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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
L1207C1R0MPWST

L1207C1R0MPWST

KEMET

FIXED IND 1UH 1.075A 60 MOHM SMD

0
MPXV1D0530LR15

MPXV1D0530LR15

KEMET

FIXED IND 150NH 22A 2.8 MOHM SMD

987
MPXV1D1054LR47

MPXV1D1054LR47

KEMET

FIXED IND 470NH 30.9A 1.84MOHM

440
L0603B1R0MPWFT

L0603B1R0MPWFT

KEMET

FIXED IND 1UH 620MA 190 MOHM SMD

3299
SBCP-14HY101B

SBCP-14HY101B

KEMET

FIXED IND 100UH 1.5A 140 MOHM TH

0
MPCG0730LR40

MPCG0730LR40

KEMET

FIXED IND 400NH 16A 2.6 MOHM SMD

1993
MPXV1D1040LR22

MPXV1D1040LR22

KEMET

FIXED IND 220NH 32.7A 1.6 MOHM

500
MPX1D1264L1R5

MPX1D1264L1R5

KEMET

FIXED IND 1.5UH 28.8A 2.9 MOHM

240
MPX1D1040LR68

MPX1D1040LR68

KEMET

FIXED IND 680NH 23.1A 3.2 MOHM

497
MPXV1D1040L330

MPXV1D1040L330

KEMET

FIXED IND 33UH 3.7A 119.7 MOHM

486
MPXV1D1770L150

MPXV1D1770L150

KEMET

FIXED IND 15UH 12A 17.8 MOHM SMD

100
MPXV1D0650L6R8

MPXV1D0650L6R8

KEMET

FIXED IND 6.8UH 5.7A 44.2 MOHM

1000
TPI078060L068N

TPI078060L068N

KEMET

FIXED IND 68NH 53A 0.31 MOHM SMD

0
L0805B4R7MDWLT

L0805B4R7MDWLT

KEMET

FIXED INDUCTOR 4.7UH SMD

3000
SBC3-100-362

SBC3-100-362

KEMET

FIXED IND 10UH 3.6A 30 MOHM TH

3841
SBCP-47HY1R5B

SBCP-47HY1R5B

KEMET

FIXED IND 1.5UH 2.85A 24 MOHM TH

525
MPXV1D1770L101

MPXV1D1770L101

KEMET

FIXED IND 100UH 4.5A 110.3 MOHM

61
SBC7-151-172

SBC7-151-172

KEMET

FIXED IND 150UH 1.7A 160 MOHM TH

191
SBC1-221-391

SBC1-221-391

KEMET

FIXED IND 220UH 390MA 1.2 OHM TH

1999
L0805R101MPWRT

L0805R101MPWRT

KEMET

FIXED IND 100UH 50MA 4 OHM SMD

8779

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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