Fixed Inductors

Part Number	Description / PDF	Quantity
PM4546.151NLT PulseLarsen Antenna	FIXED IND 150NH 10A 6.8 MOHM SMD	0
PA4308.394NLT PulseLarsen Antenna	FIXED IND 390UH 650MA 4.25 OHM	0
PM5433.302NLT PulseLarsen Antenna	IND COMP AECQ 1580 3UH 34.5A	0
PA0511.221NLT PulseLarsen Antenna	FIXED IND 220NH 25A 0.39 MOHM	4270000
P0846NL PulseLarsen Antenna	FIXED IND 14.8UH 5A 23 MOHM TH	206
PE-53361NL PulseLarsen Antenna	FIXED IND 530NH 23.8A 3 MOHM SMD	38
PF0464.103NLT PulseLarsen Antenna	FIXED IND 10UH 1.7A 52 MOHM SMD	0
PF0464.302NLT PulseLarsen Antenna	FIXED IND 3UH 3A 22 MOHM SMD	0
PA4330.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 1.7A 170 MOHM	0
P1168.224NLT PulseLarsen Antenna	FIXED IND 220UH 800MA 681 MOHM	0
PM4343.333NLT PulseLarsen Antenna	FIXED IND 33UH 8A 58 MOHM SMD	0
PA4546.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 2.8A 80 MOHM SMD	0
PA5003.122NLT PulseLarsen Antenna	FIXED IND 1.2UH 11A 9.7MOHM SMD	1281
PA4309.474NLT PulseLarsen Antenna	FIXED IND 470UH 1.6A 1.755 OHM	0
PA5002.161NLT PulseLarsen Antenna	FIXED IND 160NH 18.8A 4.6 MOHM	0
PE-0603CD220JTT PulseLarsen Antenna	FIXED IND 22NH 700MA 190 MOHM	19867
PA4334.104NLT PulseLarsen Antenna	FIXED IND 100UH 210MA 3.718 OHM	0
PA4310.154NLT PulseLarsen Antenna	FIXED IND 150UH 3A 430 MOHM SMD	0
PA4548.223NLT PulseLarsen Antenna	FIXED IND 22UH 1.4A 215 MOHM SMD	0
PA5119.901NLT PulseLarsen Antenna	FIXED IND 900NH 14A 4.6 MOHM SMD	3064

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