Fixed Inductors

Part Number	Description / PDF	Quantity
P0751.152NL PulseLarsen Antenna	FIXED IND 1.5UH 6.4A 12 MOHM SMD	0
PE-1008CD680GTT PulseLarsen Antenna	FIXED IND 68NH 1A 70 MOHM SMD	895
PE-53809NL PulseLarsen Antenna	FIXED IND 256UH 250MA 2.2 OHM TH	1440
PE-0805CD121GTT PulseLarsen Antenna	FIXED IND 119.7NH 400MA 510 MOHM	0
PM5430.682NLT PulseLarsen Antenna	IND COMP AECQ 4030 6.8UH 3.9A	0
PE-0603CD3N6JTT PulseLarsen Antenna	FIXED IND 3.6NH 700MA 70 MOHM	0
PM4546.601NLT PulseLarsen Antenna	FIXED IND 600NH 5.3A 26 MOHM SMD	0
PA4341.102NLT PulseLarsen Antenna	FIXED IND 1UH 11A 10 MOHM SMD	11794
PG0702.222NL PulseLarsen Antenna	FIXED IND 2.2UH 15.9A 3.3 MOHM	0
PA2729.113NL PulseLarsen Antenna	FIXED IND 10.9UH 12.5A 5.8 MOHM	0
PF0464.104NL PulseLarsen Antenna	FIXED IND 100UH 850MA 505 MOHM	2700
PE-0603CD391JTT PulseLarsen Antenna	FIXED IND 390NH 130MA 2.9 OHM	0
PA4309.102NLT PulseLarsen Antenna	FIXED IND 1UH 20A 19 MOHM SMD	0
PA4334.272NLT PulseLarsen Antenna	FIXED IND 2.7UH 1.48A 110 MOHM	0
PA4547.561NLT PulseLarsen Antenna	FIXED IND 560NH 5A 33 MOHM SMD	2658
PG0936.471NL PulseLarsen Antenna	FIXED IND 470NH 40A 0.87 MOHM	0
PA5432.472NLT PulseLarsen Antenna	IND COMPOSITE 6060 4.7UH 10.5A	0
PA4333.221NLT PulseLarsen Antenna	FIXED IND 220NH 14A 4 MOHM SMD	0
PE-0402CL2N7STT PulseLarsen Antenna	FIXED IND 2.7NH 300MA 200 MOHM	19788
PE-1008CD560GTT PulseLarsen Antenna	FIXED IND 56NH 1A 120 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