Fixed Inductors

Part Number	Description / PDF	Quantity
L0603B220MPWFT KEMET	FIXED IND 22UH 130MA 3.7 OHM SMD	1955
MPXV1D0830L6R8 KEMET	FIXED IND 6.8UH 6.8A 37.9 MOHM	735
SBCP-80HY820H KEMET	FIXED IND 82UH 1.3A 240 MOHM TH	1000
MPXV1D0624LR22 KEMET	FIXED IND 220NH 19.4A 3.3 MOHM	1000
MPXV1D1770L1R0 KEMET	FIXED IND 1UH 38A 1.8 MOHM SMD	90
TPI077050L105N KEMET	FIXED INDUCTOR 105NH SMD	1000
SBC8-4R7-922 KEMET	FIXED IND 4.7UH 9.2A 10 MOHM TH	148
MPXV1D0624L1R0 KEMET	FIXED IND 1UH 10.8A 10.5 MOHM	1000
SBCP-47HY681B KEMET	FIXED IND 680UH 190MA 3.5 OHM TH	447
SBCP-11HY101H KEMET	FIXED IND 100UH 1.3A 190 MOHM TH	1535
MPXV1D0530LR22 KEMET	FIXED IND 220NH 18.4A 3.9 MOHM	1000
SBC1-150-162 KEMET	FIXED IND 15UH 1.6A 100 MOHM TH	480
SBCP-14HY151B KEMET	FIXED IND 150UH 1.3A 200 MOHM TH	155
L0806B1R0JSWST KEMET	FIXED IND 1UH 385MA 380 MOHM SMD	1990
L0806BR56JSWST KEMET	FIXED IND 560NH 410MA 290 MOHM	1930
TPI078060L056N KEMET	FIXED IND 56NH 53A 0.31 MOHM SMD	0
MPX1D0624LR33 KEMET	FIXED IND 330NH 17.2A 4.2 MOHM	1000
L0603B2R2MDWFT KEMET	FIXED IND 2.2UH 560MA 170 MOHM	2887
SBC6-3R3-852 KEMET	FIXED IND 3.3UH 8.5A 10 MOHM TH	555
MPEV1D1040L3R3 KEMET	METAL INDUCTOR , A, MOHM, AEC-Q2	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