Fixed Inductors

Part Number	Description / PDF	Quantity
MGDQ6-00034-P TE Connectivity AMP Connectors	FIXED INDUCTOR SMD	0
3635B5R6PT TE Connectivity AMP Connectors	FIXED IND 5.6UH 12A 11.4 MOHM	0
36502C27NJTDG TE Connectivity AMP Connectors	FIXED IND 27NH 1A 130 MOHM SMD	3960
36502A7N5JTDG TE Connectivity AMP Connectors	FIXED IND 7.5NH 600MA 140 MOHM	0
36502A2R2GTDG TE Connectivity AMP Connectors	FIXED IND 2.2UH 160MA 2.7 OHM	0
SC301R8KT TE Connectivity AMP Connectors	FIXED INDUCTOR	0
SC10101KT TE Connectivity AMP Connectors	FIXED IND 100UH 146MA 11 OHM TH	0
36501E4N7JTDG TE Connectivity AMP Connectors	FIXED IND 4.7NH 640MA 130 MOHM	3424
SC101R0KT TE Connectivity AMP Connectors	FIXED IND 1UH 880MA 300 MOHM TH	0
SC10330KT TE Connectivity AMP Connectors	FIXED IND 33UH 210MA 5.2 OHM TH	0
36501J5N6GTDG TE Connectivity AMP Connectors	FIXED IND 5.6NH 700MA 170 MOHM	0
SC10220KT TE Connectivity AMP Connectors	FIXED IND 22UH 280MA 3 OHM TH	0
36512A22NKTDG TE Connectivity AMP Connectors	FIXED IND 22NH 800MA 150 MOHM	0
36502C6R8JTDG TE Connectivity AMP Connectors	FIXED IND 6.8UH 200MA 4.9 OHM	0
36502A68NJTDG TE Connectivity AMP Connectors	FIXED IND 68NH 500MA 380 MOHM	5178
36502A91NJTDG TE Connectivity AMP Connectors	FIXED IND 91NH 400MA 480 MOHM	3988
36501J27NGTDG TE Connectivity AMP Connectors	FIXED IND 27NH 600MA 220 MOHM	0
36501E23NJTDG TE Connectivity AMP Connectors	FIXED IND 23NH 400MA 300 MOHM	4000
1-1676946-8 TE Connectivity AMP Connectors	FIXED IND 2.2UH 1.6A 135 MOHM	0
36502A10NGTDG TE Connectivity AMP Connectors	FIXED IND 10NH 600MA 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