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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MPLCG0630L1R5

MPLCG0630L1R5

KEMET

FIXED IND 1.5UH 9.9A 15 MOHM SMD

1779
L0603C100KSMST

L0603C100KSMST

KEMET

FIXED IND 10UH 5MA 2.55 OHM SMD

3906
L0806BR18JSWST

L0806BR18JSWST

KEMET

FIXED IND 180NH 560MA 150 MOHM

1980
MPXV1D0624LR10

MPXV1D0624LR10

KEMET

FIXED IND 100NH 26.6A 1.8 MOHM

1000
SBC9-6R8-492

SBC9-6R8-492

KEMET

FIXED IND 6.8UH 4.9A 30 MOHM TH

1990
L0603C3N9SRMST

L0603C3N9SRMST

KEMET

FIXED IND 3.9NH 300MA 140 MOHM

410
SBCP-87HY220H

SBCP-87HY220H

KEMET

FIXED IND 22UH 1.9A 80 MOHM TH

498
MPX1D1264L150

MPX1D1264L150

KEMET

FIXED IND 15UH 9.8A 24.9 MOHM

501
SBC2-220-132

SBC2-220-132

KEMET

FIXED IND 22UH 1.3A 110 MOHM TH

2207
MPX1D0530LR33

MPX1D0530LR33

KEMET

FIXED IND 330NH 16A 5.2 MOHM SMD

1000
MPC1040LR56C

MPC1040LR56C

KEMET

FIXED IND 560NH 23A 1.3 MOHM SMD

916
MPX1D1040L150

MPX1D1040L150

KEMET

FIXED IND 15UH 5.7A 51.2 MOHM

500
SBC1-331-341

SBC1-331-341

KEMET

FIXED IND 330UH 340MA 1.9 OHM TH

490
SBC8-152-581

SBC8-152-581

KEMET

FIXED IND 1.5MH 580MA 1.3 OHM TH

1000
L0603C1N0SRMST

L0603C1N0SRMST

KEMET

FIXED IND 1NH 300MA 50 MOHM SMD

5116
MPXV1D0840L6R8

MPXV1D0840L6R8

KEMET

FIXED IND 6.8UH 7.3A 33.4 MOHM

990
MPXV1D2213L2R2

MPXV1D2213L2R2

KEMET

FIXED IND 2.2UH 59A 1.4 MOHM SMD

48
SBCP-14HY4R7B

SBCP-14HY4R7B

KEMET

FIXED IND 4.7UH 3.6A 30 MOHM TH

198
L1210R470MDWIT

L1210R470MDWIT

KEMET

FIXED IND 47UH 480MA 670 MOHM

1079
MPXV1D2213LR68

MPXV1D2213LR68

KEMET

FIXED IND 680NH 78A 0.83 MOHM

97

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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