Fixed Inductors

Part Number	Description / PDF	Quantity
MHA0730NSG2R2M Mentech Technology USA Inc.	FIXED IND 2.2UH 7A 17.5MOHM SMD	1500
MHA0420NSGR47M Mentech Technology USA Inc.	FIXED IND 0.47UH 7A 14MOHM SMD	3000
MHA0730SGR15MA Mentech Technology USA Inc.	FIXED IND 0.15UH 35A 0.9 MOHM	1500
MHA0730NSGR47M Mentech Technology USA Inc.	FIXED IND 0.47UH 18A 4.1 MOHM	1500
MHA0530NSG1R5M Mentech Technology USA Inc.	FIXED IND 1.5UH 6A 22 MOHM SMD	2000
MHW2618HBSG4R7K Mentech Technology USA Inc.	FIXED IND 4.7UH 28A 2.86 MOHM	40
MHW1807SG2R0KA Mentech Technology USA Inc.	FIXED IND 2UH 25A 3 MOHM SMD	250
MHW2012SG100KA Mentech Technology USA Inc.	FIXED IND 10UH 10A 3.9 MOHM SMD	120
MHW2009SG7R0KA Mentech Technology USA Inc.	FIXED IND 7UH 7A 7MOHM SMD	250
MHA0724NSG1R0M Mentech Technology USA Inc.	FIXED IND 1UH 9A 13.5 MOHM SMD	1500
MHW2014SG120K Mentech Technology USA Inc.	FIXED IND 12UH 12A 5 MOHM SMD	70
MHW2012SG150KA Mentech Technology USA Inc.	FIXED IND 15UH 10A 3.9 MOHM SMD	120
MHA0718NSGR47M Mentech Technology USA Inc.	FIXED IND 0.47UH 11A 8.4 MOHM	2000
MHW2618HBSG100K Mentech Technology USA Inc.	FIXED IND 10UH 28A 2.86 MOHM SMD	40
MHW1306SG1R0M Mentech Technology USA Inc.	FIXED IND 1UH 20A 1.18M OHM SMD	450
MHA1040NSGR15M Mentech Technology USA Inc.	FIXED IND 0.15UH 48A 0.55 MOHM	800
MHA0730NSG1R0M Mentech Technology USA Inc.	FIXED IND 1UH 10A 7.5MOHM SMD	1500
MHW1807SG4R0K Mentech Technology USA Inc.	FIXED IND 4UH 18A 3 MOHM SMD	250
MCEP125SG1R0M Mentech Technology USA Inc.	FIXED IND 1UH 16.5A 2.5 MOHM SMD	450
MHA0530NSGR68M Mentech Technology USA Inc.	FIXED IND 0.68UH 8.5A 9.8 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