Fixed Inductors

Part Number	Description / PDF	Quantity
AMPLA7050S-5R6MT Abracon	FIXED IND 5.6UH 6A 49 MOHM SMD	0
AMDLA4530S-1R5MT Abracon	IND 1.5UH 6.3A 21MOHM SMD	0
ASPIAIG-F1040-R39M-T Abracon	FIXED IND 390NH 30A 1.3 MOHM SMD	1000
AIRD-02-470K Abracon	FIXED IND 47UH 5.5A 35 MOHM TH	14
AIUR-16-182K Abracon	FIXED IND 1.8MH 120MA 5.7 OHM TH	0
AMPLA1707Q-4R7MT Abracon	FIXED IND 4.7UH 25A 5.5 MOHM SMD	0
AMPLA1004S-R30MT Abracon	FIXED IND 300NH 32A 1.1 MOHM SMD	0
AIML-1206-2R7K-T Abracon	FIXED IND 2.7UH 50MA 550 MOHM	0
ATCA-03-151M-V Abracon	FIXED IND 150UH 1A 159 MOHM TH	0
AMDLA3020S-R47MT Abracon	IND 0.47UH 8A 18MOHM SMD	0
AIUR-10-181K Abracon	FIXED IND 180UH 550MA 650 MOHM	0
ASPI-6045S-5R6M-T Abracon	FIXED IND 5.6UH 3.15A 29 MOHM	1139
AIRD-03-5R6M Abracon	FIXED IND 5.6UH 21A 3 MOHM TH	0
AISC-1008-R056G-T Abracon	FIXED IND 56NH 1A 180 MOHM SMD	0
ASPI-0403H-4R7M-T Abracon	FIXED IND 4.7UH 1.7A 94 MOHM SMD	0
AISC-0402-12NG-T Abracon	FIXED IND 12NH 640MA 120 MOHM	12225
AMPLA7030S-R90MT Abracon	FIXED IND 900NH 11A 10 MOHM SMD	0
ASPI-U201610-1R0M-T Abracon	FIXED INDUCTOR 1UH 2.6A SMD	0
AMPLA1004S-R68MT Abracon	FIXED IND 680NH 22A 2.7 MOHM SMD	0
AIML-0805-R068K-T Abracon	FIXED IND 68NH 300MA 200 MOHM	6740

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