Fixed Inductors

Part Number	Description / PDF	Quantity
PA5006.331NLT PulseLarsen Antenna	FIXED IND 330NH 19A 4.8 MOHM SMD	0
PM2207.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 13A 12.4 MOHM	0
P0770.472NL PulseLarsen Antenna	FIXED IND 4.7UH 1.5A 90 MOHM SMD	0
PM4346.561NLT PulseLarsen Antenna	FIXED IND 560NH 36A 1.5 MOHM SMD	0
PA4341.331ANLT PulseLarsen Antenna	FIXED IND 330NH 21A 3.4 MOHM SMD	0
PA4342.221NLT PulseLarsen Antenna	FIXED IND 220NH 35A 1 MOHM SMD	0
PA4303.223NLT PulseLarsen Antenna	FIXED IND 22UH 2.5A 75 MOHM SMD	0
PM2204.332NLT PulseLarsen Antenna	FIXED IND 3.3UH 8A 20.8MOHM SMD	0
PE-0603CD4N3JTT PulseLarsen Antenna	FIXED IND 4.3NH 700MA 102 MOHM	4085
P1167.224NLT PulseLarsen Antenna	FIXED IND 220UH 430MA 930 MOHM	1590
PA5041.121HLT PulseLarsen Antenna	FIXED IND 120NH 40A 0.29 MOHM	300
PA5001.401NLT PulseLarsen Antenna	FIXED IND 400NH 14A 7.73 MOHM	0
P1171.104NLT PulseLarsen Antenna	FIXED IND 100UH 1.4A 230 MOHM	0
P1174.684NLT PulseLarsen Antenna	FIXED IND 680UH 100MA 2.65 OHM	0
PE-52649NL PulseLarsen Antenna	FIXED IND 680UH 850MA 1.5 OHM TH	0
PG0087.332NL PulseLarsen Antenna	FIXED IND 3.3UH 2A 55 MOHM SMD	0
PM5433.202NLT PulseLarsen Antenna	IND COMP AECQ 1580 2UH 40A	0
PA5432.223NLT PulseLarsen Antenna	IND COMPOSITE 6060 22UH 5.0A	0
PM4344.683NLT PulseLarsen Antenna	FIXED IND 68UH 7A 80 MOHM SMD	0
P1167.824NLT PulseLarsen Antenna	FIXED IND 820UH 210MA 3.5 OHM	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