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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MPXV1D0830LR47

MPXV1D0830LR47

KEMET

FIXED IND 470NH 24A 3.1 MOHM SMD

1000
L0806B330JSWST

L0806B330JSWST

KEMET

FIXED IND 33UH 125MA 3.6 OHM SMD

964
L0805B220MDWLT

L0805B220MDWLT

KEMET

FIXED INDUCTOR 22UH SMD

2207
MPC1250LR36C

MPC1250LR36C

KEMET

FIXED IND 360NH 38A 0.65 MOHM

900
MPXV1D0840L3R3

MPXV1D0840L3R3

KEMET

FIXED IND 3.3UH 11.3A 14MOHM SMD

893
L0805B3R3MDWLT

L0805B3R3MDWLT

KEMET

FIXED INDUCTOR 3.3UH SMD

3000
MPXV1D0624L6R8

MPXV1D0624L6R8

KEMET

FIXED IND 6.8UH 4.3A 67.4 MOHM

998
MPX1D0520LR47

MPX1D0520LR47

KEMET

FIXED IND 470NH 12A 7.8 MOHM SMD

890
SBC4-151-861

SBC4-151-861

KEMET

FIXED IND 150UH 860MA 360 MOHM

2999
MPXV1D1264L150

MPXV1D1264L150

KEMET

FIXED IND 15UH 9.8A 24.9MOHM SMD

0
MPXV1D1264L4R7

MPXV1D1264L4R7

KEMET

FIXED IND 4.7UH 17.1A 8.2 MOHM

237
MPX1D1770L150

MPX1D1770L150

KEMET

FIXED IND 15UH 12A 17.8 MOHM SMD

91
MPXV1D2213L1R5

MPXV1D2213L1R5

KEMET

FIXED IND 1.5UH 68A 1.2 MOHM SMD

99
MPXV1D1054L470

MPXV1D1054L470

KEMET

FIXED IND 47UH 3.7A 128.8 MOHM

478
MPX1D0830L330

MPX1D0830L330

KEMET

FIXED IND 33UH 2.8A 229.5 MOHM

3263
SBCP-47HY3R9B

SBCP-47HY3R9B

KEMET

FIXED IND 3.9UH 2.15A 40 MOHM TH

530
MPXV1D1740L1R0

MPXV1D1740L1R0

KEMET

FIXED IND 1UH 30A 2.3 MOHM SMD

100
SBC6-682-181

SBC6-682-181

KEMET

FIXED IND 6.8MH 180MA 8.92 OHM

972
MPCG1040LR36

MPCG1040LR36

KEMET

FIXED IND 360NH 25A 1.05 MOHM

161
SBCP-80HY122H

SBCP-80HY122H

KEMET

FIXED IND 1.2MH 320MA 2.6 OHM TH

500

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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