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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MPXV1D0840LR22

MPXV1D0840LR22

KEMET

FIXED IND 220NH 35.4A 1.5 MOHM

1000
SBC6-472-241

SBC6-472-241

KEMET

FIXED IND 4.7MH 240MA 5.92 OHM

548
SBC7-222-421

SBC7-222-421

KEMET

FIXED IND 2.2MH 420MA 2.18 OHM

195
MPX1D1250L470

MPX1D1250L470

KEMET

FIXED IND 47UH 4.5A 105.4 MOHM

124
MPXV1D0840L1R5

MPXV1D0840L1R5

KEMET

FIXED IND 1.5UH 16.2A 6.8 MOHM

998
MPX1D1250LR47

MPX1D1250LR47

KEMET

FIXED IND 470NH 34.8A 1.8 MOHM

250
MPX1D1770L4R7

MPX1D1770L4R7

KEMET

FIXED IND 4.7UH 23.5A 4.8 MOHM

100
L1210R1R0MDWIT

L1210R1R0MDWIT

KEMET

FIXED IND 1UH 2A 55 MOHM SMD

1066
MPEV1D1040L6R8

MPEV1D1040L6R8

KEMET

METAL INDUCTOR , A, MOHM, AEC-Q2

0
MPXV1D1250L220

MPXV1D1250L220

KEMET

FIXED IND 22UH 6.7A 46.2MOHM SMD

250
MPX1D1770L101

MPX1D1770L101

KEMET

FIXED IND 100UH 4.5A 110.3 MOHM

31
SBCP-47HY102B

SBCP-47HY102B

KEMET

FIXED IND 1MH 150MA 6 OHM TH

8524
MPX1D1264L6R8

MPX1D1264L6R8

KEMET

FIXED IND 6.8UH 14A 12.3 MOHM

245
MPXV1D0840L470

MPXV1D0840L470

KEMET

FIXED IND 47UH 2.8A 226.7 MOHM

750
MPXV1D0624LR15

MPXV1D0624LR15

KEMET

FIXED IND 150NH 23.2A 2.3 MOHM

950
MPLC0730LR75

MPLC0730LR75

KEMET

FIXED IND 750NH SMD

0
SBC4-101-102

SBC4-101-102

KEMET

FIXED IND 100UH 1A 260 MOHM TH

2860
MPCV1060L1R0

MPCV1060L1R0

KEMET

FIXED IND 1UH 26A 1.87 MOHM SMD

975
SBCP-14HY100B

SBCP-14HY100B

KEMET

FIXED IND 10UH 3A 40 MOHM TH

185
L4018C2R2MDWDT

L4018C2R2MDWDT

KEMET

FIXED IND 2.2UH 1.44A 60 MOHM

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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