Fixed Inductors

Part Number	Description / PDF	Quantity
AMPLA5030Q-100MT Abracon	FIXED IND 10UH 2.75A 128 MOHM	0
ASPI-0705-181K-T Abracon	FIXED IND 180UH 510MA 710 MOHM	0
AMPLA1306S-R50MT Abracon	FIXED IND 500NH 40A 1.25 MOHM	0
ASPI-4020S-8R2M-T Abracon	FIXED IND 8.2UH 1.04A 125 MOHM	0
ASPI-6045S-510M-T Abracon	FIXED IND 51UH 1.15A 207 MOHM	1922
ASPIAIG-S4035-220M-T Abracon	FIXED IND 22UH 1.3A 290MOHM SMD	1413
ASPI-4030S-390M-T Abracon	FIXED IND 39UH 730MA 435 MOHM	0
AIMC-0805-22NJ-T Abracon	FIXED IND 22NH 300MA 500 MOHM	14892
AISC-0402HP-4N7J-T Abracon	FIXED IND 4.7NH 1.4A 75 MOHM SMD	8432
ASPI-0410FS-330M-T35 Abracon	FIXED IND 33UH 280MA 1.54 OHM	0
ASPI-0628-330M-T1 Abracon	FIXED IND 33UH 1.1A 220 MOHM SMD	732
AMDLA1306Q-R10NT Abracon	FIXED IND 100NH 60A 0.25 MOHM	0
AISC-0603-R10J-T Abracon	FIXED IND 100NH 260MA 660 MOHM	8750
AIUR-15-391K Abracon	FIXED IND 390UH 1.7A 290 MOHM TH	0
ASPI-2010-1R5M-T Abracon	FIXED IND 1.5UH 1.4A 174 MOHM	0
AMPLA1004S-R88MT Abracon	FIXED IND 880NH 20A 2.9 MOHM SMD	0
AISC-0805F-1R0J-T Abracon	FIXED IND 1UH 245MA 1.2 OHM SMD	39868
ASPI-0403H-1R0M-T Abracon	FIXED IND 1UH 3.8A 33 MOHM SMD	271
AIRD-03-2R2M Abracon	FIXED IND 2.2UH 21A 3 MOHM TH	11
AIRD-01-121K Abracon	FIXED IND 120UH 2A 127 MOHM TH	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