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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
L0805C100MDWLT

L0805C100MDWLT

KEMET

FIXED IND 10UH 205MA 1 OHM SMD

3186
MPX1D1770L100

MPX1D1770L100

KEMET

FIXED IND 10UH 14.5A 12.2 MOHM

87
MPX1D1740L4R7

MPX1D1740L4R7

KEMET

FIXED IND 4.7UH 14.5A 10.4 MOHM

100
SBCP-87HY681H

SBCP-87HY681H

KEMET

FIXED IND 680UH 330MA 1.66 OHM

3175
MPXV1D2213L150

MPXV1D2213L150

KEMET

FIXED IND 15UH 27.5A 6.8 MOHM

86
SBCP-14HY103B

SBCP-14HY103B

KEMET

FIXED IND 10MH 170MA 10.86 OHM

161
MPX1D0530L3R3

MPX1D0530L3R3

KEMET

FIXED IND 3.3UH 5.5A 42.8 MOHM

863
MPX1D0624L6R8

MPX1D0624L6R8

KEMET

FIXED IND 6.8UH 4.3A 67.4 MOHM

85
L0806B101JSWST

L0806B101JSWST

KEMET

FIXED IND 100UH 80MA 8 OHM SMD

744
SBC2-221-411

SBC2-221-411

KEMET

FIXED IND 220UH 410MA 870 MOHM

91
SBCP-47HY1R2B

SBCP-47HY1R2B

KEMET

FIXED IND 1.2UH 3A 21 MOHM TH

594
SBCP-14HY1R2B

SBCP-14HY1R2B

KEMET

FIXED IND 1.2UH 5.2A 20 MOHM TH

200
L0806BR27JSWST

L0806BR27JSWST

KEMET

FIXED IND 270NH 510MA 210 MOHM

1967
MPX1D1770L2R2

MPX1D1770L2R2

KEMET

FIXED IND 2.2UH 31A 2.6 MOHM SMD

50
MPXV1D1040LR47

MPXV1D1040LR47

KEMET

FIXED IND 470NH 26.4A 2.4 MOHM

500
MPX1D0840L1R5

MPX1D0840L1R5

KEMET

FIXED IND 1.5UH 16.2A 6.8 MOHM

980
MPX1D0830L150

MPX1D0830L150

KEMET

FIXED IND 15UH 4.3A 94.6 MOHM

876
MPXV1D1250L4R7

MPXV1D1250L4R7

KEMET

FIXED IND 4.7UH 14.4A 10.1MOHM

247
MPXV1D0624L1R5

MPXV1D0624L1R5

KEMET

FIXED IND 1.5UH 8.1A 18.5 MOHM

1000
MPX1D2213L1R5

MPX1D2213L1R5

KEMET

FIXED IND 1.5UH 68A 1.2 MOHM SMD

28

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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