Fixed Inductors

Part Number	Description / PDF	Quantity
PA4344.472ANLT PulseLarsen Antenna	FIXED IND 4.7UH 28A 4.5 MOHM SMD	497
PA4302.103NLT PulseLarsen Antenna	FIXED IND 10UH 3A 55 MOHM SMD	0
PE-1008CD391GTT PulseLarsen Antenna	FIXED IND 390NH 470MA 1.12 OHM	0
P1168.242NLT PulseLarsen Antenna	FIXED IND 2.4UH 7.5A 8.1 MOHM	0
PA5433.153NLT PulseLarsen Antenna	IND COMPOSITE 1580 15UH 13A	0
PG1083.152NLT PulseLarsen Antenna	FIXED IND 1.5UH 40A 1.4 MOHM SMD	0
PM4342.402NLT PulseLarsen Antenna	FIXED IND 4UH 10.2A 15 MOHM SMD	0
PE-92111KNL PulseLarsen Antenna	FIXED IND 40UH 4A 27 MOHM TH	721
PM2201.152NLT PulseLarsen Antenna	FIXED IND 1.5UH 7.6A 23.5 MOHM	0
PG0255.601NL PulseLarsen Antenna	FIXED IND 600NH 27A 1.87 MOHM	0
PM4346.472NLT PulseLarsen Antenna	FIXED IND 4.7UH 12A 15 MOHM SMD	0
PM2203.331NLT PulseLarsen Antenna	FIXED IND 330NH 19.2A 3.52 MOHM	4000
PA5001.361NLT PulseLarsen Antenna	FIXED IND 360NH 14.5A 6.3 MOHM	2860
PE-51510NL PulseLarsen Antenna	FIXED IND 23UH 11A 12 MOHM TH	0
PA4337.104NLT PulseLarsen Antenna	FIXED IND 100UH 800MA 563 MOHM	1425
PE-53828NL PulseLarsen Antenna	FIXED IND 168UH 1.02A 400 MOHM	12
PA4342.473ANLT PulseLarsen Antenna	FIXED IND 47UH 3A 143 MOHM SMD	9376
PG0926.282NL PulseLarsen Antenna	FIXED IND 2.8UH 19A 2.9 MOHM SMD	0
PE-0402CD820JTT PulseLarsen Antenna	FIXED IND 82NH 100MA 1.25 OHM	0
PA4305.103NLT PulseLarsen Antenna	FIXED IND 10UH 2.1A 153 MOHM SMD	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