Fixed Inductors

Part Number	Description / PDF	Quantity
P0752.334NL PulseLarsen Antenna	FIXED IND 330UH 600MA 1.02 OHM	0
PA4390.121HLT PulseLarsen Antenna	FIXED IND 120NH 68A 0.185 MOHM	3787
PA2247.223NLT PulseLarsen Antenna	FIXED IND 22UH 16A 15.8MOHM SMD	569
PE-53651NLT PulseLarsen Antenna	FIXED IND 5.1UH 5.4A 17.7 MOHM	34
PF0601.104NL PulseLarsen Antenna	FIXED IND 100UH 340MA 1.12 OHM	0
PA4342.222ANLT PulseLarsen Antenna	FIXED IND 2.2UH 13A 6.7 MOHM SMD	3384
P1170.333NLT PulseLarsen Antenna	FIXED IND 33UH 2.6A 70 MOHM SMD	440
PE-0805CD560GTT PulseLarsen Antenna	FIXED IND 55.5NH 500MA 340 MOHM	0
PE-53933SNL PulseLarsen Antenna	FIXED IND 24UH 2.74A 70 MOHM SMD	1071
PA5119.152NLT PulseLarsen Antenna	FIXED IND 1.5UH 12A 6.0 MOHM	1300
PA4301.563NLT PulseLarsen Antenna	FIXED IND 56UH 685MA 273 MOHM	0
PG0926.223NL PulseLarsen Antenna	FIXED IND 22UH 7A 21 MOHM SMD	0
PG0871.821NLT PulseLarsen Antenna	FIXED IND 820NH 19A 2.3 MOHM SMD	0
PA4349.753ANLT PulseLarsen Antenna	FIXED IND 75UH 13A 31.6 MOHM SMD	0
PA4342.471ANLT PulseLarsen Antenna	FIXED IND 470NH 28A 1.5 MOHM SMD	0
P1168.334NLT PulseLarsen Antenna	FIXED IND 330UH 660MA 955 MOHM	0
PA4548.472NLT PulseLarsen Antenna	FIXED IND 4.7UH 4.6A 50 MOHM SMD	1144
PA4342.332NLT PulseLarsen Antenna	FIXED IND 3.3UH 11A 11.8 MOHM	85
PE-0402CD1N8JTT PulseLarsen Antenna	FIXED INDUCTOR 1.8NH SMD	0
PA4340.471ANLT PulseLarsen Antenna	FIXED IND 470NH 13.5A 6 MOHM SMD	3593

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