Fixed Inductors

Part Number	Description / PDF	Quantity
4-2176075-4 TE Connectivity AMP Connectors	FIXED IND 5.6NH 130MA 1.8 OHM	0
SC301R0KR TE Connectivity AMP Connectors	FIXED IND 1UH 420MA 1 OHM TH	0
SC30821KT TE Connectivity AMP Connectors	FIXED IND 820UH 52MA 65 OHM TH	0
SC30150KT TE Connectivity AMP Connectors	FIXED IND 15UH 251MA 2.8 OHM TH	0
36501J8N2JTDG TE Connectivity AMP Connectors	FIXED IND 8.2NH 700MA 110 MOHM	140
36401E3N9ATDF TE Connectivity AMP Connectors	FIXED IND 3.9NH 340MA 550 MOHM	775
3613C5R6K TE Connectivity AMP Connectors	FIXED IND 5.6UH 300MA 1.1 OHM	0
SC30R27KT TE Connectivity AMP Connectors	FIXED IND 270NH 1.05A 160 MOHM	0
36501JR10JTDG TE Connectivity AMP Connectors	FIXED IND 100NH 400MA 580 MOHM	7935
2176075-2 TE Connectivity AMP Connectors	FIXED IND 0.2NH 400MA 200 MOHM	0
3631C151LT TE Connectivity AMP Connectors	FIXED IND 150UH 1.4A 240 MOHM	0
SC30R68KT TE Connectivity AMP Connectors	FIXED IND 680NH 540MA 600 MOHM	0
36502CR68JTDG TE Connectivity AMP Connectors	FIXED IND 680NH 400MA 1.47 OHM	1527
36401E3N3ATDF TE Connectivity AMP Connectors	FIXED IND 3.3NH 380MA 450 MOHM	0
36401E6N8BTD TE Connectivity AMP Connectors	FIXED IND 6.8NH 260MA 1.05 OHM	0
1-2176075-5 TE Connectivity AMP Connectors	FIXED IND 1.5NH 250MA 450 MOHM	1935
1-2176075-6 TE Connectivity AMP Connectors	FIXED IND 1.6NH 200MA 550 MOHM	1000
3632B153LL TE Connectivity AMP Connectors	FIXED IND 15MH 75MA 40 OHM SMD	0
36401E6N8ATDF TE Connectivity AMP Connectors	FIXED IND 6.8NH 260MA 1.05 OHM	2000
36501E3N6JTDG TE Connectivity AMP Connectors	FIXED IND 3.6NH 840MA 66 MOHM	1524

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