Fixed Inductors

Part Number	Description / PDF	Quantity
PE-0402CD121JTT PulseLarsen Antenna	FIXED IND 120NH 90MA 2.7 OHM SMD	0
PA4303.105NLT PulseLarsen Antenna	FIXED IND 1MH 320MA 2.67 OHM SMD	0
PA4306.563NLT PulseLarsen Antenna	FIXED IND 56UH 950MA 810 MOHM	0
PD0120.102NLT PulseLarsen Antenna	FIXED IND 1.2UH 15.4A 2 MOHM SMD	0
PA4346.103ANLT PulseLarsen Antenna	FIXED IND 10UH 9A 22 MOHM SMD	3370
PA4332.472NLT PulseLarsen Antenna	FIXED IND 4.7UH 2.85A 108 MOHM	0
P1252.222NL PulseLarsen Antenna	FIXED IND 2.2UH 12A 6.1 MOHM SMD	0
PA2607.121NLT PulseLarsen Antenna	FIXED IND 115NH 41A 0.29 MOHM	0
PA4300.273NLT PulseLarsen Antenna	FIXED IND 27UH 800MA 188.5 MOHM	0
PA4304.473NLT PulseLarsen Antenna	FIXED IND 47UH 1.8A 75 MOHM SMD	0
P0847NL PulseLarsen Antenna	FIXED IND 10UH 5A 25 MOHM TH	1408
PB2020.153NLT PulseLarsen Antenna	FIXED IND 15UH 9.7A 13 MOHM SMD	58
PA4302.682NLT PulseLarsen Antenna	FIXED IND 6.8UH 4A 36.8 MOHM SMD	0
PA5007.152NLT PulseLarsen Antenna	FIXED IND 1.5UH 15.3A 8.25 MOHM	0
PM4548.682NLT PulseLarsen Antenna	FIXED IND 6.8UH 4A 72 MOHM SMD	0
PA4343.152NLT PulseLarsen Antenna	FIXED IND 1.5UH 27A 3 MOHM SMD	0
PG0085.472NL PulseLarsen Antenna	FIXED IND 4.7UH 860MA 100 MOHM	0
PE-1008CD681GTT PulseLarsen Antenna	FIXED IND 680NH 230MA 1.47 OHM	0
PA4349.233ANLT PulseLarsen Antenna	FIXED IND 23UH 22A 11 MOHM SMD	0
PE-0402CL6N8JTT PulseLarsen Antenna	FIXED IND 6.8NH 300MA 300 MOHM	19310

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