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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
L0806B3R9JSWST

L0806B3R9JSWST

KEMET

FIXED IND 3.9UH 275MA 740 MOHM

1536
SBC1-102-211

SBC1-102-211

KEMET

FIXED IND 1MH 210MA 4.9 OHM TH

51
MPXV1D0618L3R3

MPXV1D0618L3R3

KEMET

FIXED IND 3.3UH 4A 61.5 MOHM SMD

996
MPC1055L1R0C

MPC1055L1R0C

KEMET

FIXED IND 1UH 18.5A 2.3 MOHM SMD

214
SBCP-47HY6R8B

SBCP-47HY6R8B

KEMET

FIXED IND 6.8UH 1.9A 52 MOHM TH

2987
MPCV1260L1R5

MPCV1260L1R5

KEMET

FIXED IND 1.5UH 28A 2.31MOHM SMD

284
MPC0730LR20C

MPC0730LR20C

KEMET

FIXED IND 200NH 23A 1.2 MOHM SMD

1777
MPX1D1250LR22

MPX1D1250LR22

KEMET

FIXED IND 220NH 42.7A 1.2 MOHM

250
MPXV1D1740LR47

MPXV1D1740LR47

KEMET

FIXED IND 470NH 34A 1.8 MOHM SMD

100
MPXV1D2213L100

MPXV1D2213L100

KEMET

FIXED IND 10UH 34A 4.4 MOHM SMD

44
SBC3-471-491

SBC3-471-491

KEMET

FIXED IND 470UH 490MA 1.02 OHM

1294
MPX1D0830L3R3

MPX1D0830L3R3

KEMET

FIXED IND 3.3UH 8.9A 22.3 MOHM

990
SBCP-80HY331H

SBCP-80HY331H

KEMET

FIXED IND 330UH 700MA 750 MOHM

0
SBC3-472-121

SBC3-472-121

KEMET

FIXED IND 4.7MH 120MA 11.4 OHM

193
MPXV1D1250L3R3

MPXV1D1250L3R3

KEMET

FIXED IND 3.3UH 16.8A 7.4 MOHM

249
MPEV1D1040L1R5

MPEV1D1040L1R5

KEMET

METAL INDUCTOR , A, MOHM, AEC-Q2

0
MPXV1D0840LR68

MPXV1D0840LR68

KEMET

FIXED IND 680NH 22.4A 3.6 MOHM

1000
MPX1D0520L100

MPX1D0520L100

KEMET

FIXED IND 10UH 2.2A 222.8 MOHM

597
MPEV1D0630LR47

MPEV1D0630LR47

KEMET

METAL INDUCTOR , A, MOHM, AEC-Q2

0
SBC9-560-182

SBC9-560-182

KEMET

FIXED IND 56UH 1.8A 100 MOHM TH

220

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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