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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
SBC3-222-191

SBC3-222-191

KEMET

FIXED IND 2.2MH 190MA 5.62 OHM

313
MPX1D0530L1R0

MPX1D0530L1R0

KEMET

FIXED IND 1UH 10.7A 11.5 MOHM

394
MPXV1D2213L3R3

MPXV1D2213L3R3

KEMET

FIXED IND 3.3UH 54A 1.8 MOHM SMD

29
SBC6-330-272

SBC6-330-272

KEMET

FIXED IND 33UH 2.7A 60 MOHM TH

1333
MPX1D1770LR47

MPX1D1770LR47

KEMET

FIXED IND 470NH 52.5A 1.0005MOHM

69
SBCP-14HY680B

SBCP-14HY680B

KEMET

FIXED IND 68UH 1.7A 110 MOHM TH

199
MPXV1D1040L1R0

MPXV1D1040L1R0

KEMET

FIXED IND 1UH 21.1A 3.8 MOHM SMD

500
L0402C6N2SRMST

L0402C6N2SRMST

KEMET

FIXED IND 6.2NH 300MA 250 MOHM

4849
TPI128080L210N

TPI128080L210N

KEMET

FIXED IND 210NH 50A 0.29 MOHM

776
MPX1D0830L1R5

MPX1D0830L1R5

KEMET

FIXED IND 1.5UH 14A 9.1 MOHM SMD

995
L0402C15NJRMST

L0402C15NJRMST

KEMET

FIXED IND 15NH 300MA 460 MOHM

11189
MPX1D0520LR15

MPX1D0520LR15

KEMET

FIXED IND 150NH 16.9A 3.9 MOHM

910
MPXV1D1040L470

MPXV1D1040L470

KEMET

FIXED IND 47UH 3A 182.6MOHM SMD

500
MPX1D2213LR68

MPX1D2213LR68

KEMET

FIXED IND 680NH 78A 0.828 MOHM

49
SBC9-472-181

SBC9-472-181

KEMET

FIXED IND 4.7MH 180MA 8.2 OHM TH

118
MPX1D0840L6R8

MPX1D0840L6R8

KEMET

FIXED IND 6.8UH 7.3A 33.4 MOHM

903
MPXV1D2213L680

MPXV1D2213L680

KEMET

FIXED IND 68UH 12.5A 30.8 MOHM

2
MPX1D0624L4R7

MPX1D0624L4R7

KEMET

FIXED IND 4.7UH 4.9A 50.6 MOHM

990
L1008C1R0MDMIT

L1008C1R0MDMIT

KEMET

FIXED IND 1UH 1.4A 80 MOHM SMD

2997
MPX1D1740L330

MPX1D1740L330

KEMET

FIXED IND 33UH 5A 82.3 MOHM

98

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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