Fixed Inductors

Part Number	Description / PDF	Quantity
0402HM-100EHTS Delta Electronics	FIXED IND 10NH 500MA 170 MOHM	7990
0402HP-1N0EDTS Delta Electronics	FIXED IND 1NH 2.3A 30 MOHM SMD	7965
0805CT-102EJFS Delta Electronics	FIXED IND 1UH 450MA 900MOHM SMD	2568
0402HM-6N8EHTS Delta Electronics	FIXED IND 6.8NH 700MA 90MOHM SMD	7720
0402HP-160EGTS Delta Electronics	FIXED IND 16NH 850MA 130 MOHM	7888
0402HM-3N0EKTS Delta Electronics	FIXED IND 3NH 750MA 70 MOHM SMD	7989
0402HM-2N9EBTS Delta Electronics	FIXED IND 2.9NH 750MA 70 MOHM	7977
HMLB25200H-1R0MSR Delta Electronics	FIXED INDUCTOR 1UH	4990
0805CS-470EJTS Delta Electronics	FIXED IND 47NH 500MA 310 MOHM	2890
SDEM25201T-220MS Delta Electronics	FIXED IND 22UH 500MA 1.2OHM SMD	3710
0805CT-472EKFS Delta Electronics	FIXED IND 4.7UH 400MA 1.9OHM SMD	3793
0402HS-5N6EKTS Delta Electronics	FIXED IND 5.6NH 760MA 83MOHM SMD	7982
0402HS-400EGTS Delta Electronics	FIXED IND 40NH 320MA 500MOHM SMD	7720
0805CS-151EGTS Delta Electronics	FIXED IND 150NH 400MA 560 MOHM	3563
0402HP-4N7EDTS Delta Electronics	FIXED IND 4.7NH 1.5A 60 MOHM SMD	7984
0805CS-122EJTS Delta Electronics	FIXED IND 1.2UH 170MA 2.5 OHM	3980
HMLB25201T-2R2MSR Delta Electronics	FIXED IND 2.2UH 1.9A 112MOHM SMD	3890
0402HM-110EJTS Delta Electronics	FIXED IND 11NH 500MA 140 MOHM	8000
0402HM-8N2EJTS Delta Electronics	FIXED IND 8.2NH 540MA 140 MOHM	7973
0805CS-5N6EJTS Delta Electronics	FIXED IND 5.6NH 600MA 80 MOHM	3547

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