Fixed Inductors

Part Number	Description / PDF	Quantity
36401E3N6ATDF TE Connectivity AMP Connectors	FIXED IND 3.6NH 380MA 550 MOHM	2000
36502AR15JTDG TE Connectivity AMP Connectors	FIXED IND 150NH 400MA 560 MOHM	1992
36401E10NGTDF TE Connectivity AMP Connectors	FIXED IND 10NH 200MA 1.35 OHM	1515
36401E27NGTDF TE Connectivity AMP Connectors	FIXED IND 27NH 75MA 3.25 OHM SMD	960
SC30390KT TE Connectivity AMP Connectors	FIXED IND 39UH 222MA 3.6 OHM TH	0
SC30R82KT TE Connectivity AMP Connectors	FIXED IND 820NH 455MA 850 MOHM	0
36502A1R8JTDG TE Connectivity AMP Connectors	FIXED IND 1.8UH 170MA 2.5 OHM	3193
36501J30NJTDG TE Connectivity AMP Connectors	FIXED IND 30NH 600MA 150 MOHM	3185
36541E9N0JTDG TE Connectivity AMP Connectors	FIXED IND 9NH 1.4A 80 MOHM SMD	7398
36502A1R2JTDG TE Connectivity AMP Connectors	FIXED IND 1.2UH 170MA 2.5 OHM	1990
36501J12NJTDG TE Connectivity AMP Connectors	FIXED IND 12NH 700MA 130 MOHM	11270
SC30151KT TE Connectivity AMP Connectors	FIXED IND 150UH 108MA 15 OHM TH	0
2-2176075-6 TE Connectivity AMP Connectors	FIXED IND 2.6NH 150MA 800 MOHM	0
36502C12NJTDG TE Connectivity AMP Connectors	FIXED IND 12NH 1A 90 MOHM SMD	500
SC308R2KT TE Connectivity AMP Connectors	FIXED IND 8.2UH 256MA 2.7 OHM TH	0
36502C22NJTDG TE Connectivity AMP Connectors	FIXED IND 22NH 1A 120 MOHM SMD	3980
36501J16NJTDG TE Connectivity AMP Connectors	FIXED IND 16NH 700MA 110 MOHM	1500
36401E1N0ATDF TE Connectivity AMP Connectors	FIXED IND 1NH 700MA 150 MOHM	2940
36502CR39JTDG TE Connectivity AMP Connectors	FIXED IND 390NH 470MA 1.12 OHM	678
3613C221K TE Connectivity AMP Connectors	FIXED IND 220UH 100MA 10 OHM SMD	546

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