Fixed Inductors

Part Number	Description / PDF	Quantity
36501E2N2JTDG TE Connectivity AMP Connectors	FIXED IND 2.2NH 960MA 70 MOHM	5076
36502A10NJTDG TE Connectivity AMP Connectors	FIXED IND 10NH 600MA 100 MOHM	20541
36502A6N8JTDG TE Connectivity AMP Connectors	FIXED IND 6.8NH 600MA 110 MOHM	1106
36401E20N8GTDF TE Connectivity AMP Connectors	FIXED IND 20.8NH 90MA 2.55 OHM	2000
36501J15NJTDG TE Connectivity AMP Connectors	FIXED IND 15NH 700MA 170 MOHM	72
2176075-5 TE Connectivity AMP Connectors	FIXED IND 0.5NH 350MA 250 MOHM	0
SC301R2KT TE Connectivity AMP Connectors	FIXED IND 1.2UH 990MA 180 MOHM	0
SC30220KT TE Connectivity AMP Connectors	FIXED IND 22UH 232MA 3.3 OHM TH	618
SC302R7KT TE Connectivity AMP Connectors	FIXED IND 2.7UH 565MA 550 MOHM	22
36501E36NJ TE Connectivity AMP Connectors	FIXED IND 36NH 320MA 440 MOHM	2001
SC30R39KT TE Connectivity AMP Connectors	FIXED IND 390NH 770MA 300 MOHM	0
36501J22NJTDG TE Connectivity AMP Connectors	FIXED IND 22NH 700MA 190 MOHM	1585
36401E22NFTDF TE Connectivity AMP Connectors	FIXED IND 22NH 90MA 2.65 OHM SMD	0
3631B101LT TE Connectivity AMP Connectors	FIXED IND 100UH 1.1A 220 MOHM	0
36401E1N4ATDF TE Connectivity AMP Connectors	FIXED IND 1.4NH 700MA 250 MOHM	1985
36501J3N3JTDG TE Connectivity AMP Connectors	FIXED IND 3.3NH 700MA 80 MOHM	6170
36502A5N6JTDG TE Connectivity AMP Connectors	FIXED IND 5.6NH 600MA 80 MOHM	1674
SC304R7KT TE Connectivity AMP Connectors	FIXED IND 4.7UH 384MA 1.2 OHM TH	12
36501E11NJTDG TE Connectivity AMP Connectors	FIXED IND 11NH 640MA 120 MOHM	70
36401E2N6ATDF TE Connectivity AMP Connectors	FIXED IND 2.6NH 440MA 350 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