Fixed Inductors

Part Number	Description / PDF	Quantity
AMPLA1306S-5R6MT Abracon	FIXED IND 5.6UH 12.5A 10 MOHM	0
ASMCI-0805-4R7M-T Abracon	FIXED IND 4.7UH 180MA 300 MOHM	11985
ASPI-2512-1R0N-T2 Abracon	FIXED IND 1UH 1.7A 73 MOHM SMD	0
AIAP-03-330K Abracon	FIXED IND 33UH 4.83A 32 MOHM TH	0
AMDLA7030Q-4R7MT Abracon	FIXED IND 4.7UH 5A 33 MOHM SMD	1000
AIML-1206-5R6K-T Abracon	FIXED IND 5.6UH 25MA 750 MOHM	0
AISC-0402-4N3G-T Abracon	FIXED IND 4.3NH 700MA 91 MOHM	1694
ASPI-0310FS-3R3M-T2 Abracon	FIXED IND 3.3UH 1.8A 130 MOHM	0
AIMC-0402HQ-3N6C-T Abracon	FIXED IND 3.6NH 700MA 100 MOHM	0
AMPLA7050S-R82MT Abracon	FIXED IND 820NH 16.5A 4.9 MOHM	0
AIUR-04-123J Abracon	FIXED IND 12MH 40MA 40 OHM TH	8541
AIUR-09-470M Abracon	FIXED IND 47UH 1.7A 180 MOHM TH	0
AIAC-4125C-R130J-T Abracon	FIXED IND 130NH 3A 10.8 MOHM SMD	463
ASPIAIG-F1040-330M-T Abracon	FIXED IND 33UH 3.5A 112 MOHM SMD	904
AIMC-0603-6N8J-T Abracon	FIXED IND 6.8NH 500MA 220 MOHM	232
AISC-0603-R0075J-T Abracon	FIXED IND 7.5NH 700MA 95 MOHM	2573
AISC-1008-R75J-T Abracon	FIXED IND 750NH 360MA 1.54 OHM	1653
AMELA2010S-1R0MT Abracon	IND 1UH 3.4A 53MOHM SMD	2900
AIMC-0805-2N7S-T Abracon	FIXED IND 2.7NH 600MA 100 MOHM	10705
AISC-1008F-3R3J-T Abracon	FIXED IND 3.3UH 450MA 1.7 OHM	1434

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