Fixed Inductors

Part Number	Description / PDF	Quantity
CIL10N56NKNC Samsung Electro-Mechanics	FIXED IND 56NH 50MA 300MOHM SMD	0
CIL10NR56JNC Samsung Electro-Mechanics	FIXED IND 560NH 35MA 1.55OHM SMD	0
CIH05T39NJNC Samsung Electro-Mechanics	FIXED IND 39NH 200MA 1.2 OHM SMD	3899
CIG21W2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH 810MA 200 MOHM	296
CIL10N47NKNC Samsung Electro-Mechanics	FIXED IND 47NH 50MA 300MOHM SMD	0
CIGT201610UM1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 3.1A 57MOHM SMD	0
CIL10Y8R2KNC Samsung Electro-Mechanics	FIXED IND 8.2UH 5MA 2.1OHM SMD	0
CIL10J1R2KNC Samsung Electro-Mechanics	FIXED IND 1.2UH 25MA 800MOHM SMD	0
CIH03T3N3SNC Samsung Electro-Mechanics	FIXED IND 3.3NH 200MA 300 MOHM	39675
CIL10NR12KNC Samsung Electro-Mechanics	FIXED IND 120NH 50MA 500MOHM SMD	0
CIG21L2R2MNE Samsung Electro-Mechanics	FIXED IND 2.2UH 950MA 160 MOHM	1000
CIG22B1R0MAE Samsung Electro-Mechanics	FIXED IND 1UH 1.3A 110 MOHM SMD	0
CIGT2016R6MH100MNE Samsung Electro-Mechanics	FIXED IND 10UH 450MA 1.4OHM SMD	0
CIH03T3N9SNC Samsung Electro-Mechanics	FIXED IND 3.9NH 200MA 300 MOHM	750
CIL10NR56KNC Samsung Electro-Mechanics	FIXED IND 560NH 35MA 1.55OHM SMD	0
CIGW201610GH1R0MLE Samsung Electro-Mechanics	FIXED IND 1UH 2.7A 54MOHM SMD	0
CIGT252012LM1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 3.4A 40MOHM SMD	0
CIGT252010LMR68MNE Samsung Electro-Mechanics	FIXED IND 680NH 3.3A 45MOHM SMD	625
CIGW252010EH4R7MNE Samsung Electro-Mechanics	FIXED IND 4.7UH 1.4A 150 MOHM	3157
CIG22H1R5MNE Samsung Electro-Mechanics	FIXED IND 1.5UH 1.5A 104 MOHM	48

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