Fixed Inductors

Part Number	Description / PDF	Quantity
PG0926.182NL PulseLarsen Antenna	FIXED IND 1.8UH 22A 2.2 MOHM SMD	0
PM4340.332NLT PulseLarsen Antenna	FIXED IND 3.3UH 5A 38 MOHM SMD	0
PE-0603CD8N7JTT PulseLarsen Antenna	FIXED IND 8.7NH 700MA 110 MOHM	0
PA4310.103NLT PulseLarsen Antenna	FIXED IND 10UH 12A 37 MOHM SMD	0
PA4340.222ANLT PulseLarsen Antenna	FIXED IND 2.2UH 7A 25 MOHM SMD	0
PE-1008CD151GTT PulseLarsen Antenna	FIXED IND 150NH 580MA 160 MOHM	0
PM4345.681NLT PulseLarsen Antenna	FIXED IND 680NH 10A 12.4 MOHM	0
PG1083.323NL PulseLarsen Antenna	FIXED IND 32UH 9A 21.5 MOHM SMD	0
PA4306.154NLT PulseLarsen Antenna	FIXED IND 150UH 600MA 1.82 OHM	0
PA4305.564NLT PulseLarsen Antenna	FIXED IND 560UH 260MA 10.116 OHM	0
PE-53690NL PulseLarsen Antenna	FIXED IND 810NH 14.3A 2.5 MOHM	0
PG0936.113NLT PulseLarsen Antenna	FIXED IND 11UH 14A 7 MOHM SMD	0
PE-0402CL3N6STT PulseLarsen Antenna	FIXED IND 3.6NH 300MA 200 MOHM	20000
PE-53935SNL PulseLarsen Antenna	FIXED IND 250UH 1.5A 230 MOHM	726
PA4308.564NLT PulseLarsen Antenna	FIXED IND 560UH 530MA 7.83 OHM	0
PA4547.471NLT PulseLarsen Antenna	FIXED IND 470NH 5.5A 28 MOHM SMD	0
PM2205.182NLT PulseLarsen Antenna	FIXED IND 1.8UH 16A 7.1MOHM SMD	0
PG0087.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 2.2A 45 MOHM SMD	0
PE-0402CL4N7STT PulseLarsen Antenna	FIXED IND 4.7NH 300MA 200 MOHM	18035
PG1083.152NL PulseLarsen Antenna	FIXED IND 1.5UH 40A 1.4 MOHM SMD	987

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