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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MPXV1D1054LR68

MPXV1D1054LR68

KEMET

FIXED IND 680NH 27.6A 2.3 MOHM

500
L0603C10NJRMST

L0603C10NJRMST

KEMET

FIXED IND 10NH 300MA 260 MOHM

1490
SBC3-680-112

SBC3-680-112

KEMET

FIXED IND 68UH 1.1A 190 MOHM TH

3869
SBC8-680-322

SBC8-680-322

KEMET

FIXED IND 68UH 3.2A 60 MOHM TH

0
SBC8-471-112

SBC8-471-112

KEMET

FIXED IND 470UH 1.1A 420 MOHM TH

118
SBCP-14HY150B

SBCP-14HY150B

KEMET

FIXED IND 15UH 2.8A 50 MOHM TH

200
MPXV1D0630LR15

MPXV1D0630LR15

KEMET

FIXED IND 150NH 27.6A 1.9 MOHM

970
MPEV1D1040LR68

MPEV1D1040LR68

KEMET

METAL INDUCTOR , A, MOHM, AEC-Q2

0
L0603B220KDWFT

L0603B220KDWFT

KEMET

FIXED IND 22UH 230MA 1 OHM SMD

2889
MPXV1D0624LR68

MPXV1D0624LR68

KEMET

FIXED IND 680NH 12.6A 7.8 MOHM

1000
SBCP-14HY681B

SBCP-14HY681B

KEMET

FIXED IND 680UH 670MA 900 MOHM

159
SBCP-47HY470B

SBCP-47HY470B

KEMET

FIXED IND 47UH 730MA 267 MOHM TH

578
SBC9-681-551

SBC9-681-551

KEMET

FIXED IND 680UH 550MA 1.05 OHM

1485
MPXV1D0840LR33

MPXV1D0840LR33

KEMET

FIXED IND 330NH 27.7A 2.4 MOHM

998
MPC1250LR50C

MPC1250LR50C

KEMET

FIXED IND 500NH 35A 0.8 MOHM SMD

1000
SBC8-101-242

SBC8-101-242

KEMET

FIXED IND 100UH 2.4A 90 MOHM TH

849
SBCP-14HY152B

SBCP-14HY152B

KEMET

FIXED IND 1.5MH 470MA 1.52 OHM

169
L0805C4R7MPWST

L0805C4R7MPWST

KEMET

FIXED IND 4.7UH 140MA 400 MOHM

5295
L0806B270JSWST

L0806B270JSWST

KEMET

FIXED IND 27UH 130MA 3.2 OHM SMD

6335
MPXV1D1740L100

MPXV1D1740L100

KEMET

FIXED IND 10UH 9.5A 21.7 MOHM

100

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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