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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IMC1812BNR33K

IMC1812BNR33K

Vishay / Dale

FIXED IND 330NH 430MA 550 MOHM

0
IMC1210BNR39J

IMC1210BNR39J

Vishay / Dale

FIXED IND 390NH 450MA 450 MOHM

0
IMC1210BN22NK

IMC1210BN22NK

Vishay / Dale

FIXED IND 22NH 592MA 200 MOHM

0
ISC1812RV221K

ISC1812RV221K

Vishay / Dale

FIXED IND 220UH 105MA 6.3 OHM

0
IHD3EB152L

IHD3EB152L

Vishay / Dale

FIXED IND 1.5MH 600MA 1.18 OHM

190
IMC0603ER30NJ01

IMC0603ER30NJ01

Vishay / Dale

FIXED IND 30NH 600MA 220 MOHM

0
ISC1210ER270J

ISC1210ER270J

Vishay / Dale

FIXED IND 27UH 125MA 3.3 OHM SMD

0
IMC1812RQR39K

IMC1812RQR39K

Vishay / Dale

FIXED IND 390NH 380MA 700 MOHM

0
ISC1210SY5R6K

ISC1210SY5R6K

Vishay / Dale

FIXED IND 5.6UH 210MA 1.4 OHM

0
IHD3EB472L

IHD3EB472L

Vishay / Dale

FIXED IND 4.7MH 400MA 3.79 OHM

37
ISC1812BNR10M

ISC1812BNR10M

Vishay / Dale

FIXED IND 100NH 552MA 230 MOHM

0
ISC1210BNR82M

ISC1210BNR82M

Vishay / Dale

FIXED IND 820NH 450MA 500 MOHM

0
ILSB0603ER1R0K

ILSB0603ER1R0K

Vishay / Dale

FIXED IND 1UH 25MA 600 MOHM SMD

7319
IMC1812RQR56K

IMC1812RQR56K

Vishay / Dale

FIXED IND 560NH 285MA 1.2 OHM

0
IMC1812RV15NM

IMC1812RV15NM

Vishay / Dale

FIXED IND 15NH 450MA 200 MOHM

0
IMC1812EB150J

IMC1812EB150J

Vishay / Dale

FIXED IND 15UH 200MA 2.5 OHM SMD

0
ISC1812RV181K

ISC1812RV181K

Vishay / Dale

FIXED IND 180UH 111MA 5.72 OHM

0
IMC1210EBR15K

IMC1210EBR15K

Vishay / Dale

FIXED IND 150NH 548MA 250 MOHM

0
IHLP2020CZET2R2M01

IHLP2020CZET2R2M01

Vishay / Dale

FIXED IND 2.2UH 5.8A 29.2MOHM SM

1657
IHLP1616BZET2R2M01

IHLP1616BZET2R2M01

Vishay / Dale

FIXED IND 2.2UH 2.85A 90MOHM SMD

2819

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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