8HNC Samsung Electro-Mechanics	FIXED IND 6.8NH 140MA 1.6OHM SMD	0
	CIH02T8N2HNC Samsung Electro-Mechanics	FIXED IND 8.2NH 140MA 1.8OHM SMD	0
	CIH03T39NJNC Samsung Electro-Mechanics	FIXED IND 39NH 50MA 2.4 OHM SMD	0
	CIH02T3N3CNC Samsung Electro-Mechanics	FIXED IND 3.3NH 180MA 1.1OHM SMD	0
	CIH03Q2N8SNC Samsung Electro-Mechanics	FIXED IND 2.8NH 310MA 220 MOHM	0
	CIGT201210UMR68MNE Samsung Electro-Mechanics	FIXED IND 680NH SMD	0
	CIH05T47NJNC Samsung Electro-Mechanics	FIXED IND 47NH 200MA 1.3 OHM SMD	0
	CIH02T0N2BNC Samsung Electro-Mechanics	FIXED IND 0.2NH 350MA 100 MOHM	0
	CIH02T3N8CNC Samsung Electro-Mechanics	FIXED IND 3.8NH 180MA 1.1OHM 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