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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
SMHC2511-100MHF

SMHC2511-100MHF

ITG Electronics, Inc.

10UH, 20%, 102MOHM, 7AMP MAX. SM

1000
PQ108081-500MHF

PQ108081-500MHF

ITG Electronics, Inc.

50UH, 20%, 11.5MOHM, 16.2AMP MAX

20
SL2218A-R055LHF

SL2218A-R055LHF

ITG Electronics, Inc.

0.055UH, 15%, 0.2MOHM, 63AMP MAX

100
SLM40327A-R72MHF

SLM40327A-R72MHF

ITG Electronics, Inc.

0.728UH, 20%, 0.85MOHM, 20AMP MA

0
SL1616B-R05LHF

SL1616B-R05LHF

ITG Electronics, Inc.

0.05UH, 15%, 1MOHM, 29AMP MAX. S

0
SLM474712A-1R2MHF

SLM474712A-1R2MHF

ITG Electronics, Inc.

1.2UH, 20%, 0.69MOHM, 23AMP MAX.

0
SMHC2511-1R5MHF

SMHC2511-1R5MHF

ITG Electronics, Inc.

1.5UH, 20%, 14MOHM, 18AMP MAX. S

0
SL2026B-R10MHF

SL2026B-R10MHF

ITG Electronics, Inc.

0.1UH, 20%, 0.27MOHM, 35AMP MAX.

800
SM1608A-1R0MHF

SM1608A-1R0MHF

ITG Electronics, Inc.

1UH, 20%, 19.2MOHM, 7AMP MAX. SM

30000
AHA47436A-150L

AHA47436A-150L

ITG Electronics, Inc.

COUPLING INDUCTOR FOR TLVR ,150.

0
SLM43328A-R60MHF

SLM43328A-R60MHF

ITG Electronics, Inc.

0.6UH, 20%, 0.93MOHM, 28AMP MAX.

0
L201204-101MHF

L201204-101MHF

ITG Electronics, Inc.

106UH, 20%, 12.5 MOHM DCR, 16A D

6
SLM463710A-1R0MHF

SLM463710A-1R0MHF

ITG Electronics, Inc.

1UH, 20%, 0.35MOHM, 19AMP MAX. S

0
L101247A-100L

L101247A-100L

ITG Electronics, Inc.

0.1UH, 15%, 0.125MOHM, 129AMP MA

300
SLM463710A-R60MHF

SLM463710A-R60MHF

ITG Electronics, Inc.

0.6UH, 20%, 0.35MOHM, 37AMP MAX.

0
SM2511-R68MHF

SM2511-R68MHF

ITG Electronics, Inc.

0.68UH, 20%, 5MOHM, 25AMP MAX. S

2000
L201219-400MHF

L201219-400MHF

ITG Electronics, Inc.

40.2UH, 20%, 4.8 MOHM DCR, 24A D

20
SLM474712A-R56MHF

SLM474712A-R56MHF

ITG Electronics, Inc.

0.56UH, 20%, 0.69MOHM, 54AMP MAX

0
DHP106095S-101MHF

DHP106095S-101MHF

ITG Electronics, Inc.

FIXED IND 100UH 11.5A 15.5 MOHM

30
SLA40476B-150L

SLA40476B-150L

ITG Electronics, Inc.

150NH, 15%, 0.125MOHM, 83A MAX.

1200

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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