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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
SM1608A-R47MHF

SM1608A-R47MHF

ITG Electronics, Inc.

0.47UH, 20%, 10.5MOHM, 9.5AMP MA

6000
SL3732H-R12KHF

SL3732H-R12KHF

ITG Electronics, Inc.

0.12UH, 10%, 0.29MOHM, 81AMP MAX

0
AH3740A-60L

AH3740A-60L

ITG Electronics, Inc.

0.06UH, 15%, 0.145MOHM, 155.0AMP

500
AH43328B-R22KHF

AH43328B-R22KHF

ITG Electronics, Inc.

FIXED IND 220NH 70A 0.2 MOHM SMD

900
L101247A-80L

L101247A-80L

ITG Electronics, Inc.

0.08UH, 15%, 0.125MOHM, 155AMP M

0
SL1616B-R08MHF

SL1616B-R08MHF

ITG Electronics, Inc.

0.08UH, 20%, 1MOHM, 22AMP MAX. S

0
SLA40476B-220L

SLA40476B-220L

ITG Electronics, Inc.

220NH, 15%, 0.125MOHM, 60A MAX.

300
SL1616B-R10MHF

SL1616B-R10MHF

ITG Electronics, Inc.

0.1UH, 20%, 1MOHM, 17AMP MAX. SM

0
L301308-182K

L301308-182K

ITG Electronics, Inc.

1.8MH, 10%, 205MOHM, 4.0A. MAX.

6
AF13A-90K

AF13A-90K

ITG Electronics, Inc.

FIXED IND 90NH 66A 0.17 MOHM SMD

8100
SMHC2511-R15MHF

SMHC2511-R15MHF

ITG Electronics, Inc.

0.15UH, 20%, 1.9MOHM, 52AMP MAX.

1000
SLQ36385A-1R0MHF

SLQ36385A-1R0MHF

ITG Electronics, Inc.

1.0UH,12.0A,0.95M,INDUCTOR

1000
SLA40476B-470L

SLA40476B-470L

ITG Electronics, Inc.

0.47UH, 15%, 0.125MOHM, 27AMP MA

300
SMHC2511-8R2MHF

SMHC2511-8R2MHF

ITG Electronics, Inc.

8.2UH, 20%, 64MOHM, 7.5AMP MAX.

4000
PQ108081-471MHF

PQ108081-471MHF

ITG Electronics, Inc.

470UH, 20%, 76.5MOHM, 4.5AMP MAX

20
SM2518-5R6MHF

SM2518-5R6MHF

ITG Electronics, Inc.

5.6UH, 20%, 32.7MOHM, 7.5AMP MAX

0
SLM40328A-R47MHF

SLM40328A-R47MHF

ITG Electronics, Inc.

0.47UH, 20%, 0.85MOHM, 33AMP MAX

0
L301307-452K

L301307-452K

ITG Electronics, Inc.

4.5MH, 10%, 350MOHM, 0.92A MAX.

9
L201204-452MHF

L201204-452MHF

ITG Electronics, Inc.

4500UH, 20%, 640 MOHM DCR, 2.5A

6
SL1616A-R05LHF

SL1616A-R05LHF

ITG Electronics, Inc.

0.05UH, 15%, 0.32MOHM, 29AMP MAX

2000

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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