Fixed Inductors

Part Number	Description / PDF	Quantity
PE-0805CD470GTT PulseLarsen Antenna	FIXED IND 46.6NH 500MA 310 MOHM	1569
PG0926.872NLT PulseLarsen Antenna	FIXED IND 8.7UH 11A 8 MOHM SMD	0
PM4548.102NLT PulseLarsen Antenna	FIXED IND 1UH 11A 13.5 MOHM SMD	1395
PE-0603CD040GTT PulseLarsen Antenna	FIXED IND 4.55NH 700MA 106 MOHM	0
PA4305.684NLT PulseLarsen Antenna	FIXED IND 680UH 250MA 11.765 OHM	0
PA4309.274NLT PulseLarsen Antenna	FIXED IND 270UH 2.12A 985 MOHM	0
PA4341.561NLT PulseLarsen Antenna	FIXED IND 560NH 16.5A 5 MOHM SMD	3972
PA5003.151NLT PulseLarsen Antenna	FIXED IND 150NH 22.2A 2.31 MOHM	0
PG1083.153NL PulseLarsen Antenna	FIXED IND 15.2UH 14A 9.2 MOHM	2129990
PA4342.333ANLT PulseLarsen Antenna	FIXED IND 33UH 3.5A 91 MOHM SMD	0
PM4341.221NLT PulseLarsen Antenna	FIXED IND 220NH 23A 2.8 MOHM SMD	0
PE-53145NL PulseLarsen Antenna	FIXED IND 220UH 1.4A 140 MOHM TH	1286
PE-0805CD181JTT PulseLarsen Antenna	FIXED IND 179.6NH 400MA 640 MOHM	0
PA4309.153NLT PulseLarsen Antenna	FIXED IND 15UH 9.3A 68 MOHM SMD	0
PA4341.222NLT PulseLarsen Antenna	FIXED IND 2.2UH 8A 20 MOHM SMD	5924
PM4340.333NLT PulseLarsen Antenna	FIXED IND 33UH 1.6A 440 MOHM SMD	1709
PA2891.211HL PulseLarsen Antenna	FIXED IND 210NH 71A 0.22 MOHM	1277
PA5041.221HLT PulseLarsen Antenna	FIXED IND 220NH 40A 0.29 MOHM	3185
PA4331.152NLT PulseLarsen Antenna	FIXED IND 1.5UH 2.5A 74 MOHM SMD	0
PM2203.151NLT PulseLarsen Antenna	FIXED IND 150NH 22.2A 2.31 MOHM	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