Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	CIG22B2R2MLE Samsung Electro-Mechanics	FIXED IND 2.2UH 900MA 170 MOHM	0
	CIH02T1N9CNC Samsung Electro-Mechanics	FIXED IND 1.9NH 200MA 600 MOHM	0
	CIH03Q5N1CNC Samsung Electro-Mechanics	FIXED IND 5.1NH 220MA 440 MOHM	0
	CIH02T2N5SNC Samsung Electro-Mechanics	FIXED IND 2.5NH 200MA 800 MOHM	0
	CIG22ER50SNE Samsung Electro-Mechanics	FIXED IND 500NH SMD	0
	CIH02T0N7CNC Samsung Electro-Mechanics	FIXED IND 0.7NH 320MA 400 MOHM	0
	CIH10T1N0SNC Samsung Electro-Mechanics	FIXED IND 1NH 800MA 50 MOHM SMD	0
	CIH10T22NJNC Samsung Electro-Mechanics	FIXED IND 22NH 500MA 400 MOHM	0
	CIH05T4N7CNC Samsung Electro-Mechanics	FIXED IND 4.7NH 300MA 240 MOHM	0
	CIH03Q3N8SNC Samsung Electro-Mechanics	FIXED IND 3.8NH 270MA 300 MOHM	0
	CIH02T3N7BNC Samsung Electro-Mechanics	FIXED IND 3.7NH 180MA 1.1OHM SMD	0
	CIH03T1N2SNC Samsung Electro-Mechanics	FIXED IND 1.2NH 250MA 140 MOHM	0
	CIGT201208EM1R0SNE Samsung Electro-Mechanics	FIXED IND 1UH SMD	0
	CIG10W4R7MNC Samsung Electro-Mechanics	FIXED IND 4.7UH 620MA 500 MOHM	0
	CIH05Q2N4SNC Samsung Electro-Mechanics	FIXED IND 2.4NH 800MA 150 MOHM	0
	CIH02T2N5CNC Samsung Electro-Mechanics	FIXED IND 2.5NH 200MA 800 MOHM	0
	CIH02T6N2SNC Samsung Electro-Mechanics	FIXED IND 6.2NH 140MA 1.5OHM SMD	0
	CIH05Q82NJNC Samsung Electro-Mechanics	FIXED IND 82NH 200MA 1.2 OHM SMD	0
	CIH03T2N4SNC Samsung Electro-Mechanics	FIXED IND 2.4NH 200MA 250 MOHM	0
	CIH05QR22JNC Samsung Electro-Mechanics	FIXED IND 220NH 120MA 3.77 OHM	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