Fixed Inductors

Part Number	Description / PDF	Quantity
ASPIAIG-F5030-R16M-T Abracon	FIXED IND 160NH 22.2A 2.33 MOHM	1971
AMPLA7012S-100MT Abracon	FIXED IND 10UH 1.8A 290 MOHM SMD	0
AIUR-11-221K Abracon	FIXED IND 220UH 800MA 353 MOHM	0
AIAP-03-561K Abracon	FIXED IND 560UH 1.17A 420 MOHM	9923
AISC-0603HP-8N7J-T Abracon	FIXED IND 8.7NH 1A 100 MOHM SMD	3399
AISC-1008-8R2J-T Abracon	FIXED IND 8.2UH 150MA 10.7 OHM	25
ATCA-02-471M-V Abracon	FIXED IND 470UH 1A 286 MOHM TH	0
ASPIAIG-S8050-1R5M-T Abracon	FIXED IND 1.5UH 6.5A 12 MOHM SMD	900
ATCA-03-320M-H Abracon	FIXED IND 32UH 4A 21 MOHM TH	0
ATCA-07-301M-V Abracon	FIXED IND 300UH 2A 142 MOHM TH	0
AMPLA1707S-4R7MT Abracon	FIXED IND 4.7UH 25A 5.5 MOHM SMD	0
AIAP-02-122K Abracon	FIXED IND 1.2MH 350MA 2.65 OHM	0
AIMC-0201-6N8S-T Abracon	FIXED IND 6.8NH 200MA 650 MOHM	12929
AMPLA7012S-6R8MT Abracon	FIXED IND 6.8UH 2.1A 198 MOHM	0
AIML-0805-R12K-T Abracon	FIXED IND 120NH 250MA 300 MOHM	0
AIRD-03-3R3M Abracon	FIXED IND 3.3UH 21A 3 MOHM TH	60
AISC-1008F-2R7J-T Abracon	FIXED IND 2.7UH 490MA 1.3 OHM	1934
ASPI-0428S-2R2M-T Abracon	FIXED IND 2.2UH 2.04A 31.3 MOHM	0
AIML-0805-R56K-T Abracon	FIXED IND 560NH 150MA 750 MOHM	7975
ASPI-2515-4R7M-T2 Abracon	FIXED IND 4.7UH 1.1A 206 MOHM	2000

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