Fixed Inductors

Part Number	Description / PDF	Quantity
3613C330K TE Connectivity AMP Connectors	FIXED IND 33UH 160MA 4 OHM SMD	810
2-2176075-5 TE Connectivity AMP Connectors	FIXED IND 2.5NH 150MA 800 MOHM	0
36401E7N2ATDF TE Connectivity AMP Connectors	FIXED IND 7.2NH 260MA 1.05 OHM	13000
3-2176075-4 TE Connectivity AMP Connectors	FIXED IND 3.4NH 150MA 1.2 OHM	0
36501J18NJTDG TE Connectivity AMP Connectors	FIXED IND 18NH 700MA 170 MOHM	0
1-2176075-1 TE Connectivity AMP Connectors	FIXED IND 1.1NH 300MA 350 MOHM	0
36502C15NJTDG TE Connectivity AMP Connectors	FIXED IND 15NH 1A 110 MOHM SMD	225
3632B222LL TE Connectivity AMP Connectors	FIXED IND 2.2MH 200MA 5 OHM SMD	0
36502A15NJTDG TE Connectivity AMP Connectors	FIXED IND 15NH 600MA 170 MOHM	1086
1-2176075-4 TE Connectivity AMP Connectors	FIXED IND 1.4NH 250MA 450 MOHM	1000
2176075-6 TE Connectivity AMP Connectors	FIXED IND 0.6NH 350MA 250 MOHM	0
3632B102LL TE Connectivity AMP Connectors	FIXED IND 1MH 300MA 2.5 OHM SMD	0
SC302R2KT TE Connectivity AMP Connectors	FIXED IND 2.2UH 665MA 400 MOHM	0
36502AR82JTDG TE Connectivity AMP Connectors	FIXED IND 820NH 180MA 2.35 OHM	1551
3613C1R0K TE Connectivity AMP Connectors	FIXED IND 1UH 450MA 500 MOHM SMD	0
4-2176075-1 TE Connectivity AMP Connectors	FIXED IND 4.4NH SMD	1000
2-2176075-1 TE Connectivity AMP Connectors	FIXED IND 2.1NH 200MA 700 MOHM	0
SC30680KT TE Connectivity AMP Connectors	FIXED IND 68UH 162MA 6.7 OHM TH	0
2-2176075-8 TE Connectivity AMP Connectors	FIXED IND 2.8NH 150MA 1 OHM SMD	0
36502C82NJTDG TE Connectivity AMP Connectors	FIXED IND 82NH 1A 220 MOHM SMD	1383

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