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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
L1210R4R7MDWIT

L1210R4R7MDWIT

KEMET

FIXED IND 4.7UH 1.25A 100 MOHM

4490
MPX1D0618LR10

MPX1D0618LR10

KEMET

FIXED IND 100NH 18.9A 2.8 MOHM

878
SBCP-87HY3R3H

SBCP-87HY3R3H

KEMET

FIXED IND 3.3UH 3.2A 30 MOHM TH

12
L0603B470KDWFT

L0603B470KDWFT

KEMET

FIXED IND 47UH 140MA 2.5 OHM SMD

11208
SBC1-1R5-292

SBC1-1R5-292

KEMET

FIXED IND 1.5UH 2.9A 30 MOHM TH

496
MPX1D0650L100

MPX1D0650L100

KEMET

FIXED IND 10UH 4.8A 61.4 MOHM

338
MPX1D1250L2R2

MPX1D1250L2R2

KEMET

FIXED IND 2.2UH 21A 4.8 MOHM SMD

250
MPC0750LR60C

MPC0750LR60C

KEMET

FIXED IND 600NH 17A 2.3 MOHM SMD

3916
SBC4-6R8-452

SBC4-6R8-452

KEMET

FIXED IND 6.8UH 4.5A 30 MOHM TH

2987
SBCP-87HY100H

SBCP-87HY100H

KEMET

FIXED IND 10UH 2.3A 50 MOHM TH

450
L0806C1R0MDMIT

L0806C1R0MDMIT

KEMET

FIXED IND 1UH 1.3A 120 MOHM SMD

3000
MPXV1D2213L330

MPXV1D2213L330

KEMET

FIXED IND 33UH 17.5A 16 MOHM SMD

38
SBCP-47HY101B

SBCP-47HY101B

KEMET

FIXED IND 100UH 500MA 584 MOHM

470
MPLC0730L1R5

MPLC0730L1R5

KEMET

FIXED IND 1.5UH 8.6A 15 MOHM SMD

0
L0603C47NJRMST

L0603C47NJRMST

KEMET

FIXED IND 47NH 300MA 700 MOHM

4754
L0603B220KPWFT

L0603B220KPWFT

KEMET

FIXED IND 22UH 130MA 3.7 OHM SMD

33159
MPCV1060LR68

MPCV1060LR68

KEMET

FIXED IND 680NH 32A 1.54 MOHM

998
MPLCV0654L220

MPLCV0654L220

KEMET

FIXED IND 22UH 3A 94 MOHM SMD

703
L0806B1R8JSWST

L0806B1R8JSWST

KEMET

FIXED IND 1.8UH 345MA 480 MOHM

1980
SBCP-47HY820B

SBCP-47HY820B

KEMET

FIXED IND 82UH 530MA 519 MOHM TH

1082

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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