Fixed Inductors

Part Number	Description / PDF	Quantity
AMPLA5030Q-150MT Abracon	FIXED IND 15UH 2.1A 190 MOHM SMD	0
AIMC-0603-56NJ-T Abracon	FIXED IND 56NH 300MA 750 MOHM	4126
ASPI-1306S-100M-T Abracon	FIXED IND 10UH 3.9A 40 MOHM SMD	0
AIUR-10-102K Abracon	FIXED IND 1MH 200MA 3.01 OHM TH	0
AISC-0603-R33G-T Abracon	FIXED IND 330NH 100MA 4.2 OHM	2160
ASPIAIG-F1040-2R5M-T Abracon	FIXED IND 2.5UH 11.5A 8.7 MOHM	1000
AIUR-03-101K Abracon	FIXED IND 100UH 720MA 280 MOHM	0
ASPI-0628-6R8M-T1 Abracon	FIXED IND 6.8UH 2.2A 52 MOHM SMD	1144
AMDLA3020S-2R2MT Abracon	IND 2.2UH 3.3A 69MOHM SMD	2985
AIMC-0402-2N2S-T Abracon	FIXED IND 2.2NH 300MA 200 MOHM	12451
ASPI-4020S-5R1M-T Abracon	FIXED IND 5.1UH 1.27A 85 MOHM	0
AISC-1008-R27J-T Abracon	FIXED IND 270NH 500MA 910 MOHM	1846
AMPLA4012S-3R3MT Abracon	FIXED IND 3.3UH 2.3A 97 MOHM SMD	0
ASPI-4020S-270M-T Abracon	FIXED IND 27UH 500MA 545 MOHM	0
AIRD-02-2R2M Abracon	FIXED IND 2.2UH 11.4A 4 MOHM TH	0
AMDLA7030Q-8R2MT Abracon	FIXED IND 8.2UH 4A 60 MOHM SMD	0
AIAP-03-332K Abracon	FIXED IND 3.3MH 470MA 2.63 OHM	0
ATFC-0201HQ-0N1B-T Abracon	FIXED IND 0.1NH 850MA 50 MOHM	0
AISC-0603-R22G-T Abracon	FIXED IND 220NH 140MA 2.1 OHM	3172
ASPI-4030S-4R3M-T Abracon	FIXED IND 4.3UH 2.1A 55 MOHM SMD	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