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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
L201204-333MHF

L201204-333MHF

ITG Electronics, Inc.

33750UH, 20%, 3480 MOHM DCR, 0.9

6
SL3732A-R28KHF

SL3732A-R28KHF

ITG Electronics, Inc.

0.28UH, 10%, 0.29MOHM, 29AMP MAX

780
SLM43328A-R51MHF

SLM43328A-R51MHF

ITG Electronics, Inc.

0.51UH, 20%, 0.93MOHM, 33AMP MAX

0
PQ108081-8R2MHF

PQ108081-8R2MHF

ITG Electronics, Inc.

FIXED IND 8.2UH 31A 2.5 MOHM SMD

20
SL3732C-R12KHF

SL3732C-R12KHF

ITG Electronics, Inc.

0.12UH, 10%, 0.29MOHM, 75AMP MAX

1950
SLA40476B-100L

SLA40476B-100L

ITG Electronics, Inc.

100NH, 15%, 0.125MOHM, 125A MAX.

1200
SQ4126-100MHF

SQ4126-100MHF

ITG Electronics, Inc.

10UH, 20%, 8.6MOHM, 5.3AMP MAX.

0
DHP106095S-100MHF

DHP106095S-100MHF

ITG Electronics, Inc.

10UH, 20%, 2.9MOHM, 34.1AMP MAX.

30
SLM40327A-R22MHF

SLM40327A-R22MHF

ITG Electronics, Inc.

0.22UH, 20%, 0.85MOHM, 70AMP MAX

0
AH42328A-R15KHF

AH42328A-R15KHF

ITG Electronics, Inc.

FIXED IND 150NH 73A 0.18 MOHM

90
SL2026B-R20MHF

SL2026B-R20MHF

ITG Electronics, Inc.

0.2UH, 20%, 0.27MOHM, 16AMP MAX.

0
SM1608A-R10MHF

SM1608A-R10MHF

ITG Electronics, Inc.

0.1UH, 20%, 3.65MOHM, 22AMP MAX.

0
PQ108081-120MHF

PQ108081-120MHF

ITG Electronics, Inc.

FIXED IND 12UH 26.8A 3.2 MOHM

20
AH43328B-R18KHF

AH43328B-R18KHF

ITG Electronics, Inc.

FIXED IND 180NH 70A 0.2 MOHM SMD

900
SLM534214A-2R2MHF

SLM534214A-2R2MHF

ITG Electronics, Inc.

2.2UH, 20%, 0.42MOHM, 14AMP MAX.

0
L301314A-151LHF

L301314A-151LHF

ITG Electronics, Inc.

150UH, 43MOHM, 2.6A MAX. TOROIDA

24
SL2026B-R05LHF

SL2026B-R05LHF

ITG Electronics, Inc.

0.05UH, 15%, 0.27MOHM, 72AMP MAX

0
SLM40327A-1R0MHF

SLM40327A-1R0MHF

ITG Electronics, Inc.

0.95UH, 20%, 0.85MOHM, 14AMP MAX

0
SQ4126-3R3MHF

SQ4126-3R3MHF

ITG Electronics, Inc.

3.3UH, 20%, 7.5MOHM, 14.5AMP MAX

700
L201203-262MHF

L201203-262MHF

ITG Electronics, Inc.

2632UH, 20%, 142.57 MOHM DCR, 1.

12

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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