Fixed Inductors

Part Number	Description / PDF	Quantity
SC10R68KT TE Connectivity AMP Connectors	FIXED IND 680NH 1.21A 160 MOHM	0
36502A1R5JTDG TE Connectivity AMP Connectors	FIXED IND 1.5UH 170MA 2.5 OHM	1995
3630F680MT TE Connectivity AMP Connectors	FIXED IND 68UH 1.6A 200 MOHM SMD	0
36501JR18GTDG TE Connectivity AMP Connectors	FIXED IND 180NH 250MA 1.4 OHM	0
2-2176086-1 TE Connectivity AMP Connectors	FIXED IND 11NH 1.4A 65 MOHM SMD	0
36541E6N2JTDG TE Connectivity AMP Connectors	FIXED IND 6.2NH 1.6A 50 MOHM	0
MGDQ4-00004-P TE Connectivity AMP Connectors	FIXED INDUCTOR 10UH 49 MOHM SMD	610
2-2176086-3 TE Connectivity AMP Connectors	FIXED IND 13NH 870MA 140 MOHM	0
3615A100K TE Connectivity AMP Connectors	FIXED IND 10UH 620MA 600 MOHM	2403
SC10471KT TE Connectivity AMP Connectors	FIXED IND 470UH 94MA 26.5 OHM TH	0
3615AR10K TE Connectivity AMP Connectors	FIXED IND 100NH 3.5A 27 MOHM SMD	0
36541E4N7JTDG TE Connectivity AMP Connectors	FIXED IND 4.7NH 1.5A 60 MOHM	0
36501J72NJTDG TE Connectivity AMP Connectors	FIXED IND 72NH 400MA 490 MOHM	3958
36502AR62JTDG TE Connectivity AMP Connectors	FIXED IND 620NH 210MA 2.2 OHM	0
36501J3N3GTDG TE Connectivity AMP Connectors	FIXED IND 3.3NH 700MA 80 MOHM	0
36501J1N8JTDG TE Connectivity AMP Connectors	FIXED IND 1.8NH 700MA 45 MOHM	0
2-2176086-6 TE Connectivity AMP Connectors	FIXED IND 18NH 900MA 120 MOHM	0
36502A43NJTDG TE Connectivity AMP Connectors	FIXED IND 43NH 500MA 340 MOHM	0
36502CR18JTDG TE Connectivity AMP Connectors	FIXED IND 180NH 620MA 770 MOHM	3800
36541E8N7JTDG TE Connectivity AMP Connectors	FIXED IND 8.7NH 1.5A 58 MOHM	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