Fixed Inductors

Part Number	Description / PDF	Quantity
36541E2N7JTDG TE Connectivity AMP Connectors	FIXED IND 2.7NH 1.5A 56 MOHM	0
MSC30101KT TE Connectivity AMP Connectors	FIXED IND 100UH 84MA 8 OHM TH	0
MGDQ4-00012-P TE Connectivity AMP Connectors	FIXED INDUCTOR	0
36541E9N5JTDG TE Connectivity AMP Connectors	FIXED IND 9.5NH 1.4A 80 MOHM	0
36501JR15GTDG TE Connectivity AMP Connectors	FIXED IND 150NH 280MA 950 MOHM	0
MGDS5-00005-P TE Connectivity AMP Connectors	FIXED IND 47UH 2.4A 97 MOHM SMD	999
36502AR82GTDG TE Connectivity AMP Connectors	FIXED IND 820NH 180MA 2.35 OHM	0
3-2176086-5 TE Connectivity AMP Connectors	FIXED IND 27NH 450MA 275 MOHM	0
36502C123JTDG TE Connectivity AMP Connectors	FIXED IND 12UH 130MA 10.5 OHM	3713
SC102R2KT TE Connectivity AMP Connectors	FIXED IND 2.2UH 460MA 1.1 OHM TH	0
3621C681KT TE Connectivity AMP Connectors	FIXED INDUCTOR 680UH	0
3630E4R7MT TE Connectivity AMP Connectors	FIXED IND 4.7UH 1.4A 60 MOHM	0
36502A24NJTDG TE Connectivity AMP Connectors	FIXED IND 24NH 500MA 220 MOHM	0
MGDQ6-00009-P TE Connectivity AMP Connectors	FIXED INDUCTOR 10UH 22 MOHM SMD	0
36502CR75JTDG TE Connectivity AMP Connectors	FIXED IND 750NH 360MA 1.54 OHM	0
3635BR60PT TE Connectivity AMP Connectors	FIXED IND 600NH 28A 2.5 MOHM SMD	0
SC552R2KR TE Connectivity AMP Connectors	FIXED IND 2.2UH 1.8A 60 MOHM TH	0
36541E2N2JTDG TE Connectivity AMP Connectors	FIXED IND 2.2NH 2.1A 38 MOHM	0
3621D222KT TE Connectivity AMP Connectors	FIXED IND 2.2MH 130MA 10 OHM SMD	0
SC0912102K TE Connectivity AMP Connectors	FIXED IND 1MH 200MA 4.3 OHM TH	0

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