Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	TFL0816-5N6 Susumu	FIXED IND 5.6NH 400MA 500 MOHM	0
	HPL1005-1N8 Susumu	FIXED IND 1.8NH 1A 140 MOHM SMD	0
	TFL0816-82N Susumu	FIXED IND 82NH 120MA 6 OHM SMD	0
	PCMC053T-3R3MN Susumu	FIXED IND 3.3UH 5A 38 MOHM SMD	0
	HPL1005-3N3 Susumu	FIXED IND 3.3NH 700MA 250 MOHM	0
	PCMC063T-1R0MN Susumu	FIXED IND 1UH 11A 10 MOHM SMD	0
	HPL1005-1N1 Susumu	FIXED IND 1.1NH 1.5A 50 MOHM SMD	0
	PCMC135T-3R3MF Susumu	FIXED IND 3.3UH 15A 9.2 MOHM SMD	0
	PCMC063T-R47MN Susumu	FIXED IND 470NH 17.5A 4.2 MOHM	0
	HPL1005-4N7 Susumu	FIXED IND 4.7NH 500MA 500 MOHM	0
	TFL0816-1N5 Susumu	FIXED IND 1.5NH 1A 100 MOHM SMD	0
	TFL0816-2N2 Susumu	FIXED IND 2.2NH 800MA 150 MOHM	0
	HPL0603-4N7 Susumu	FIXED IND 4.7NH 250MA 1 OHM SMD	0
	HPL0603-2N2 Susumu	FIXED IND 2.2NH 350MA 500 MOHM	0
	TFL0816-10N Susumu	FIXED IND 10NH 300MA 1 OHM SMD	0
	HPL0603-6N8 Susumu	FIXED IND 6.8NH 220MA 1 OHM SMD	0
	PCMC063T-R22MN Susumu	FIXED IND 220NH 23A 2.5 MOHM SMD	0
	PCMC063T-3R3MN Susumu	FIXED IND 3.3UH 6A 30 MOHM SMD	0
	PCMB135T-R68MS Susumu	FIXED IND 680NH SMD	0
	PCMB135T-R36MS Susumu	FIXED IND 360NH 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