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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
L0806C4R7MDMIT

L0806C4R7MDMIT

KEMET

FIXED IND 4.7UH 900MA 200 MOHM

2958
MPC1040LR88C

MPC1040LR88C

KEMET

FIXED IND 880NH 17A 2.3 MOHM SMD

0
MPCV1260L1R0

MPCV1260L1R0

KEMET

FIXED IND 1UH 32A 1.65 MOHM SMD

299
MPC1260LR45

MPC1260LR45

KEMET

FIXED IND 450NH SMD

1000
SBC2-101-671

SBC2-101-671

KEMET

FIXED IND 100UH 670MA 410 MOHM

704
MPLC1040L4R7

MPLC1040L4R7

KEMET

FIXED IND 4.7UH 8A 19 MOHM SMD

0
SBCP-87HY151H

SBCP-87HY151H

KEMET

FIXED IND 150UH 790MA 390 MOHM

500
MPCH0730LR24

MPCH0730LR24

KEMET

FIXED IND 240NH 23A 1.2 MOHM SMD

909
MPX1D1235LR22

MPX1D1235LR22

KEMET

FIXED IND 220NH 35.2A 1.6 MOHM

474
SBCP-47HY100B

SBCP-47HY100B

KEMET

FIXED IND 10UH 1.6A 67 MOHM TH

2747
MPX1D0650L3R3

MPX1D0650L3R3

KEMET

FIXED IND 3.3UH 8.7A 18.9 MOHM

986
L0806BR47JSWST

L0806BR47JSWST

KEMET

FIXED IND 470NH 430MA 260 MOHM

1805
SBC2-272-101

SBC2-272-101

KEMET

FIXED IND 2.7MH 100MA 11.6 OHM

150
SBCP-87HY331H

SBCP-87HY331H

KEMET

FIXED IND 330UH 500MA 920 MOHM

320
MPXV1D1740L150

MPXV1D1740L150

KEMET

FIXED IND 15UH 7.5A 35.2 MOHM

85
MPXV1D1250L150

MPXV1D1250L150

KEMET

FIXED IND 15UH 8.2A 30.8MOHM SMD

244
MPXV1D1235L1R5

MPXV1D1235L1R5

KEMET

FIXED IND 1.5UH 17.9A 6MOHM SMD

500
L0603C12NJRMST

L0603C12NJRMST

KEMET

FIXED IND 12NH 300MA 280 MOHM

1150
SBCP-11HY330H

SBCP-11HY330H

KEMET

FIXED IND 33UH 2.3A 70 MOHM TH

400
SBCP-11HY331H

SBCP-11HY331H

KEMET

FIXED IND 330UH 740MA 600 MOHM

399

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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