Fixed Inductors

Part Number	Description / PDF	Quantity
PE-53601NL PulseLarsen Antenna	FIXED IND 17.6UH 1A 125 MOHM SMD	0
PE-0603CD820JTT PulseLarsen Antenna	FIXED IND 82NH 400MA 540 MOHM	3028
PA4303.684NLT PulseLarsen Antenna	FIXED IND 680UH 370MA 1.72 OHM	0
P0250.223NL PulseLarsen Antenna	FIXED IND 22UH 3.5A 47 MOHM SMD	0
PG1083.253NL PulseLarsen Antenna	FIXED IND 1UH 11A 15 MOHM SMD	0
PM2202.561NLT PulseLarsen Antenna	FIXED IND 560NH 13.9A 9.54 MOHM	0
PM4342.471NLT PulseLarsen Antenna	FIXED IND 470NH 28A 1.5 MOHM SMD	0
PA4546.332NLT PulseLarsen Antenna	FIXED IND 3.3UH 2.3A 97 MOHM SMD	0
PG1083.323NLT PulseLarsen Antenna	FIXED IND 32UH 9A 21.5 MOHM SMD	0
P1167.273NLT PulseLarsen Antenna	FIXED IND 27UH 1.2A 130 MOHM SMD	3419
PA4341.161NLT PulseLarsen Antenna	FIXED IND 160NH 27A 1.9 MOHM SMD	0
PA5002.102NLT PulseLarsen Antenna	FIXED IND 1UH 10.5A 13.8MOHM SMD	8219
PA4307.394NLT PulseLarsen Antenna	FIXED IND 390UH 500MA 4.825 OHM	0
PA2202.211NLT PulseLarsen Antenna	FIXED IND 215NH 36A 0.48 MOHM	0
PA4342.473NLT PulseLarsen Antenna	FIXED IND 47UH 3A 167 MOHM SMD	3784
PA4310.683NLT PulseLarsen Antenna	FIXED IND 68UH 4.3A 225 MOHM SMD	4
PM4547.561NLT PulseLarsen Antenna	FIXED IND 560NH 5A 33 MOHM SMD	0
PA4305.472NLT PulseLarsen Antenna	FIXED IND 4.7UH 3A 81 MOHM SMD	0
PA4335.332NLT PulseLarsen Antenna	FIXED IND 3.3UH 1.7A 163 MOHM	0
PA4309.332NLT PulseLarsen Antenna	FIXED IND 3.3UH 19A 30 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