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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
SBC4-1R0-742

SBC4-1R0-742

KEMET

FIXED IND 1UH 7.4A 10 MOHM TH

140
MPXV1D0530L220

MPXV1D0530L220

KEMET

FIXED IND 22UH 2A 341.2 MOHM SMD

946
SBC9-682-141

SBC9-682-141

KEMET

FIXED IND 6.8MH 140MA 12.7 OHM

175
MPX1D1770L1R5

MPX1D1770L1R5

KEMET

FIXED IND 1.5UH 38A 1.8 MOHM SMD

100
MPLC1040L3R3

MPLC1040L3R3

KEMET

FIXED IND 3.3UH 8.8A 14 MOHM SMD

0
L0603B4R7MPWFT

L0603B4R7MPWFT

KEMET

FIXED IND 4.7UH 295MA 500 MOHM

2900
SBC3-101-961

SBC3-101-961

KEMET

FIXED IND 100UH 960MA 260 MOHM

3355
MPX1D1250LR68

MPX1D1250LR68

KEMET

FIXED IND 680NH 32.7A 2 MOHM SMD

230
MPX1D1264LR22

MPX1D1264LR22

KEMET

FIXED IND 220NH 53A 0.9 MOHM SMD

194
SBC9-330-252

SBC9-330-252

KEMET

FIXED IND 33UH 2.5A 60 MOHM TH

227
MPX1D0630LR47

MPX1D0630LR47

KEMET

FIXED IND 470NH 18.7A 4 MOHM SMD

590
SBC9-102-451

SBC9-102-451

KEMET

FIXED IND 1MH 450MA 1.53 OHM TH

180
MPX1D0618L4R7

MPX1D0618L4R7

KEMET

FIXED IND 4.7UH 3.4A 83.4 MOHM

52
MPX1D0630L220

MPX1D0630L220

KEMET

FIXED IND 22UH 2.7A 186.3 MOHM

930
SBCP-11HY1R5H

SBCP-11HY1R5H

KEMET

FIXED IND 1.5UH 5A 20 MOHM TH

396
L0805R100MPWRT

L0805R100MPWRT

KEMET

FIXED IND 10UH 125MA 360 MOHM

6714
L0603CR12JRMST

L0603CR12JRMST

KEMET

FIXED IND 120NH 300MA 1.2 OHM

1456
SBCP-11HY471H

SBCP-11HY471H

KEMET

FIXED IND 470UH 660MA 760 MOHM

400
MPXV1D1235L4R7

MPXV1D1235L4R7

KEMET

FIXED IND 4.7UH 10.9A 16.4MOHM

500
SBC2-1R0-612

SBC2-1R0-612

KEMET

FIXED IND 1UH 6.1A 10 MOHM TH

3741

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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