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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
SL3732A-R22KHF

SL3732A-R22KHF

ITG Electronics, Inc.

0.22UH, 10%, 0.29MOHM, 43AMP MAX

780
DHP106095S-150MHF

DHP106095S-150MHF

ITG Electronics, Inc.

15UH, 20%, 3.2MOHM, 28.1AMP MAX.

30
SQ4126-1R0MHF

SQ4126-1R0MHF

ITG Electronics, Inc.

1UH, 20%, 2.2MOHM, 26AMP MAX. SM

3500
SM5018-R68MHF

SM5018-R68MHF

ITG Electronics, Inc.

0.68UH, 20%, 1.4MOHM, 54AMP MAX.

500
SMHC2511-R33MHF

SMHC2511-R33MHF

ITG Electronics, Inc.

0.33UH, 20%, 3.5MOHM, 30AMP MAX.

8000
L301308-452K

L301308-452K

ITG Electronics, Inc.

4.5MH, 10%, 636MOHM, 2.8A MAX. T

6
PQ108081-620MHF

PQ108081-620MHF

ITG Electronics, Inc.

FIXED IND 62UH 12A 15 MOHM SMD

20
SLM534214A-R62MHF

SLM534214A-R62MHF

ITG Electronics, Inc.

0.625UH, 20%, 0.42MOHM, 62AMP MA

500
SM2518-100MHF

SM2518-100MHF

ITG Electronics, Inc.

10UH, 20%, 67.9MOHM, 5AMP MAX. S

0
AH3740A-120K

AH3740A-120K

ITG Electronics, Inc.

0.12UH, 10%, 0.145MOHM, 78AMP MA

1400
AH3740A-70K

AH3740A-70K

ITG Electronics, Inc.

0.07UH, 10%, 0.145MOHM, 124.0AMP

100
SLM40327A-R82MHF

SLM40327A-R82MHF

ITG Electronics, Inc.

0.835UH, 20%, 0.85MOHM, 16AMP MA

0
L301314A-251LHF

L301314A-251LHF

ITG Electronics, Inc.

250UH, 112MOHM, 2A MAX. TOROIDAL

24
AH43328B-R105KHF

AH43328B-R105KHF

ITG Electronics, Inc.

FIXED IND 105NH 70A 0.2 MOHM SMD

0
L201219-630MHF

L201219-630MHF

ITG Electronics, Inc.

62.8UH, 20%, 9.1 MOHM DCR, 17A D

20
AH4724-R21KHF

AH4724-R21KHF

ITG Electronics, Inc.

0.215UH, 10%, 0.48MOHM, 54AMP MA

80000
SM5018-1R0MHF

SM5018-1R0MHF

ITG Electronics, Inc.

1UH, 20%, 2.1MOHM, 50AMP MAX. SM

12500
DHP106095S-560MHF

DHP106095S-560MHF

ITG Electronics, Inc.

56UH, 20%, 14.7MOHM, 15.2AMP MAX

30
SL3732A-R30KHF

SL3732A-R30KHF

ITG Electronics, Inc.

0.3UH, 10%, 0.29MOHM, 28AMP MAX.

650
AH3740A-180K

AH3740A-180K

ITG Electronics, Inc.

0.18UH, 10%, 0.145MOHM, 49AMP MA

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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