Fixed Inductors

Part Number	Description / PDF	Quantity
36501E33NJTDG TE Connectivity AMP Connectors	FIXED IND 33NH 400MA 350 MOHM	1900
36501J51NJTDG TE Connectivity AMP Connectors	FIXED IND 51NH 600MA 280 MOHM	1778
36502CR15JTDG TE Connectivity AMP Connectors	FIXED IND 150NH 580MA 700 MOHM	2100
3632B102LT TE Connectivity AMP Connectors	FIXED IND 1MH 300MA 2.5 OHM SMD	0
36401E0N4ATDF TE Connectivity AMP Connectors	FIXED IND 0.4NH 800MA 100 MOHM	0
5-2176075-1 TE Connectivity AMP Connectors	FIXED IND 10NH 80MA 3.5 OHM SMD	0
SC30561KT TE Connectivity AMP Connectors	FIXED IND 560UH 62MA 46 OHM TH	0
3631B220MT TE Connectivity AMP Connectors	FIXED IND 22UH 2.3A 62 MOHM SMD	0
36501E6N2JTDG TE Connectivity AMP Connectors	FIXED IND 6.2NH 760MA 83 MOHM	1108
36502C1R0JTDG TE Connectivity AMP Connectors	FIXED IND 1UH 370MA 1.75 OHM SMD	0
SC30221KT TE Connectivity AMP Connectors	FIXED IND 220UH 92MA 21 OHM TH	0
36502A3N3JTDG TE Connectivity AMP Connectors	FIXED IND 3.3NH 600MA 80 MOHM	1881
3613C220K TE Connectivity AMP Connectors	FIXED IND 22UH 180MA 3.2 OHM SMD	617
36501J2N2JTDG TE Connectivity AMP Connectors	FIXED IND 2.2NH 700MA 100 MOHM	1273
3613C470K TE Connectivity AMP Connectors	FIXED IND 47UH 140MA 5 OHM SMD	444
36401E4N7ATDF TE Connectivity AMP Connectors	FIXED IND 4.7NH 320MA 650 MOHM	550
36501J6N8JTDG TE Connectivity AMP Connectors	FIXED IND 6.8NH 700MA 110 MOHM	6445
36401E3N2ATDF TE Connectivity AMP Connectors	FIXED IND 3.2NH 380MA 450 MOHM	0
3631B101LL TE Connectivity AMP Connectors	FIXED IND 100UH 1.1A 220 MOHM	919
36501J36NJTDG TE Connectivity AMP Connectors	FIXED IND 36NH 600MA 250 MOHM	3224

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