Fixed Inductors

Image	Part Number	Description / PDF	Quantity
	LCCI0402S1N5GTAR Elco (AVX)	FIXED IND 1.5NH 1A 100 MOHM SMD	10000
	LCCI0402JR15GTAR Elco (AVX)	FIXED IND 150NH 140MA 3.2 OHM	0
$L08055R6DEWTR\500$	L08055R6DEWTR\500 Elco (AVX)	FIXED IND 5.6NH 750MA 100 MOHM	0
	LCCI0201S2N2GTAR Elco (AVX)	FIXED IND 2.2NH 450MA 220 MOHM	15000
$L02011R0AHSTR\500$	L02011R0AHSTR\500 Elco (AVX)	FIXED IND 1NH 400MA 200 MOHM SMD	6580
	LMLP07C7M330DTAS Elco (AVX)	FIXED IND 33UH 2A 200MOHM SMD	700
	LMXS131JM470FTAS Elco (AVX)	FIXED IND 47UH 2.7A 64 MOHM SMD	0
	LCCI0402J10NGTAR Elco (AVX)	FIXED IND 10NH 500MA 300 MOHM	0
	LMLP04B4N3R3CTAS Elco (AVX)	FIXED IND 3.3UH 1.23A 70 MOHM	0
	L06031R5CGSTR Elco (AVX)	FIXED IND 1.5NH 1A 60 MOHM SMD	3557
	LMLP0707M6R8DTAS Elco (AVX)	FIXED IND 6.8UH 4A 73MOHM SMD	14901500
	LMLP07A7M1R5DTAS Elco (AVX)	FIXED IND 1.5UH 9A 15MOHM SMD	945
	AS0608N9JTR Elco (AVX)	FIXED IND 8.9NH 2.9A 7 MOHM SMD	0
	LMXN1310M680CTAS Elco (AVX)	FIXED IND 68UH 220 MOHM SMD	0
	LCCI0201S4N7GTAR Elco (AVX)	FIXED IND 4.7NH 350MA 400 MOHM	15000
	LMLP06A6M470CTAR Elco (AVX)	FIXED IND 47UH 460MA 1.05 OHM	0
	L06033R9CGSTR Elco (AVX)	FIXED IND 3.9NH 500MA 120 MOHM	13822
	LMLP05A6M1R2DTAS Elco (AVX)	FIXED IND 1.2UH 6.2A 28MOHM SMD	2994
	LMLP07B7MR60DTAS Elco (AVX)	FIXED IND 600NH 13A 6.9MOHM SMD	1500
	LMXN0605M330DTAS Elco (AVX)	FIXED IND 33UH 880MA 230 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