Fixed Inductors

Part Number	Description / PDF	Quantity
PA4308.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 9A 42 MOHM SMD	0
P1167.823NL PulseLarsen Antenna	FIXED IND 82UH 700MA 350 MOHM	0
PA4310.223NLT PulseLarsen Antenna	FIXED IND 22UH 7A 82 MOHM SMD	0
PG0926.102NL PulseLarsen Antenna	FIXED IND 1UH 30A 1.2 MOHM SMD	0
PM4341.151NLT PulseLarsen Antenna	FIXED IND 150NH 27A 1.9 MOHM SMD	0
P0770.103NLT PulseLarsen Antenna	FIXED IND 10UH 1.1A 160 MOHM SMD	4094
PA2891.321HLT PulseLarsen Antenna	FIXED IND 320NH 72A 0.22 MOHM	18000
PA4349.332ANLT PulseLarsen Antenna	FIXED IND 3.3UH 49A 1.75 MOHM	738
PA4303.183NLT PulseLarsen Antenna	FIXED IND 18UH 2.9A 65 MOHM SMD	0
P1252.332NL PulseLarsen Antenna	FIXED IND 3.3UH 10A 8.6 MOHM SMD	0
PA4334.122NLT PulseLarsen Antenna	FIXED IND 1.2UH 2.01A 59 MOHM	0
PE-53819SNLT PulseLarsen Antenna	FIXED IND 173UH 540MA 600 MOHM	2113
PA4333.153NLT PulseLarsen Antenna	FIXED IND 15UH 2.5A 127 MOHM	0
PA4310.682NLT PulseLarsen Antenna	FIXED IND 6.8UH 14A 32 MOHM SMD	0
PM2205.432NLT PulseLarsen Antenna	FIXED IND 4.3UH 9A 16.2 MOHM SMD	0
PE-0402CD2N0JTT PulseLarsen Antenna	FIXED INDUCTOR 2NH SMD	0
PE-0603CD201JTT PulseLarsen Antenna	FIXED IND 200NH 240MA 1.98 OHM	0
P0770.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 2.3A 70 MOHM SMD	209
PE-0603CD331JTT PulseLarsen Antenna	FIXED IND 330NH 150MA 2.3 OHM	0
PA4337.471NLT PulseLarsen Antenna	FIXED IND 470NH 6.5A 8 MOHM SMD	2381

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