Fixed Inductors

Part Number	Description / PDF	Quantity
PE-0805CD221GTT PulseLarsen Antenna	FIXED IND 217NH 400MA 700 MOHM	34084
PA4303.102NLT PulseLarsen Antenna	FIXED IND 1UH 7.8A 8 MOHM SMD	0
PA4342.361ANLT PulseLarsen Antenna	FIXED IND 360NH 29A 1.18 MOHM	0
PA4304.684NLT PulseLarsen Antenna	FIXED IND 680UH 410MA 1.32 OHM	0
PA4322.223NLT PulseLarsen Antenna	FIXED IND 22UH 640MA 145 MOHM	0
P1167.223NL PulseLarsen Antenna	FIXED IND 22UH 1.4A 105 MOHM SMD	653
PA2607.211NLT PulseLarsen Antenna	FIXED IND 215NH 41A 0.29 MOHM	4375
PE-53810SNL PulseLarsen Antenna	FIXED IND 176UH 300MA 1.4 OHM	205
PA4548.821NLT PulseLarsen Antenna	FIXED IND 820NH 9A 9.5 MOHM SMD	0
PA5005.472NLT PulseLarsen Antenna	FIXED IND 4.7UH 8.5A 18.4 MOHM	2284
PM4342.472NLT PulseLarsen Antenna	FIXED IND 4.7UH 10A 15.5MOHM SMD	0
PE-92108KNL PulseLarsen Antenna	FIXED IND 67UH 3.6A 45 MOHM TH	2334
PM2201.561NLT PulseLarsen Antenna	FIXED IND 560NH 12A 9.3MOHM SMD	0
PA4302.473NLT PulseLarsen Antenna	FIXED IND 47UH 1.45A 185 MOHM	0
PG1083.253NLT PulseLarsen Antenna	FIXED IND 24.5UH 11A 15 MOHM SMD	0
PF0581.473NL PulseLarsen Antenna	FIXED IND 47UH 1.1A 166 MOHM SMD	0
PA4346.153ANLT PulseLarsen Antenna	FIXED IND 15UH 8.2A 36 MOHM SMD	0
PA2729.383NL PulseLarsen Antenna	FIXED IND 38.3UH 6.5A 19.7 MOHM	0
PG0871.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 9.5A 7.6 MOHM	2397
PM4341.102NLT PulseLarsen Antenna	FIXED IND 1UH 11A 10MOHM SMD	812

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