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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IHLP2020CZER6R8M5A

IHLP2020CZER6R8M5A

Vishay / Dale

FIXED IND 6.8 UH 3.2 A 111 MOHM

0
IMC1210SY470J

IMC1210SY470J

Vishay / Dale

FIXED IND 47UH 91MA 9 OHM SMD

0
IHLP1212ABERR68M11

IHLP1212ABERR68M11

Vishay / Dale

FIXED IND 680NH 4A 25 MOHM SMD

0
IMC1210EBR10M

IMC1210EBR10M

Vishay / Dale

FIXED IND 100NH 450MA 440 MOHM

0
ISC1210EBR68J

ISC1210EBR68J

Vishay / Dale

FIXED IND 680NH 450MA 480 MOHM

0
ISC1812ER4R7K

ISC1812ER4R7K

Vishay / Dale

FIXED IND 4.7UH 336MA 620 MOHM

0
ILC0603ER5N6S

ILC0603ER5N6S

Vishay / Dale

FIXED IND 5.6NH 300MA 180 MOHM

0
IMC1210BN220K

IMC1210BN220K

Vishay / Dale

FIXED IND 22UH 145MA 3.7 OHM SMD

0
ISC1210BNR47M

ISC1210BNR47M

Vishay / Dale

FIXED IND 470NH 460MA 440 MOHM

0
IHA305BA

IHA305BA

Vishay / Dale

FIXED IND 100UH 4.2A 70 MOHM TH

155
ISC1210BN56NM

ISC1210BN56NM

Vishay / Dale

FIXED IND 56NH 485MA 280 MOHM

0
IHD1ER3R3L

IHD1ER3R3L

Vishay / Dale

FIXED IND 3.3UH 4A 16 MOHM TH

0
IMC1210ER3R3M

IMC1210ER3R3M

Vishay / Dale

FIXED IND 3.3UH 260MA 1.2 OHM

0
IHD3EB473L

IHD3EB473L

Vishay / Dale

FIXED IND 47MH 100MA 33.7 OHM TH

0
IMC0805ERR39J01

IMC0805ERR39J01

Vishay / Dale

FIXED IND 390NH 210MA 2.2 OHM

0
IMC1812BNR27J

IMC1812BNR27J

Vishay / Dale

FIXED IND 270NH 450MA 450 MOHM

0
IHD3EB270L

IHD3EB270L

Vishay / Dale

FIXED IND 27UH 4A 25 MOHM TH

0
IHLP5050FDER1R0M01

IHLP5050FDER1R0M01

Vishay / Dale

FIXED IND 1UH 32A 2 MOHM SMD

3243
ISC1812ESR18M

ISC1812ESR18M

Vishay / Dale

FIXED IND 180NH 468MA 320 MOHM

0
IMC1210EB56NK

IMC1210EB56NK

Vishay / Dale

FIXED IND 56NH 470MA 330 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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