Fixed Inductors

Part Number	Description / PDF	Quantity
PG0871.222NL PulseLarsen Antenna	FIXED IND 2.2UH 9.5A 7.6 MOHM	2361
PG0426.101NLT PulseLarsen Antenna	FIXED IND 100NH 34.5A 1.5 MOHM	2778
P0752.105NL PulseLarsen Antenna	FIXED IND 1MH 300MA 3.3 OHM SMD	0
PA4336.103NLT PulseLarsen Antenna	FIXED IND 10UH 900MA 215 MOHM	4931
P1169.333NLT PulseLarsen Antenna	FIXED IND 33UH 2.2A 94 MOHM SMD	0
P0849NL PulseLarsen Antenna	FIXED IND 33UH 5A 47 MOHM TH	357
PA4320.153NLT PulseLarsen Antenna	FIXED IND 15UH 7A 22 MOHM SMD	0
PE-0805CD820GTT PulseLarsen Antenna	FIXED IND 82.7NH 400MA 420 MOHM	0
PA4303.184NLT PulseLarsen Antenna	FIXED IND 180UH 850MA 507 MOHM	0
PE-0603CD160JTT PulseLarsen Antenna	FIXED IND 16NH 700MA 170 MOHM	0
PM4341.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 8A 20 MOHM SMD	0
PM4342.152NLT PulseLarsen Antenna	FIXED IND 1.5UH 16A 4.6 MOHM SMD	0
PF0560.153NL PulseLarsen Antenna	FIXED IND 15UH 3.1A 50 MOHM SMD	0
PA4304.474NLT PulseLarsen Antenna	FIXED IND 470UH 580MA 770 MOHM	0
PM4342.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 12A 7 MOHM SMD	0
PA4304.104NLT PulseLarsen Antenna	FIXED IND 100UH 1.3A 160 MOHM	0
PA4310.563NLT PulseLarsen Antenna	FIXED IND 56UH 4.8A 191 MOHM SMD	0
PA4308.472NLT PulseLarsen Antenna	FIXED IND 4.7UH 6A 65 MOHM SMD	0
P1168.474NLT PulseLarsen Antenna	FIXED IND 470UH 570MA 1.403 OHM	0
PA4349.473ANLT PulseLarsen Antenna	FIXED IND 47UH 17A 20.8 MOHM SMD	539

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