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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
AH3740A-100K

AH3740A-100K

ITG Electronics, Inc.

0.1UH, 10%, 0.145MOHM, 95AMP MAX

0
SLA40476B-80L

SLA40476B-80L

ITG Electronics, Inc.

80NH, 15%, 0.125MOHM, 150A MAX.

300
L301307-702K

L301307-702K

ITG Electronics, Inc.

7.0MH, 10%, 650MOHM, 0.7A MAX. T

9
SLM463710A-R45MHF

SLM463710A-R45MHF

ITG Electronics, Inc.

0.45UH, 20%, 0.35MOHM, 51AMP MAX

1400
L301314A-690LHF

L301314A-690LHF

ITG Electronics, Inc.

69.63UH, 18.5MOHM, 3.8A MAX. DIP

24
SLM463710A-R35MHF

SLM463710A-R35MHF

ITG Electronics, Inc.

0.35UH, 20%, 0.35MOHM, 65AMP MAX

350
AH3740A-330L

AH3740A-330L

ITG Electronics, Inc.

0.33UH, 15%, 0.145MOHM, 20AMP MA

1000
L101247A-330L

L101247A-330L

ITG Electronics, Inc.

0.33UH, 15%, 0.125MOHM, 36AMP MA

0
SQ10A-R47MHF

SQ10A-R47MHF

ITG Electronics, Inc.

0.47UH, 20%, 2.3MOHM, 40AMP MAX.

1800
PQ108081-560MHF

PQ108081-560MHF

ITG Electronics, Inc.

FIXED IND 56UH 12A 15 MOHM SMD

20
DHP106095S-390MHF

DHP106095S-390MHF

ITG Electronics, Inc.

39UH, 20%, 8.6MOHM, 18.1AMP MAX.

30
SL2026B-R11MHF

SL2026B-R11MHF

ITG Electronics, Inc.

0.11UH, 20%, 0.27MOHM, 32AMP MAX

3200
SQ4126-1R5MHF

SQ4126-1R5MHF

ITG Electronics, Inc.

1.5UH, 20%, 3.9MOHM, 22AMP MAX.

0
SL2026-R15MHF

SL2026-R15MHF

ITG Electronics, Inc.

0.15UH, 20%, 0.47MOHM, 20AMP MAX

800
SL1616A-R08MHF

SL1616A-R08MHF

ITG Electronics, Inc.

0.08UH, 20%, 0.32MOHM, 22AMP MAX

2000
SMHC2511-R22MHF

SMHC2511-R22MHF

ITG Electronics, Inc.

0.22UH, 20%, 2.5MOHM, 40AMP MAX.

10000
SLA40476B-90L

SLA40476B-90L

ITG Electronics, Inc.

90.0NH, 15%, 0.125MOHM, 130.0A M

0
SLM40327A-R36KHF

SLM40327A-R36KHF

ITG Electronics, Inc.

0.36UH, 20%, 0.85MOHM, 43AMP MAX

7200
L301308-222K

L301308-222K

ITG Electronics, Inc.

2.2MH, 10%, 270MOHM, 3.6A MAX. T

6
L301308-702K

L301308-702K

ITG Electronics, Inc.

7.0MH, 10%, 1100MOHM, 2.2A MAX.

6

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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