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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
SLM463710A-R52MHF

SLM463710A-R52MHF

ITG Electronics, Inc.

0.525UH, 20%, 0.35MOHM, 41AMP MA

1050
L201203-542MHF

L201203-542MHF

ITG Electronics, Inc.

5400UH, 20%, 402 MOHM DCR, 0.85A

12
SL3732H-R28KHF

SL3732H-R28KHF

ITG Electronics, Inc.

0.28UH, 10%, 0.29MOHM, 35AMP MAX

1300
SM1608A-3R3MHF

SM1608A-3R3MHF

ITG Electronics, Inc.

3.3UH, 20%, 70.6MOHM, 4AMP MAX.

3000
SMHC2511-R20MHF

SMHC2511-R20MHF

ITG Electronics, Inc.

0.2UH, 20%, 2.4MOHM, 41AMP MAX.

1000
L201203-120MHF

L201203-120MHF

ITG Electronics, Inc.

120UH, 20%, 11.6 MOHM DCR, 5.5A

12
SLM474712A-1R0MHF

SLM474712A-1R0MHF

ITG Electronics, Inc.

1UH, 20%, 0.69MOHM, 30AMP MAX. S

0
SLA40476B-70L

SLA40476B-70L

ITG Electronics, Inc.

70.0NH, 15%, 0.125MOHM, 170A MAX

300
SM1608A-2R2MHF

SM1608A-2R2MHF

ITG Electronics, Inc.

2.2UH, 20%, 40.2MOHM, 5AMP MAX.

15000
SLM40327A-R47MHF

SLM40327A-R47MHF

ITG Electronics, Inc.

0.475UH, 20%, 0.85MOHM, 32AMP MA

0
SM2518-1R0MHF

SM2518-1R0MHF

ITG Electronics, Inc.

1UH, 20%, 5.6MOHM, 17AMP MAX. SM

10500
SM1608A-R68MHF

SM1608A-R68MHF

ITG Electronics, Inc.

0.68UH, 20%, 11.7MOHM, 9AMP MAX.

24000
SLA40476B-120L

SLA40476B-120L

ITG Electronics, Inc.

120NH, 15%, 0.125MOHM, 105A MAX.

1200
SL2026-R10MHF

SL2026-R10MHF

ITG Electronics, Inc.

0.1UH, 20%, 0.47MOHM, 35AMP MAX.

3200
DHP106095S-680MHF

DHP106095S-680MHF

ITG Electronics, Inc.

68UH, 20%, 14.7MOHM, 12.9AMP MAX

30
PQ108081-6R8MHF

PQ108081-6R8MHF

ITG Electronics, Inc.

FIXED IND 6.8UH 31A 2.5 MOHM SMD

20
SQ4126-R56MHF

SQ4126-R56MHF

ITG Electronics, Inc.

0.56UH, 20%, 1.2MOHM, 36AMP MAX.

700
AH43328B-R30KHF

AH43328B-R30KHF

ITG Electronics, Inc.

FIXED IND 300NH 70A 0.2 MOHM SMD

450
DHP106095S-3R3MHF

DHP106095S-3R3MHF

ITG Electronics, Inc.

3.3UH, 20%, 2.2MOHM, 89AMP MAX.

30
SLM463710A-R22MHF

SLM463710A-R22MHF

ITG Electronics, Inc.

0.22UH, 20%, 0.35MOHM, 96AMP MAX

0

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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