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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
ISC1812RV2R2J

ISC1812RV2R2J

Vishay / Dale

FIXED IND 2.2UH 390MA 460 MOHM

0
IHD3EB561L

IHD3EB561L

Vishay / Dale

FIXED IND 560UH 1A 504 MOHM TH

0
IMC1812BN82NM

IMC1812BN82NM

Vishay / Dale

FIXED IND 82NH 450MA 400 MOHM

0
IMC1812BN120K

IMC1812BN120K

Vishay / Dale

FIXED IND 12UH 225MA 2 OHM SMD

0
ISC1210SY180K

ISC1210SY180K

Vishay / Dale

FIXED IND 18UH 155MA 2.7 OHM SMD

0
IHLP1212BZEVR22M5A

IHLP1212BZEVR22M5A

Vishay / Dale

FIXED IND 0.22 UH 8.83A 13.74 MO

0
ISC1812EBR39K

ISC1812EBR39K

Vishay / Dale

FIXED IND 390NH 394MA 450 MOHM

0
ISC1210EB82NM

ISC1210EB82NM

Vishay / Dale

FIXED IND 82NH 460MA 450 MOHM

0
IHLP5050CEER2R2M01

IHLP5050CEER2R2M01

Vishay / Dale

FIXED IND 2.2UH 16A 8 MOHM SMD

8937
ISC1812RV180J

ISC1812RV180J

Vishay / Dale

FIXED IND 18UH 238MA 1.24 OHM

0
IMC1812EB1R5J

IMC1812EB1R5J

Vishay / Dale

FIXED IND 1.5UH 410MA 600 MOHM

0
ISC1812RQ101J

ISC1812RQ101J

Vishay / Dale

FIXED IND 100UH 147MA 3.25 OHM

0
ISC1210ER47NM

ISC1210ER47NM

Vishay / Dale

FIXED IND 47NH 495MA 260 MOHM

0
ISC1812ER821J

ISC1812ER821J

Vishay / Dale

FIXED IND 820UH 72MA 13.5 OHM

0
IHLP4040DZER470M11

IHLP4040DZER470M11

Vishay / Dale

FIXED IND 47UH 3.3A 145 MOHM SMD

4503
IHLP5050FDER1R8M51

IHLP5050FDER1R8M51

Vishay / Dale

FIXED IND 1.8UH 26A 2.94 MOHM

0
IHLP6767GZER470M11

IHLP6767GZER470M11

Vishay / Dale

FIXED IND 47UH 8.7A 42.7 MOHM

6741
IHLP2525BDER8R2M01

IHLP2525BDER8R2M01

Vishay / Dale

FIXED IND 8.2UH 3A 106 MOHM SMD

0
ISC1210BN220K

ISC1210BN220K

Vishay / Dale

FIXED IND 22UH 150MA 3.1 OHM SMD

0
ISC1812EB2R7K

ISC1812EB2R7K

Vishay / Dale

FIXED IND 2.7UH 378MA 490 MOHM

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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