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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IHLP3232DZER6R8M11

IHLP3232DZER6R8M11

Vishay / Dale

FIXED IND 6.8UH 7A 33.4 MOHM SMD

8982
IHSM7832ER102L

IHSM7832ER102L

Vishay / Dale

FIXED IND 1MH 510MA 2.42 OHM SMD

0
IMC0603ERR27J01

IMC0603ERR27J01

Vishay / Dale

FIXED IND 270NH 170MA 1.8 OHM

0
IHLP6767GZER3R3M11

IHLP6767GZER3R3M11

Vishay / Dale

FIXED IND 3.3UH 35A 2.93 MOHM

14187
IFLR4031GCERR17M01

IFLR4031GCERR17M01

Vishay / Dale

FIXED IND 170NH 61A 0.29 MOHM

150
IFSC0806AZER6R8M01

IFSC0806AZER6R8M01

Vishay / Dale

FIXED IND 6.8UH 600MA 748 MOHM

0
IHLP4040DZER3R3M5A

IHLP4040DZER3R3M5A

Vishay / Dale

FIXED IND 3.3UH 11A 11.81 MOHM

0
ISC1210EBR33J

ISC1210EBR33J

Vishay / Dale

FIXED IND 330NH 475MA 360 MOHM

0
IMC1812RV181K

IMC1812RV181K

Vishay / Dale

FIXED IND 180UH 102MA 9.5 OHM

0
ISC1210SY3R9J

ISC1210SY3R9J

Vishay / Dale

FIXED IND 3.9UH 250MA 1.2 OHM

0
IMC1210BNR39M

IMC1210BNR39M

Vishay / Dale

FIXED IND 390NH 450MA 450 MOHM

0
ISC1210SY3R3K

ISC1210SY3R3K

Vishay / Dale

FIXED IND 3.3UH 270MA 1.1 OHM

0
IHLP6767DZER3R3M11

IHLP6767DZER3R3M11

Vishay / Dale

FIXED IND 3.3UH 20.5A 7.3 MOHM

5451
ISC1210SY120J

ISC1210SY120J

Vishay / Dale

FIXED IND 12UH 175MA 2.3 OHM SMD

0
ISC1210EBR82J

ISC1210EBR82J

Vishay / Dale

FIXED IND 820NH 450MA 500 MOHM

0
ISC1210ER68NM

ISC1210ER68NM

Vishay / Dale

FIXED IND 68NH 475MA 350 MOHM

0
IFSC1008ABER3R3M01

IFSC1008ABER3R3M01

Vishay / Dale

FIXED IND 3.3UH 1.45A 155 MOHM

0
IMC1812RQ821K

IMC1812RQ821K

Vishay / Dale

FIXED IND 820UH 30MA 35 OHM SMD

0
IHLP3232DZERR22M01

IHLP3232DZERR22M01

Vishay / Dale

FIXED IND 220NH 30.7A 1.68 MOHM

8703
IHLP4040DZER2R0M11

IHLP4040DZER2R0M11

Vishay / Dale

FIXED IND 2UH 16A 5.8 MOHM SMD

2045

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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