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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IMC1812ESR22J

IMC1812ESR22J

Vishay / Dale

FIXED IND 220NH 450MA 400 MOHM

0
IHLP2525BDERR10M01

IHLP2525BDERR10M01

Vishay / Dale

FIXED IND 100NH 30A 1.7 MOHM SMD

0
ISC1210ER4R7J

ISC1210ER4R7J

Vishay / Dale

FIXED IND 4.7UH 220MA 1.25 OHM

0
IHLP3232CZER5R6M01

IHLP3232CZER5R6M01

Vishay / Dale

FIXED IND 5.6UH 6.3A 37.2 MOHM

0
IMC1812EB5R6K

IMC1812EB5R6K

Vishay / Dale

FIXED IND 5.6UH 300MA 1.1 OHM

0
IHLM2525CZER100M07

IHLM2525CZER100M07

Vishay / Dale

FIXED IND 10UH 3A 97.71 MOHM SMD

0
IMC1812EB681J

IMC1812EB681J

Vishay / Dale

FIXED IND 680UH 50MA 30 OHM SMD

0
IFSC1111AZER220M01

IFSC1111AZER220M01

Vishay / Dale

FIXED IND 22UH 500MA 750 MOHM

2279
ISC1812RQ150J

ISC1812RQ150J

Vishay / Dale

FIXED IND 15UH 252MA 1.1 OHM SMD

0
ILSB0805ERR82K

ILSB0805ERR82K

Vishay / Dale

FIXED IND 820NH 150MA 1 OHM SMD

0
IMC1812ER15NM

IMC1812ER15NM

Vishay / Dale

FIXED IND 15NH 450MA 200 MOHM

0
IHLP6767GZER4R7M11

IHLP6767GZER4R7M11

Vishay / Dale

FIXED IND 4.7UH 30A 4.18 MOHM

128
IHLP6767GZERR56M01

IHLP6767GZERR56M01

Vishay / Dale

FIXED IND 560NH 56A 1.05 MOHM

57
IMC1210ER150K

IMC1210ER150K

Vishay / Dale

FIXED IND 15UH 164MA 2.8 OHM SMD

0
IHLP5050CEERR82M01

IHLP5050CEERR82M01

Vishay / Dale

FIXED IND 820NH 25A 3 MOHM SMD

13
IMC1812RQ68NK

IMC1812RQ68NK

Vishay / Dale

FIXED IND 68NH 450MA 350 MOHM

0
ISC1812RQ151J

ISC1812RQ151J

Vishay / Dale

FIXED IND 150UH 130MA 4.16 OHM

0
IHLP2020CZER1R5M8A

IHLP2020CZER1R5M8A

Vishay / Dale

FIXED IND 1.5 UH 7.9 A 19.8 MOHM

0
IMC1210SY22NK

IMC1210SY22NK

Vishay / Dale

FIXED IND 22NH 592MA 200 MOHM

0
ISC1210ER1R8J

ISC1210ER1R8J

Vishay / Dale

FIXED IND 1.8UH 350MA 850 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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