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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IHLP4040DZER6R8M5A

IHLP4040DZER6R8M5A

Vishay / Dale

FIXED IND 6.8UH 8A 22.36 MOHM

0
IMC1812RQ1R8K

IMC1812RQ1R8K

Vishay / Dale

FIXED IND 1.8UH 390MA 650 MOHM

0
IHLP2020CZER1R5M11

IHLP2020CZER1R5M11

Vishay / Dale

FIXED IND 1.5UH 7.5A 18.5 MOHM

5675
ILSB0603ERR33K

ILSB0603ERR33K

Vishay / Dale

FIXED IND 330NH 35MA 850 MOHM

0
IMC1210EBR27M

IMC1210EBR27M

Vishay / Dale

FIXED IND 270NH 456MA 360 MOHM

0
IHLP5050EZERR33M5A

IHLP5050EZERR33M5A

Vishay / Dale

FIXED IND 330NH 62.38A 1.02 MOHM

231
IHLP2525CZET1R5M01

IHLP2525CZET1R5M01

Vishay / Dale

FIXED IND 1.5UH 9A 15MOHM SMD

902
IHLP2020CZET100M11

IHLP2020CZET100M11

Vishay / Dale

FIXED IND 10UH 2.75A 131.9MOHM

1603
IHSM5832ER332L

IHSM5832ER332L

Vishay / Dale

FIXED IND 3.3MH 180MA 15.6 OHM

0
ILSB0805ER1R8K

ILSB0805ER1R8K

Vishay / Dale

FIXED IND 1.8UH 50MA 600 MOHM

0
IMC1812EB101J

IMC1812EB101J

Vishay / Dale

FIXED IND 100UH 110MA 8 OHM SMD

0
IMC1210BN680J

IMC1210BN680J

Vishay / Dale

FIXED IND 68UH 83MA 11 OHM SMD

0
IHLP4040DZET1R5M01

IHLP4040DZET1R5M01

Vishay / Dale

FIXED IND 1.5UH 15A 5.8MOHM SMD

299
IMC1812ET1R0K

IMC1812ET1R0K

Vishay / Dale

FIXED IND 1UH 450MA 500 MOHM SMD

0
IMC1812EB121J

IMC1812EB121J

Vishay / Dale

FIXED IND 120UH 110MA 8 OHM SMD

0
ISC1812BN820K

ISC1812BN820K

Vishay / Dale

FIXED IND 82UH 156MA 2.86 OHM

0
IFSC1111ABER100M01

IFSC1111ABER100M01

Vishay / Dale

FIXED IND 10UH 1A 336 MOHM SMD

3289
ISC1812BNR68K

ISC1812BNR68K

Vishay / Dale

FIXED IND 680NH 296MA 800 MOHM

0
IMC1210SY10NK

IMC1210SY10NK

Vishay / Dale

FIXED IND 10NH 734MA 130 MOHM

0
ISC1812RV3R9J

ISC1812RV3R9J

Vishay / Dale

FIXED IND 3.9UH 344MA 590 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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