Fixed Inductors

Part Number	Description / PDF	Quantity
AISC-1008-R56J-T Abracon	FIXED IND 560NH 400MA 1.33 OHM	1180
AISC-0603F-5R6J-T Abracon	FIXED IND 5.6UH 150MA 3 OHM SMD	0
ASPI-U201610-R68M-T Abracon	FIXED INDUCTOR 680NH 3.1A SMD	0
AIAP-03-562K Abracon	FIXED IND 5.6MH 359MA 3.92 OHM	0
AMPLA1707Q-6R8MT Abracon	FIXED IND 6.8UH 19A 9.2 MOHM SMD	0
ATFC-0201HQ-3N7B-T Abracon	FIXED IND 3.7NH 350MA 400 MOHM	0
AIUR-07-121K Abracon	FIXED IND 120UH 350MA 870 MOHM	0
ASPIAIG-F1040-R27M-T Abracon	FIXED IND 270NH 33A 1 MOHM SMD	870
ASPI-0804T-220M-T Abracon	FIXED IND 22UH 2.6A 85 MOHM SMD	0
ASPIAIG-F7020-R27M-T Abracon	FIXED IND 270NH 21A 3.5 MOHM SMD	1796
AMPLA7030Q-R40MT Abracon	FIXED IND 400NH 18A 4.1 MOHM SMD	0
AISC-1210-82NJ-T Abracon	FIXED IND 82NH 900MA 200 MOHM	0
ASPI-0315FS-3R3M-T2 Abracon	FIXED IND 3.3UH 1.8A 75 MOHM SMD	3644
ASPI-6045S-270M-T Abracon	FIXED IND 27UH 1.65A 102 MOHM	8987
ASPI-4020S-330M-T Abracon	FIXED IND 33UH 490MA 550 MOHM	2513
AISC-1008-R068G-T Abracon	FIXED IND 68NH 1A 210 MOHM SMD	0
ASPI-0403-220K-T Abracon	FIXED IND 22UH 680MA 378 MOHM	0
ASMPH-0805-4R7M-T Abracon	FIXED IND 4.7UH 800MA 250 MOHM	1974
AIRD-01-1R2M Abracon	FIXED IND 1.2UH 9A 3 MOHM TH	0
AISC-0603-R11J-T Abracon	FIXED IND 110NH 250MA 730 MOHM	5450

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