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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MPX1D0630LR33

MPX1D0630LR33

KEMET

FIXED IND 330NH 21.1A 3.2 MOHM

987
L0806CR47MDMIT

L0806CR47MDMIT

KEMET

FIXED IND 470NH 1.6A 75 MOHM SMD

3000
MPCH0740LR26

MPCH0740LR26

KEMET

FIXED IND 260NH SMD

2000
MPXV1D1040L150

MPXV1D1040L150

KEMET

FIXED IND 15UH 5.7A 51.2MOHM SMD

489
MPXV1D0530L1R0

MPXV1D0530L1R0

KEMET

FIXED IND 1UH 10.7A 11.5 MOHM

975
MPX1D0830LR68

MPX1D0830LR68

KEMET

FIXED IND 680NH 20.1A 4.4 MOHM

980
SBCP-80HY2R2H

SBCP-80HY2R2H

KEMET

FIXED IND 2.2UH 4A 30 MOHM TH

485
SBC3-4R7-422

SBC3-4R7-422

KEMET

FIXED IND 4.7UH 4.2A 20 MOHM TH

3609
L1008S1R0MDMIT

L1008S1R0MDMIT

KEMET

FIXED IND 1UH 1.2A 115 MOHM SMD

3000
MPLCG0530L1R0

MPLCG0530L1R0

KEMET

FIXED IND 1UH 7.4A 14.6 MOHM SMD

0
SBCP-14HY471B

SBCP-14HY471B

KEMET

FIXED IND 470UH 800MA 540 MOHM

0
L0805B680MDWLT

L0805B680MDWLT

KEMET

FIXED INDUCTOR 68UH SMD

2978
SBC1-151-431

SBC1-151-431

KEMET

FIXED IND 150UH 570MA 650 MOHM

495
L0806B5R6JSWST

L0806B5R6JSWST

KEMET

FIXED IND 5.6UH 255MA 880 MOHM

1713
TPI128080L180N

TPI128080L180N

KEMET

FIXED IND 180NH 50A 0.29 MOHM

795
MPX1D0840L150

MPX1D0840L150

KEMET

FIXED IND 15UH 5.2A 65 MOHM SMD

837
SBC2-331-341

SBC2-331-341

KEMET

FIXED IND 330UH 340MA 1.4 OHM TH

180
MPX1D0624LR47

MPX1D0624LR47

KEMET

FIXED IND 470NH 15.4A 5.2 MOHM

900
SBC9-471-601

SBC9-471-601

KEMET

FIXED IND 470UH 600MA 820 MOHM

0
MPX1D0530L100

MPX1D0530L100

KEMET

FIXED IND 10UH 3.1A 140.1 MOHM

819

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

TypeFunctional CharacteristicsApplication Examples
Wirewound InductorsHigh precision, high current handling, low resistancePower supplies, DC-DC converters
Chip InductorsCompact SMD package, stable performance at high frequenciesMobile devices, RF circuits
Ferrite Bead InductorsEffective high-frequency noise suppressionEMI filtering in digital circuits
Thin-Film InductorsUltra-compact, high Q-factor, tight tolerance5G 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

ParameterDescriptionImportance
Inductance (L)Measured in henrys (H), determines energy storage capacityDefines filtering/energy storage performance
Rated Current (Irated)Maximum DC current before saturationPrevents core saturation and failure
DC Resistance (DCR)Resistance of coil windingsAffects efficiency and thermal performance
Self-Resonant Frequency (SRF)Frequency where inductor behaves as capacitorLimits effective operating frequency range
Q FactorQuality factor indicating efficiencyHigher 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

ManufacturerRepresentative ProductKey Features
MurataLQH3NPN100M10 H, 1.2A, 1.8 1.4mm chip inductor
TDKMLZ2012A100T100MHz SRF, 1.0 1.25mm for RF circuits
VishayIHLP2525CZER1R0M1 H, 12A, composite construction
Coilcraft0402DC-103J10 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
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