Fixed Inductors

Image	Part Number	Description / PDF	Quantity
	LMLP07A7M6R8DTAS Elco (AVX)	FIXED IND 6.8UH 4.5A 60MOHM SMD	49
	AL12A08N0GTR Elco (AVX)	FIXED IND 8NH 4A 2.6 MOHM SMD	11
	AL01682N0JTS Elco (AVX)	FIXED IND 82NH 2.5A 9.4 MOHM SMD	0
	LMLP0202M150CTAR Elco (AVX)	FIXED IND 15UH 370MA 1.02 OHM	0
	LCCI0201S4N3GTAR Elco (AVX)	FIXED IND 4.3NH 350MA 400 MOHM	15000
	LCCI0603S3N3GTAR Elco (AVX)	FIXED IND 3.3NH 1A 130 MOHM SMD	4000
	LCCI0603S3N9GTAR Elco (AVX)	FIXED IND 3.9NH 1A 150 MOHM SMD	4000
	LMLP0808N2R0CTAS Elco (AVX)	FIXED IND 2UH 6.3A 9 MOHM SMD	0
	LMLP05A6M220DTAS Elco (AVX)	FIXED IND 22UH 1.5A 390MOHM SMD	2945
	LMLP0405M100DTAS Elco (AVX)	FIXED IND 10UH 1.2A 282MOHM SMD	1996
	LMLP04A4M330CTAS Elco (AVX)	FIXED IND 33UH 420MA 810 MOHM	0
	LMLP1313M3R3DTAS Elco (AVX)	FIXED IND 3.3UH 15A 9.2MOHM SMD	500
	LMLP04A4M100CTAS Elco (AVX)	FIXED IND 10UH 770MA 240MOHM SMD	4500
$L08054R7DEWTR\3$	L08054R7DEWTR\3 Elco (AVX)	FIXED IND 4.7NH 750MA 100 MOHM	0
	L06032R7CGSTR Elco (AVX)	FIXED IND 2.7NH 750MA 80 MOHM	1762
	LMLP06A6M220CTAR Elco (AVX)	FIXED IND 22UH 630MA 530 MOHM	0
	L0603100JGWTR Elco (AVX)	FIXED IND 10NH 300MA 450 MOHM	0
	LCCI0402S1N0GTAR Elco (AVX)	FIXED IND 1NH 1A 80 MOHM SMD	10000
	LMLP03B3M100CTAR Elco (AVX)	FIXED IND 10UH 710MA 230MOHM SMD	3840
	LMLP06B6M100CTAS Elco (AVX)	FIXED IND 10UH 1.4A 125MOHM SMD	2500

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