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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
SBC6-221-112

SBC6-221-112

KEMET

FIXED IND 220UH 1.1A 330 MOHM TH

395
MPXV1D0530L2R2

MPXV1D0530L2R2

KEMET

FIXED IND 2.2UH 7.3A 24.6 MOHM

989
MPX1D0530L1R5

MPX1D0530L1R5

KEMET

FIXED IND 1.5UH 8.6A 17.7 MOHM

570
MPX1D0650L1R5

MPX1D0650L1R5

KEMET

FIXED IND 1.5UH 13.2A 8.3 MOHM

2000
MPX1D1040L4R7

MPX1D1040L4R7

KEMET

FIXED IND 4.7UH 10.3A 15.9 MOHM

343
L0603C4N7SRMST

L0603C4N7SRMST

KEMET

FIXED IND 4.7NH 300MA 160 MOHM

483
MPX1D1264L220

MPX1D1264L220

KEMET

FIXED IND 22UH 8.2A 35.1 MOHM

500
MPXV1D0830LR68

MPXV1D0830LR68

KEMET

FIXED IND 680NH 20.1A 4.4 MOHM

924
MPC0750LR68C

MPC0750LR68C

KEMET

FIXED IND 680NH 18A 2.2 MOHM SMD

0
SBC3-470-142

SBC3-470-142

KEMET

FIXED IND 47UH 1.4A 120 MOHM TH

2897
SBCP-47HY120B

SBCP-47HY120B

KEMET

FIXED IND 12UH 1.4A 76 MOHM TH

552
L0805B101MDWLT

L0805B101MDWLT

KEMET

FIXED INDUCTOR 100UH SMD

2378
SBC2-680-871

SBC2-680-871

KEMET

FIXED IND 68UH 870MA 260 MOHM TH

500
MPXV1D0830L4R7

MPXV1D0830L4R7

KEMET

FIXED IND 4.7UH 7.7A 29.7 MOHM

987
L1008L2R2MDMIT

L1008L2R2MDMIT

KEMET

FIXED IND 2.2UH 1.2A 100 MOHM

3000
L0805C1R0MDWIT

L0805C1R0MDWIT

KEMET

FIXED IND 1UH 700MA 190 MOHM SMD

12
SBC8-472-391

SBC8-472-391

KEMET

FIXED IND 4.7MH 390MA 3.2 OHM TH

0
SBC4-3R3-642

SBC4-3R3-642

KEMET

FIXED IND 3.3UH 6.4A 20 MOHM TH

0
SBC4-2R7-662

SBC4-2R7-662

KEMET

FIXED IND 2.7UH 6.6A 20 MOHM TH

2985
L0603CR47JRMST

L0603CR47JRMST

KEMET

FIXED IND 470NH 150MA 2.6 OHM

0

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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