Fixed Inductors

Part Number	Description / PDF	Quantity
0402HM-160EJTS Delta Electronics	FIXED IND 16NH 370MA 240 MOHM	8000
0402HM-3N0EBTS Delta Electronics	FIXED IND 3NH 750MA 70 MOHM SMD	7265
0402HS-680EGTS Delta Electronics	FIXED IND 68NH 100MA 1.12 OHM	7335
0402HM-6N2EBTS Delta Electronics	FIXED IND 6.2NH 700MA 90 MOHM	7847
0805CS-8N2EKTS Delta Electronics	FIXED IND 8.2NH 600MA 120 MOHM	3992
0805CT-150EJTS Delta Electronics	FIXED IND 15NH 800MA 100MOHM SMD	1870
VCMT063T-3R3MN5T Delta Electronics	FIXED IND 3.3UH 7.5A 26MOHM SMD	0
0402HM-750EKTS Delta Electronics	FIXED IND 75NH 135MA 2.1 OHM SMD	8000
0402HP-360EKTS Delta Electronics	FIXED IND 36NH 480MA 360MOHM SMD	12000
0402HP-300EHTS Delta Electronics	FIXED IND 30NH 450MA 330MOHM SMD	7840
0402HP-1N0EJTS Delta Electronics	FIXED IND 1NH 2.3A 30 MOHM SMD	8420
0805CT-101EKTS Delta Electronics	FIXED IND 100NH 400MA 640 MOHM	3669
SDED20161T-100MS Delta Electronics	FIXED IND 10UH 470MA 1.119OHM SM	6000
0805CS-151EKFS Delta Electronics	FIXED IND 150NH 1.1A 180MOHM SMD	3930
0805CS-182EKFS Delta Electronics	FIXED IND 1.8UH 350MA 900 MOHM	3745
0402HC-6N0ECTS Delta Electronics	FIXED IND 6NH 760MA 56 MOHM SMD	7810
0805CS-820EJTS Delta Electronics	FIXED IND 82NH 400MA 420 MOHM	3881
0402HS-300EKTS Delta Electronics	FIXED IND 30NH 400MA 350MOHM SMD	8000
0805CT-8N2EKTS Delta Electronics	FIXED IND 8.2NH 800MA 80MOHM SMD	3990
0805CS-222EJFS Delta Electronics	FIXED IND 2.2UH 320MA 1.1OHM SMD	3743

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