Fixed Inductors

Part Number	Description / PDF	Quantity
PCMB063T-3R3MS Susumu	FIXED IND 3.3UH 6A 30 MOHM SMD	8400
PCMB053T-1R0MS Susumu	FIXED IND 1UH 7A 14 MOHM SMD	34132
PCMB053T-R68MS Susumu	FIXED IND 680NH 8.5A 12 MOHM SMD	0
PCMB053T-3R3MS Susumu	FIXED IND 3.3UH 5A 38 MOHM SMD	5781
PCMB063T-1R5MS Susumu	FIXED IND 1.5UH 9A 15 MOHM SMD	980
PCMB104E-2R2MS Susumu	FIXED IND 2.2UH 14A 7 MOHM SMD	0
PCMB063T-1R2MS Susumu	FIXED IND 1.2UH 10A 12 MOHM SMD	0
PCMB053T-1R2MS Susumu	FIXED IND 1.2UH 6.5A 16 MOHM SMD	6331
PCMB042T-1R5MS Susumu	FIXED IND 1.5UH 4A 46 MOHM SMD	1455
PCMB042T-R22MS Susumu	FIXED IND 220NH 9A 6.6 MOHM SMD	2138
PCMB104E-6R8MS Susumu	FIXED IND 6.8UH 7.5A 24 MOHM SMD	0
PCMB104T-2R2MS Susumu	FIXED IND 2.2UH 12A 7 MOHM SMD	0
PCMB104T-2R0MS Susumu	FIXED IND 2UH 14A 5.8 MOHM SMD	0
PCMB104T-R22MS Susumu	FIXED IND 220NH 35A 1 MOHM SMD	86
PCMB104T-R56MT Susumu	FIXED IND 560NH 25A 1.8 MOHM SMD	0
PCMB042T-R47MS Susumu	FIXED IND 470NH 7A 14 MOHM SMD	2119
PCMB105T-R47MS Susumu	FIXED IND 470NH 36A 1.1 MOHM SMD	0
PCMB063T-R82MS Susumu	FIXED IND 820NH 13A 8 MOHM SMD	0
PCMB063T-R47MS Susumu	FIXED IND 470NH 17.5A 4.2 MOHM	146
PCMB063T-R22MS Susumu	FIXED IND 220NH 23A 2.8 MOHM SMD	1840

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