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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
L0806B100JSWST

L0806B100JSWST

KEMET

FIXED IND 10UH 215MA 1.2 OHM SMD

699
MPC1040LR45C

MPC1040LR45C

KEMET

FIXED IND 450NH 25A 1.1 MOHM SMD

328
L0805C4R7MDMIT

L0805C4R7MDMIT

KEMET

FIXED IND 4.7UH 700MA 280 MOHM

2783
MPX1D0530LR15

MPX1D0530LR15

KEMET

FIXED IND 150NH 22A 2.8 MOHM SMD

883
MPLC0730L2R2

MPLC0730L2R2

KEMET

FIXED IND 2.2UH 7.3A 19 MOHM SMD

1050
MPCH0740LR36E

MPCH0740LR36E

KEMET

FIXED IND 360NH 23A 1.42 MOHM

1799
SBCP-47HY271B

SBCP-47HY271B

KEMET

FIXED IND 270UH 300MA 1.3 OHM TH

574
MPXV1D0520LR33

MPXV1D0520LR33

KEMET

FIXED IND 330NH 13.4A 6.2 MOHM

1000
L0603B100MDWFT

L0603B100MDWFT

KEMET

FIXED IND 10UH 380MA 360 MOHM

1300
SBC1-330-102

SBC1-330-102

KEMET

FIXED IND 33UH 1A 220 MOHM TH

326
MPX1D2213LR47

MPX1D2213LR47

KEMET

FIXED IND 470NH 90A 0.483 MOHM

0
L0806BR33JSWST

L0806BR33JSWST

KEMET

FIXED IND 330NH 490MA 210 MOHM

2000
L0603C18NJRMST

L0603C18NJRMST

KEMET

FIXED IND 18NH 300MA 350 MOHM

4052
MPXV1D1054L220

MPXV1D1054L220

KEMET

FIXED IND 22UH 5.7A 54.05 MOHM

1000
SBC8-150-532

SBC8-150-532

KEMET

FIXED IND 15UH 5.3A 30 MOHM TH

145
MPX1D2213L680

MPX1D2213L680

KEMET

FIXED IND 68UH 12.5A 30.8 MOHM

0
L0603C100MPMST

L0603C100MPMST

KEMET

FIXED IND 10UH 50MA 850 MOHM SMD

591
SBC8-820-262

SBC8-820-262

KEMET

FIXED IND 82UH 2.6A 70 MOHM TH

139
MPXV1D0650LR68

MPXV1D0650LR68

KEMET

FIXED IND 680NH 18.8A 4.1 MOHM

1000
MPX1D1235LR47

MPX1D1235LR47

KEMET

FIXED IND 470NH 28.9A 2.3 MOHM

500

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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