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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IHSM3825ER4R7L

IHSM3825ER4R7L

Vishay / Dale

FIXED IND 4.7UH 2.17A 83 MOHM

0
ISC1210EB10NM

ISC1210EB10NM

Vishay / Dale

FIXED IND 10NH 810MA 100 MOHM

0
IMC1210ERR68K

IMC1210ERR68K

Vishay / Dale

FIXED IND 680NH 450MA 600 MOHM

0
IHLP6767GZER6R8M11

IHLP6767GZER6R8M11

Vishay / Dale

FIXED IND 6.8UH 22.5A 6.15 MOHM

5139
IMC1812ER39NM

IMC1812ER39NM

Vishay / Dale

FIXED IND 39NH 450MA 300 MOHM

0
IMC1812RV3R9K

IMC1812RV3R9K

Vishay / Dale

FIXED IND 3.9UH 330MA 900 MOHM

0
ISC1210ER22NM

ISC1210ER22NM

Vishay / Dale

FIXED IND 22NH 640MA 150 MOHM

0
IMC1812BNR47K

IMC1812BNR47K

Vishay / Dale

FIXED IND 470NH 355MA 800 MOHM

0
IMC1812EBR22K

IMC1812EBR22K

Vishay / Dale

FIXED IND 220NH 450MA 400 MOHM

0
ISC1210EB3R9J

ISC1210EB3R9J

Vishay / Dale

FIXED IND 3.9UH 250MA 1.2 OHM

0
ISC1210SYR22M

ISC1210SYR22M

Vishay / Dale

FIXED IND 220NH 565MA 300 MOHM

0
IHLP2020CZER1R0M8A

IHLP2020CZER1R0M8A

Vishay / Dale

FIXED IND 1 UH 10.8 A 12.1 MOHM

0
IMC1812RQ100J

IMC1812RQ100J

Vishay / Dale

FIXED IND 10UH 250MA 1.6 OHM SMD

0
IMC1812RV2R2K

IMC1812RV2R2K

Vishay / Dale

FIXED IND 2.2UH 380MA 700 MOHM

0
IMC1210BNR82M

IMC1210BNR82M

Vishay / Dale

FIXED IND 820NH 450MA 670 MOHM

0
IHLP3232DZER100M11

IHLP3232DZER100M11

Vishay / Dale

FIXED IND 10UH 5.4A 51.8 MOHM

50318
IHD1ER100L

IHD1ER100L

Vishay / Dale

FIXED IND 10UH 2.8A 33 MOHM TH

0
IMC1210BN6R8K

IMC1210BN6R8K

Vishay / Dale

FIXED IND 6.8UH 204MA 1.8 OHM

0
IHLP4040DZER150M8A

IHLP4040DZER150M8A

Vishay / Dale

FIXED IND 15UH 5.1A 50.29 MOHM

3634
IHSM7832ER121L

IHSM7832ER121L

Vishay / Dale

FIXED IND 120UH 1.5A 305 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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