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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
SBCP-14HY220B

SBCP-14HY220B

KEMET

FIXED IND 22UH 2.7A 60 MOHM TH

200
MPEV1D0630L1R5

MPEV1D0630L1R5

KEMET

METAL INDUCTOR , A, MOHM, AEC-Q2

0
SBC7-471-851

SBC7-471-851

KEMET

FIXED IND 470UH 850MA 550 MOHM

195
L1008Q4R7MDMIT

L1008Q4R7MDMIT

KEMET

FIXED IND 4.7UH 1.1A 160 MOHM

2000
SBC4-220-202

SBC4-220-202

KEMET

FIXED IND 22UH 2A 70 MOHM TH

61
MPXV1D1054L2R2

MPXV1D1054L2R2

KEMET

FIXED IND 2.2UH 18A 5.41MOHM SMD

182
TPI118082L150N

TPI118082L150N

KEMET

FIXED IND 150NH 50A 0.29 MOHM

372
MPXV1D1264L1R0

MPXV1D1264L1R0

KEMET

FIXED IND 1UH 32.2A 2.3MOHM SMD

5
MPXV1D1054L4R7

MPXV1D1054L4R7

KEMET

FIXED IND 4.7UH 11.3A 13.69 MOHM

497
L0603CR18JRMST

L0603CR18JRMST

KEMET

FIXED IND 180NH 300MA 1.3 OHM

3980
SBC1-4R7-202

SBC1-4R7-202

KEMET

FIXED IND 4.7UH 2A 50 MOHM TH

216
MPX1D0630L1R5

MPX1D0630L1R5

KEMET

FIXED IND 1.5UH 10.5A 12.7 MOHM

1000
MPX1D1264LR33

MPX1D1264LR33

KEMET

FIXED IND 330NH 45.6A 1.2 MOHM

250
MPXV1D1040L4R7

MPXV1D1040L4R7

KEMET

FIXED IND 4.7UH 10.3A 15.9MOHM

500
MPX1D1770L680

MPX1D1770L680

KEMET

FIXED IND 68UH 5.5A 79.5 MOHM

0
L0806B2R2JSWST

L0806B2R2JSWST

KEMET

FIXED IND 2.2UH 340MA 540 MOHM

1227
SBC1-2R2-272

SBC1-2R2-272

KEMET

FIXED IND 2.2UH 2.7A 40 MOHM TH

2925
SBC9-331-671

SBC9-331-671

KEMET

FIXED IND 330UH 670MA 580 MOHM

1986
MPXV1D1770L3R3

MPXV1D1770L3R3

KEMET

FIXED IND 3.3UH 28A 3.4 MOHM SMD

98
L0603B100KPWFT

L0603B100KPWFT

KEMET

FIXED IND 10UH 200MA 1.2 OHM SMD

2536

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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