Fixed Inductors

Part Number	Description / PDF	Quantity
PA4310.124NLT PulseLarsen Antenna	FIXED IND 120UH 3.2A 380 MOHM	0
P0147NL PulseLarsen Antenna	FIXED IND 56UH 1.65A 139 MOHM	680
PA4306.333NLT PulseLarsen Antenna	FIXED IND 33UH 1.2A 470 MOHM SMD	0
PM4346.122NLT PulseLarsen Antenna	FIXED IND 1.2UH 28A 3 MOHM SMD	0
PA4342.901ANLT PulseLarsen Antenna	FIXED IND 900NH 19A 2.6 MOHM SMD	365
PA4344.182ANLT PulseLarsen Antenna	FIXED IND 1.8UH 35A 2 MOHM SMD	0
PM2207.272NLT PulseLarsen Antenna	FIXED IND 2.7UH 11.4A 15.4 MOHM	0
PM4548.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 7A 28 MOHM SMD	0
PM2206.331NLT PulseLarsen Antenna	FIXED IND 330NH 19A 4.8 MOHM SMD	0
PG0871.102NL PulseLarsen Antenna	FIXED IND 1UH 17.5A 2.3 MOHM SMD	4250
PD0120.373NL PulseLarsen Antenna	FIXED IND 40.7UH 4A 58.5 MOHM	0
PE-53112NL PulseLarsen Antenna	FIXED IND 47UH 3A 50 MOHM TH	1960
P0770.223NLT PulseLarsen Antenna	FIXED IND 22UH 700MA 370 MOHM	0
PA4305.334NLT PulseLarsen Antenna	FIXED IND 330UH 350MA 4.344 OHM	0
PA4307.332NLT PulseLarsen Antenna	FIXED IND 3.3UH 5.4A 60 MOHM SMD	0
PA4305.683NLT PulseLarsen Antenna	FIXED IND 68UH 800MA 950 MOHM	0
PA4343.223NLT PulseLarsen Antenna	FIXED IND 22UH 9A 37 MOHM SMD	0
PE-0603CD130JTT PulseLarsen Antenna	FIXED IND 13NH 700MA 110 MOHM	0
PE-53681NL PulseLarsen Antenna	FIXED IND 2.5UH 11.4A 5.4 MOHM	0
PA2050.163NL PulseLarsen Antenna	FIXED IND 16UH 9.9A 9.1 MOHM SMD	437

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