Fixed Inductors

Part Number	Description / PDF	Quantity
PG0702.301NLT PulseLarsen Antenna	FIXED IND 300NH 42.5A 0.68 MOHM	0
PE-1008CD221GTT PulseLarsen Antenna	FIXED IND 220NH 500MA 840 MOHM	0
PA5432.103NLT PulseLarsen Antenna	IND COMPOSITE 6060 10UH 7.0A	0
P1166.223NLT PulseLarsen Antenna	FIXED IND 22UH 1.2A 126 MOHM SMD	0
PA4303.822NLT PulseLarsen Antenna	FIXED IND 8.2UH 4A 31 MOHM SMD	0
PA4310.224NLT PulseLarsen Antenna	FIXED IND 220UH 2.5A 660 MOHM	0
PA4304.102NLT PulseLarsen Antenna	FIXED IND 1UH 8.5A 11 MOHM SMD	0
PA4334.821NLT PulseLarsen Antenna	FIXED IND 820NH 2.47A 39 MOHM	0
PA4330.471NLT PulseLarsen Antenna	FIXED IND 470NH 3.1A 49 MOHM SMD	0
PA4320.334NLT PulseLarsen Antenna	FIXED IND 330UH 1.7A 340 MOHM	513
P1168.683NLT PulseLarsen Antenna	FIXED IND 68UH 1.5A 202 MOHM SMD	0
PA4301.562NLT PulseLarsen Antenna	FIXED IND 5.6UH 2.13A 45.5 MOHM	0
PG0871.472NL PulseLarsen Antenna	FIXED IND 4.7UH 6.7A 17 MOHM SMD	0
PE-53824SNL PulseLarsen Antenna	FIXED IND 26UH 1.48A 100 MOHM	0
PE-53828SNL PulseLarsen Antenna	FIXED IND 168UH 1.02A 400 MOHM	697
PA4344.472NLT PulseLarsen Antenna	FIXED IND 4.7UH 25A 5.5 MOHM SMD	0
PA4334.183NLT PulseLarsen Antenna	FIXED IND 18UH 580MA 709 MOHM	0
PE-0402CL8N2JTT PulseLarsen Antenna	FIXED IND 8.2NH 300MA 400 MOHM	19980
PA4300.183NLT PulseLarsen Antenna	FIXED IND 18UH 1A 119.6 MOHM SMD	0
PG0702.601NL PulseLarsen Antenna	FIXED IND 600NH 32A 0.91 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