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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IMC0805ERR33J01

IMC0805ERR33J01

Vishay / Dale

FIXED IND 330NH 300MA 1.65 OHM

0
IHLP1212BZER2R2M11

IHLP1212BZER2R2M11

Vishay / Dale

FIXED IND 2.2UH 3A 46 MOHM SMD

52572
IHLP1616BZERR10M01

IHLP1616BZERR10M01

Vishay / Dale

FIXED IND 100NH 11A 5 MOHM SMD

0
IMC1812EB271J

IMC1812EB271J

Vishay / Dale

FIXED IND 270UH 92MA 12 OHM SMD

0
ISC1812RQ1R8K

ISC1812RQ1R8K

Vishay / Dale

FIXED IND 1.8UH 403MA 430 MOHM

0
ISC1210ERR18J

ISC1210ERR18J

Vishay / Dale

FIXED IND 180NH 580MA 240 MOHM

0
ISC1812ESR33M

ISC1812ESR33M

Vishay / Dale

FIXED IND 330NH 418MA 400 MOHM

0
IHLP1212ABERR22M11

IHLP1212ABERR22M11

Vishay / Dale

FIXED IND 220NH 9.3A 11.4 MOHM

0
ISC1210BN39NJ

ISC1210BN39NJ

Vishay / Dale

FIXED IND 39NH 530MA 240 MOHM

0
IHLP2020ABER2R2M01

IHLP2020ABER2R2M01

Vishay / Dale

FIXED IND 2.2UH 3.4A 77.3 MOHM

0
ISC1812EB270J

ISC1812EB270J

Vishay / Dale

FIXED IND 27UH 212MA 1.56 OHM

0
IMC1812RQ3R3J

IMC1812RQ3R3J

Vishay / Dale

FIXED IND 3.3UH 355MA 800 MOHM

0
ISC1210SY1R2K

ISC1210SY1R2K

Vishay / Dale

FIXED IND 1.2UH 390MA 650 MOHM

0
IMC1210BNR18K

IMC1210BNR18K

Vishay / Dale

FIXED IND 180NH 518MA 280 MOHM

0
IMC1812RQ2R2K

IMC1812RQ2R2K

Vishay / Dale

FIXED IND 2.2UH 380MA 700 MOHM

0
IHD1ER270L

IHD1ER270L

Vishay / Dale

FIXED IND 27UH 1.9A 70 MOHM TH

0
ISC1812BN101K

ISC1812BN101K

Vishay / Dale

FIXED IND 100UH 147MA 3.25 OHM

0
IMC1210EB39NJ

IMC1210EB39NJ

Vishay / Dale

FIXED IND 39NH 530MA 270 MOHM

0
IMC1812EBR82J

IMC1812EBR82J

Vishay / Dale

FIXED IND 820NH 250MA 1.6 OHM

0
IHD3ER100L

IHD3ER100L

Vishay / Dale

FIXED IND 10UH 4A 16 MOHM TH

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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