Fixed Inductors

Part Number	Description / PDF	Quantity
MLG0603P16NJT000 TDK Corporation	FIXED IND 16NH 200MA 1.2 OHM SMD	10188
VLS201610HBX-2R2M-1 TDK Corporation	FIXED IND 2.2UH 1.45A 170 MOHM	6251
HPL505032F1070MRD3P TDK Corporation	INDUCTORS FOR POWER CIRCUITS, AU	0
MLF1005G1R5JT TDK Corporation	FIXED IND 1.5UH 35MA 950 MOHM	0
MLF2012E120KT000 TDK Corporation	FIXED IND 12UH 15MA 900 MOHM SMD	622
VLS3015ET-470M TDK Corporation	FIXED IND 47UH 320MA 1.5 OHM SMD	3477
MLG1005S13NHT000 TDK Corporation	FIXED IND 13NH 400MA 500 MOHM	0
SPM6550T-1R5M-HZ TDK Corporation	FIXED IND 1.5UH 17.1A 6.49 MOHM	1324
NLFV32T-102K-EF TDK Corporation	FIXED IND 1MH 20MA 27 OHM SMD	5627
MLG0402P16NJT000 TDK Corporation	FIXED IND 16NH 140MA 2.7 OHM SMD	0
MLZ2012DR22DTD25 TDK Corporation	FIXED IND 220NH 900MA 130 MOHM	1370
MLD2016S2R2MTD25 TDK Corporation	FIXED IND 2.2UH 900MA 221 MOHM	3012
CLF10060NIT-680M-D TDK Corporation	FIXED IND 68UH 1.45A 109.2 MOHM	0
MLG1005S3N6BT000 TDK Corporation	FIXED IND 3.6NH 700MA 200 MOHM	13032
MHQ1005P1N6BT000 TDK Corporation	FIXED IND 1.6NH 1A 40 MOHM SMD	29434
NLCV32T-101K-EF TDK Corporation	FIXED IND 100UH 120MA 4.81 OHM	6030
VLS201612HBX-R68M-1 TDK Corporation	FIXED IND 680NH 2.77A 54 MOHM	678
NLFC453232T-150K-PF TDK Corporation	FIXED IND 15UH 200MA 300 MOHM	470
MLG0402Q1N9CT000 TDK Corporation	FIXED IND 1.9NH 200MA 600 MOHM	0
MLP2520S100ST0S1 TDK Corporation	FIXED IND 10UH 700MA 364 MOHM	13911

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