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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MPXV1D0624L3R3

MPXV1D0624L3R3

KEMET

FIXED IND 3.3UH 6A 33.8 MOHM SMD

915
L0805C1R0MDMIT

L0805C1R0MDMIT

KEMET

FIXED IND 1UH 1A 140 MOHM SMD

2950
L0603B220MDWFT

L0603B220MDWFT

KEMET

FIXED IND 22UH 230MA 1 OHM SMD

887
L0806BR12JSWST

L0806BR12JSWST

KEMET

FIXED IND 120NH 610MA 130 MOHM

2000
MPLC1040L1R5

MPLC1040L1R5

KEMET

FIXED IND 1.5UH 12.4A 7 MOHM SMD

990
MPCG1040LR45

MPCG1040LR45

KEMET

FIXED IND 450NH 25A 1.1 MOHM SMD

243
SBCP-11HY2R2H

SBCP-11HY2R2H

KEMET

FIXED IND 2.2UH 4.7A 20 MOHM TH

400
MPXV1D1054L330

MPXV1D1054L330

KEMET

FIXED IND 33UH 4.6A 80.5MOHM SMD

89
MPX1D0520LR33

MPX1D0520LR33

KEMET

FIXED IND 330NH 13.4A 6.2 MOHM

954
MPX1D1235L4R7

MPX1D1235L4R7

KEMET

FIXED IND 4.7UH 10.9A 16.4 MOHM

456
MPX1D0530LR47

MPX1D0530LR47

KEMET

FIXED IND 470NH 13.8A 6.9 MOHM

888
MPX1D2213L100

MPX1D2213L100

KEMET

FIXED IND 10UH 34A 4.4 MOHM SMD

41
MPXV1D1250L100

MPXV1D1250L100

KEMET

FIXED IND 10UH 10.1A 20.6 MOHM

239
SBC1-680-651

SBC1-680-651

KEMET

FIXED IND 68UH 650MA 420 MOHM TH

496
SBC4-102-291

SBC4-102-291

KEMET

FIXED IND 1MH 290MA 2.15 OHM TH

279
MPXV1D1250LR47

MPXV1D1250LR47

KEMET

FIXED IND 470NH 34.8A 1.8 MOHM

250
MPXV1D0530L1R5

MPXV1D0530L1R5

KEMET

FIXED IND 1.5UH 8.6A 17.7 MOHM

979
MPX1D0830L220

MPX1D0830L220

KEMET

FIXED IND 22UH 3.6A 134.5 MOHM

938
SBC9-4R7-562

SBC9-4R7-562

KEMET

FIXED IND 4.7UH 5.6A 20 MOHM TH

220
MPXV1D0650L4R7

MPXV1D0650L4R7

KEMET

FIXED IND 4.7UH 6.7A 32MOHM SMD

1000

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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