Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	CIL21Y5R6KNE Samsung Electro-Mechanics	FIXED IND 5.6UH 25MA 500MOHM SMD	0
	CIL21NR27MNE Samsung Electro-Mechanics	FIXED IND 270NH 250MA 300 MOHM	0
	CIL31NR15KNE Samsung Electro-Mechanics	FIXED IND 150NH 250MA 300 MOHM	0
	CIL21NR39KNE Samsung Electro-Mechanics	FIXED IND 390NH 200MA 400 MOHM	0
	CIH05T1N2CNC Samsung Electro-Mechanics	FIXED IND 1.2NH 300MA 120 MOHM	0
	CIH03T3N3CNC Samsung Electro-Mechanics	FIXED IND 3.3NH 200MA 300 MOHM	0
	CIH02T3N4CNC Samsung Electro-Mechanics	FIXED IND 3.4NH 180MA 1.1OHM SMD	0
	CIH02T3N6BNC Samsung Electro-Mechanics	FIXED IND 3.6NH 180MA 1.1OHM SMD	0
	CIH02T0N3BNC Samsung Electro-Mechanics	FIXED IND 0.3NH 350MA 200 MOHM	0
	CIGW160808XMR47SLC Samsung Electro-Mechanics	FIXED IND 470NH SMD	0
	CIH03Q3N5SNC Samsung Electro-Mechanics	FIXED IND 3.5NH 270MA 300 MOHM	0
	CIH03T6N8JNC Samsung Electro-Mechanics	FIXED IND 6.8NH 150MA 480 MOHM	0
	CIH02T3N9CNC Samsung Electro-Mechanics	FIXED IND 3.9NH 180MA 1.2OHM SMD	0
	CIH02T1N8CNC Samsung Electro-Mechanics	FIXED IND 1.8NH 200MA 600 MOHM	0
	CIH10T18NJNC Samsung Electro-Mechanics	FIXED IND 18NH 500MA 350 MOHM	0
	CIG32W1R0MNE Samsung Electro-Mechanics	FIXED IND 1UH 1.5A 60 MOHM SMD	0
	CIG10F1R5MNC Samsung Electro-Mechanics	FIXED IND 1.5UH 600MA 350 MOHM	0
	CIH03T2N0CNC Samsung Electro-Mechanics	FIXED IND 2NH 200MA 220 MOHM SMD	0
	CIH03Q27NJNC Samsung Electro-Mechanics	FIXED IND 27NH 140MA 1.9OHM SMD	0
	CIH03Q7N5JNC Samsung Electro-Mechanics	FIXED IND 7.5NH 190MA 610 MOHM	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