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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
SM2511-1R0MHF

SM2511-1R0MHF

ITG Electronics, Inc.

1UH, 20%, 9MOHM, 22AMP MAX. SMD

8000
SMHC2511-R68MHF

SMHC2511-R68MHF

ITG Electronics, Inc.

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

20000
L301314A-201LHF

L301314A-201LHF

ITG Electronics, Inc.

200UH, 75MOHM, 2.2A MAX. TOROIDA

24
SL2026-R055LHF

SL2026-R055LHF

ITG Electronics, Inc.

0.055UH, 15%, 0.47MOHM, 68AMP MA

0
PQ108081-101MHF

PQ108081-101MHF

ITG Electronics, Inc.

100UH, 20%, 22MOHM, 10AMP MAX. S

20
SM2511-2R2MHF

SM2511-2R2MHF

ITG Electronics, Inc.

2.2UH, 20%, 18MOHM, 14AMP MAX. S

8000
L201219-202MHF

L201219-202MHF

ITG Electronics, Inc.

1970UH, 20%, 195 MOHM DCR, 3.3A

20
SLM40327A-R18KHF

SLM40327A-R18KHF

ITG Electronics, Inc.

0.18UH, 20%, 0.85MOHM, 85AMP MAX

1800
SM1608A-1R5MHF

SM1608A-1R5MHF

ITG Electronics, Inc.

1.5UH, 20%, 25.3MOHM, 5.5AMP MAX

15000
AH2026A-R05LHF

AH2026A-R05LHF

ITG Electronics, Inc.

FIXED IND 50NH 53A 0.27 MOHM SMD

1700
SLM40328A-R39MHF

SLM40328A-R39MHF

ITG Electronics, Inc.

0.4UH, 20%, 0.85MOHM, 40AMP MAX.

0
PQ108081-390MHF

PQ108081-390MHF

ITG Electronics, Inc.

FIXED IND 39UH 15.6A 8.9 MOHM

20
SL2026B-R15MHF

SL2026B-R15MHF

ITG Electronics, Inc.

0.15UH, 20%, 0.27MOHM, 22AMP MAX

0
SM2518-8R2MHF

SM2518-8R2MHF

ITG Electronics, Inc.

8.2UH, 20%, 43.5MOHM, 6AMP MAX.

0
SL3732H-R10KHF

SL3732H-R10KHF

ITG Electronics, Inc.

0.1UH, 10%, 0.29MOHM, 95AMP MAX.

0
SM1608A-1R2MHF

SM1608A-1R2MHF

ITG Electronics, Inc.

1.2UH, 20%, 23MOHM, 7AMP MAX. SM

0
DHP106095S-4R7MHF

DHP106095S-4R7MHF

ITG Electronics, Inc.

4.7UH, 20%, 2.2MOHM, 65AMP MAX.

30
L101247A-120L

L101247A-120L

ITG Electronics, Inc.

0.12UH, 15%, 0.125MOHM, 107AMP M

300
SQ10B-1R0MHF

SQ10B-1R0MHF

ITG Electronics, Inc.

1UH, 20%, 4.05MOHM, 33AMP MAX. S

2100
AF13A-120K

AF13A-120K

ITG Electronics, Inc.

FIXED IND 120NH 66A 0.17 MOHM

100

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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