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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
L0806B4R7JSWST

L0806B4R7JSWST

KEMET

FIXED IND 4.7UH 270MA 780 MOHM

1847
SBCP-11HY680H

SBCP-11HY680H

KEMET

FIXED IND 68UH 1.8A 120 MOHM TH

382
MPXV1D0630L1R5

MPXV1D0630L1R5

KEMET

FIXED IND 1.5UH 10.5A 12.7 MOHM

1000
MPXV1D0618LR47

MPXV1D0618LR47

KEMET

FIXED IND 470NH 10.7A 8.5 MOHM

1000
L1007C4R7MPWST

L1007C4R7MPWST

KEMET

FIXED IND 4.7UH 240MA 130 MOHM

1444
MPEV1D1040L4R7

MPEV1D1040L4R7

KEMET

METAL INDUCTOR , A, MOHM, AEC-Q2

0
MPLCG0530LR33

MPLCG0530LR33

KEMET

FIXED IND 330NH 10.3A 7.3 MOHM

3495
L0805R100KPWST

L0805R100KPWST

KEMET

FIXED IND 10UH 100MA 500 MOHM

9355
SBCP-80HY681H

SBCP-80HY681H

KEMET

FIXED IND 680UH 500MA 1.4 OHM TH

0
MPX1D1235LR68

MPX1D1235LR68

KEMET

FIXED IND 680NH 25.9A 2.9 MOHM

500
MPLC0730L4R7

MPLC0730L4R7

KEMET

FIXED IND 4.7UH 5A 41 MOHM SMD

5114
MPX1D0830L1R0

MPX1D0830L1R0

KEMET

FIXED IND 1UH 17.6A 5.7 MOHM SMD

824
L0806B470JSWST

L0806B470JSWST

KEMET

FIXED IND 47UH 120MA 3.9 OHM SMD

1825
SBC2-3R3-352

SBC2-3R3-352

KEMET

FIXED IND 3.3UH 3.5A 30 MOHM TH

3049
SBC4-470-162

SBC4-470-162

KEMET

FIXED IND 47UH 1.6A 110 MOHM TH

1425
SBCP-47HY150B

SBCP-47HY150B

KEMET

FIXED IND 15UH 1.25A 87 MOHM TH

590
MPXV1D1770L4R7

MPXV1D1770L4R7

KEMET

FIXED IND 4.7UH 23.5A 4.8 MOHM

0
MPX1D0840LR68

MPX1D0840LR68

KEMET

FIXED IND 680NH 22.4A 3.6 MOHM

960
L0603B100MPWFT

L0603B100MPWFT

KEMET

FIXED IND 10UH 200MA 1.2 OHM SMD

17
SBC6-100-462

SBC6-100-462

KEMET

FIXED IND 10UH 4.6A 30 MOHM TH

1573

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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