Fixed Inductors

Part Number	Description / PDF	Quantity
SC15101KT TE Connectivity AMP Connectors	FIXED IND 100UH 185MA 4.5 OHM TH	0
MSC60471KT TE Connectivity AMP Connectors	FIXED IND 470UH 92MA 9.5 OHM TH	0
36502C5R6JTDG TE Connectivity AMP Connectors	FIXED IND 5.6UH 240MA 4 OHM SMD	0
36502CR12JTDG TE Connectivity AMP Connectors	FIXED IND 120NH 650MA 630 MOHM	3450
36501J11NJTDG TE Connectivity AMP Connectors	FIXED IND 11NH 700MA 86 MOHM	0
36502C1R8JTDG TE Connectivity AMP Connectors	FIXED IND 1.8UH 300MA 2.6 OHM	4000
4-2176086-2 TE Connectivity AMP Connectors	FIXED IND 43NH 450MA 520 MOHM	0
MGDQ5-00002-P TE Connectivity AMP Connectors	FIXED INDUCTOR	0
3639E151NT TE Connectivity AMP Connectors	FIXED IND 150UH 1A 305 MOHM SMD	0
3631A471KT TE Connectivity AMP Connectors	FIXED IND 470UH 450MA 1.98 OHM	0
36501E24NJTDG TE Connectivity AMP Connectors	FIXED IND 24NH 400MA 300 MOHM	0
36541E8N2JTDG TE Connectivity AMP Connectors	FIXED IND 8.2NH 1.5A 58 MOHM	0
3621D101KT TE Connectivity AMP Connectors	FIXED IND 100UH 720MA 450 MOHM	0
36501J9N5JTDG TE Connectivity AMP Connectors	FIXED IND 9.5NH 700MA 130 MOHM	0
3615AR22K TE Connectivity AMP Connectors	FIXED IND 220NH 2.57A 35 MOHM	0
36502C1R2JTDG TE Connectivity AMP Connectors	FIXED IND 1.2UH 310MA 2 OHM SMD	0
MGDQ5-00019-P TE Connectivity AMP Connectors	FIXED INDUCTOR	0
SC0914102K TE Connectivity AMP Connectors	FIXED IND 1MH 300MA 2.1 OHM TH	0
36501E51NJTDG TE Connectivity AMP Connectors	FIXED IND 51NH 100MA 820 MOHM	0
36501JR26JTDG TE Connectivity AMP Connectors	FIXED IND 260NH 200MA 2 OHM SMD	3767

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