Fixed Inductors

Part Number	Description / PDF	Quantity
PE-0402CL1N2STT PulseLarsen Antenna	FIXED IND 1.2NH 400MA 100 MOHM	19890
PA4310.334NLT PulseLarsen Antenna	FIXED IND 330UH 1.8A 941 MOHM	0
PE-0603CD181GTT PulseLarsen Antenna	FIXED IND 180NH 240MA 1.25 OHM	0
P1169.473NL PulseLarsen Antenna	FIXED IND 47UH 1.8A 140 MOHM SMD	0
PE-1008CD820GTT PulseLarsen Antenna	FIXED IND 82NH 1A 140 MOHM SMD	10022
P1170.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 9.6A 5.7 MOHM	0
PM4342.682NLT PulseLarsen Antenna	FIXED IND 6.8UH 8.5A 23.3 MOHM	0
PA5119.421NLT PulseLarsen Antenna	FIXED IND 420NH 16A 3.15 MOHM	6374
PA4310.564NLT PulseLarsen Antenna	FIXED IND 560UH 1.5A 1.68 OHM	0
PA4319.103NLT PulseLarsen Antenna	FIXED IND 10UH 1.92A 38 MOHM SMD	0
PM4343.401NLT PulseLarsen Antenna	FIXED IND 400NH 44A 1 MOHM SMD	0
PE-53933SNLT PulseLarsen Antenna	FIXED IND 24UH 2.74A 70 MOHM SMD	1346
PA5432.153NLT PulseLarsen Antenna	IND COMPOSITE 6060 15UH 6.0A	0
P1168.183NLT PulseLarsen Antenna	FIXED IND 18UH 2.8A 58 MOHM SMD	0
PA5121.231HLT PulseLarsen Antenna	FIXED IND 230NH 13A 0.65 MOHM	3193
PM4344.563NLT PulseLarsen Antenna	FIXED IND 56UH 7.8A 62 MOHM SMD	0
PA4306.473NLT PulseLarsen Antenna	FIXED IND 47UH 1A 640 MOHM SMD	0
PA3288.281HLT PulseLarsen Antenna	FIXED IND 280NH 64A 0.29 MOHM	0
PF0580.562NL PulseLarsen Antenna	FIXED IND 5.6UH 1.4A 90 MOHM SMD	0
PA4309.823NLT PulseLarsen Antenna	FIXED IND 82UH 3.9A 326 MOHM SMD	0

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