Fixed Inductors

Part Number	Description / PDF	Quantity
CIL10NR82KNC Samsung Electro-Mechanics	FIXED IND 820NH 35MA 2.1OHM SMD	0
CIGT201608LM1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 2.3A 72MOHM SMD	0
CIGT252007LM3R3MNC Samsung Electro-Mechanics	FIXED IND 3.3UH 1.1A 291 MOHM	0
CIH05T1N5SNC Samsung Electro-Mechanics	FIXED IND 1.5NH 300MA 130 MOHM	15500
CIL10J3R3KNC Samsung Electro-Mechanics	FIXED IND 3.3UH 15MA 1.55OHM SMD	0
CIL10NR33KNC Samsung Electro-Mechanics	FIXED IND 330NH 35MA 850MOHM SMD	0
CIGT201610LH2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH 1.8A 139 MOHM	131630
CIGT252008LM1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 3.1A 50MOHM SMD	2385
CIGT201610LHR47MNE Samsung Electro-Mechanics	FIXED IND 470NH 3.6A 33MOHM SMD	747
CIH05T6N8JNC Samsung Electro-Mechanics	FIXED IND 6.8NH 300MA 320 MOHM	27990
CIH10TR15JNC Samsung Electro-Mechanics	FIXED IND 150NH 250MA 1.2 OHM	1991
CIGT252008LMR24MNE Samsung Electro-Mechanics	FIXED IND 240NH 6A 16MOHM SMD	0
CIL10NR27KNC Samsung Electro-Mechanics	FIXED IND 270NH 50MA 800MOHM SMD	0
CIGW252010GL3R3MNE Samsung Electro-Mechanics	FIXED IND 3.3UH 1.8A 112 MOHM	0
CIG22H3R3MAE Samsung Electro-Mechanics	FIXED IND 3.3UH 1.1A 138 MOHM	0
CIL10NR33JNC Samsung Electro-Mechanics	FIXED IND 330NH 35MA 850MOHM SMD	0
CIGT201610LH1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 2.8A 57MOHM SMD	333
CIH05T56NJNC Samsung Electro-Mechanics	FIXED IND 56NH 180MA 1.4 OHM SMD	664
CIG22H1R2MAE Samsung Electro-Mechanics	FIXED IND 1.2UH 1.7A 65 MOHM SMD	0
CIGT252010EH1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 4.1A 30MOHM 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