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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IMC1812EB180J

IMC1812EB180J

Vishay / Dale

FIXED IND 18UH 190MA 2.8 OHM SMD

0
IHLP5050FDER7R8M51

IHLP5050FDER7R8M51

Vishay / Dale

FIXED IND 8.5UH 13.5A 13.48 MOHM

0
IHSM4825ER3R3L

IHSM4825ER3R3L

Vishay / Dale

FIXED IND 3.3UH 4.6A 38 MOHM SMD

0
IHLP6767GZER220M11

IHLP6767GZER220M11

Vishay / Dale

FIXED IND 22UH 12A 21 MOHM SMD

0
IMC1210EBR18K

IMC1210EBR18K

Vishay / Dale

FIXED IND 180NH 518MA 280 MOHM

0
IMC1812ER220J

IMC1812ER220J

Vishay / Dale

FIXED IND 22UH 180MA 3.2 OHM SMD

0
ISC1210SY470K

ISC1210SY470K

Vishay / Dale

FIXED IND 47UH 100MA 8 OHM SMD

0
IMC1210SY5R6J

IMC1210SY5R6J

Vishay / Dale

FIXED IND 5.6UH 217MA 1.6 OHM

0
IMC1210BNR27M

IMC1210BNR27M

Vishay / Dale

FIXED IND 270NH 456MA 360 MOHM

0
IFLR5151HZERR26M01

IFLR5151HZERR26M01

Vishay / Dale

FIXED IND 260NH 50A 0.35 MOHM

4992
IHLM2525CZER1R0M01

IHLM2525CZER1R0M01

Vishay / Dale

FIXED IND 1UH 11A 10 MOHM SMD

17
IHLP4040DZERR22M11

IHLP4040DZERR22M11

Vishay / Dale

FIXED IND 220NH 33A 0.95 MOHM

0
IMC1812RQ561J

IMC1812RQ561J

Vishay / Dale

FIXED IND 560UH 50MA 30 OHM SMD

0
IMC1210SY18NM

IMC1210SY18NM

Vishay / Dale

FIXED IND 18NH 624MA 180 MOHM

0
IMC1812ES1R5J

IMC1812ES1R5J

Vishay / Dale

FIXED IND 1.5UH 410MA 600 MOHM

0
IHD1EB391L

IHD1EB391L

Vishay / Dale

FIXED IND 390UH 570MA 770 MOHM

0
IMC1812RV1R0K

IMC1812RV1R0K

Vishay / Dale

FIXED IND 1UH 450MA 500 MOHM SMD

0
IMC1812RV471J

IMC1812RV471J

Vishay / Dale

FIXED IND 470UH 62MA 26 OHM SMD

0
IHLP6767GZERR47M5A

IHLP6767GZERR47M5A

Vishay / Dale

FIXED IND 470NH 65A 0.95 MOHM

238
IMC1812ER3R9J

IMC1812ER3R9J

Vishay / Dale

FIXED IND 3.9UH 330MA 900 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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