Fixed Inductors

Part Number	Description / PDF	Quantity
36501JR22JTDG TE Connectivity AMP Connectors	FIXED IND 220NH 250MA 1.6 OHM	4067
36501E39NJTDG TE Connectivity AMP Connectors	FIXED IND 39NH 200MA 550 MOHM	2365
36401E3N3A TE Connectivity AMP Connectors	FIXED IND 3.3NH 380MA 450 MOHM	0
36502C47NJTDG TE Connectivity AMP Connectors	FIXED IND 47NH 1A 160 MOHM SMD	103
36501E8N2JTDG TE Connectivity AMP Connectors	FIXED IND 8.2NH 680MA 104 MOHM	263
36501JR27JTDG TE Connectivity AMP Connectors	FIXED IND 270NH 200MA 2.1 OHM	0
36401E33NJTD TE Connectivity AMP Connectors	FIXED IND 33NH 75MA 4.5 OHM SMD	0
36502C8R2JTDG TE Connectivity AMP Connectors	FIXED IND 8.2UH 170MA 6 OHM SMD	0
2176075-7 TE Connectivity AMP Connectors	FIXED IND 0.7NH 300MA 300 MOHM	0
36502AR10JTDG TE Connectivity AMP Connectors	FIXED IND 100NH 400MA 460 MOHM	2233
4-2176075-8 TE Connectivity AMP Connectors	FIXED IND 8.2NH 110MA 3 OHM SMD	510
36401E5N9ATDF TE Connectivity AMP Connectors	FIXED IND 5.9NH 280MA 850 MOHM	0
36502A47NKTE TE Connectivity AMP Connectors	FIXED IND 47NH 500MA 310 MOHM	0
3613C151K TE Connectivity AMP Connectors	FIXED IND 150UH 105MA 9 OHM SMD	0
36501J47NJTDG TE Connectivity AMP Connectors	FIXED IND 47NH 600MA 280 MOHM	1419
3613C101K TE Connectivity AMP Connectors	FIXED IND 100UH 110MA 8 OHM SMD	576
36401E6N8A TE Connectivity AMP Connectors	FIXED IND 6.8NH 260MA 1.05 OHM	0
36401E33NJTDF TE Connectivity AMP Connectors	FIXED IND 33NH 75MA 4.5 OHM SMD	1970
5-2176075-0 TE Connectivity AMP Connectors	FIXED IND 9.2NH SMD	1000
SC30R15KT TE Connectivity AMP Connectors	FIXED IND 150NH 1.33A 100 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