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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MPXV1D1040L2R2

MPXV1D1040L2R2

KEMET

FIXED IND 2.2UH 14.6A 7.9 MOHM

495
MPCH0740LR15

MPCH0740LR15

KEMET

FIXED IND 150NH 29A 0.93 MOHM

11
MPEV1D0630L100

MPEV1D0630L100

KEMET

METAL INDUCTOR , A, MOHM, AEC-Q2

0
MPXV1D0840L2R2

MPXV1D0840L2R2

KEMET

FIXED IND 2.2UH 14.3A 8.7 MOHM

2
MPX1D0840L330

MPX1D0840L330

KEMET

FIXED IND 33UH 3.4A 154.2 MOHM

952
MPX1D0624L100

MPX1D0624L100

KEMET

FIXED IND 10UH 3.3A 113.2 MOHM

960
SBC4-152-221

SBC4-152-221

KEMET

FIXED IND 1.5MH 220MA 3.24 OHM

188
MPXV1D1264L100

MPXV1D1264L100

KEMET

FIXED IND 10UH 12.2A 16.1 MOHM

618
MPX1D1770L330

MPX1D1770L330

KEMET

FIXED IND 33UH 7.5A 47.3 MOHM

98
MPXV1D1740L3R3

MPXV1D1740L3R3

KEMET

FIXED IND 3.3UH 16.5A 8.1 MOHM

100
MPX1D0618LR22

MPX1D0618LR22

KEMET

FIXED IND 220NH 13.7A 5.3 MOHM

879
L1008C4R7MDMIT

L1008C4R7MDMIT

KEMET

FIXED IND 4.7UH 1.1A 150 MOHM

2845
MPX1D0840L1R0

MPX1D0840L1R0

KEMET

FIXED IND 1UH 20.8A 4.2 MOHM SMD

599
SBC6-6R8-662

SBC6-6R8-662

KEMET

FIXED IND 6.8UH 6.6A 20 MOHM TH

1082
MPXV1D0630L4R7

MPXV1D0630L4R7

KEMET

FIXED IND 4.7UH 6.2A 36.7 MOHM

895
L0806B180JSWST

L0806B180JSWST

KEMET

FIXED IND 18UH 150MA 2.5 OHM SMD

3940
MPXV1D1264L6R8

MPXV1D1264L6R8

KEMET

FIXED IND 6.8UH 14A 12.3MOHM SMD

223
L0806B390JSWST

L0806B390JSWST

KEMET

FIXED IND 39UH 120MA 3.9 OHM SMD

1990
MPX1D1250L330

MPX1D1250L330

KEMET

FIXED IND 33UH 5.4A 72 MOHM SMD

217
SBC6-1R0-962

SBC6-1R0-962

KEMET

FIXED IND 1UH 9.6A 10 MOHM TH

1596

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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