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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IHLM2525CZER1R0M06

IHLM2525CZER1R0M06

Vishay / Dale

FIXED IND 1UH 11A 8.84 MOHM SMD

0
IMC1812RV27NM

IMC1812RV27NM

Vishay / Dale

FIXED IND 27NH 450MA 200 MOHM

0
IMC1812ERR10K

IMC1812ERR10K

Vishay / Dale

FIXED IND 100NH 450MA 320 MOHM

0
IHXL2000VZEB2R2M5A

IHXL2000VZEB2R2M5A

Vishay / Dale

FIXED IND 2.2UH 187A 0.23 MOHM

105
IMC0603ERR12G01

IMC0603ERR12G01

Vishay / Dale

FIXED IND 120NH 300MA 650 MOHM

0
ISC1812RV1R8J

ISC1812RV1R8J

Vishay / Dale

FIXED IND 1.8UH 403MA 430 MOHM

0
IMC1210SY27NJ

IMC1210SY27NJ

Vishay / Dale

FIXED IND 27NH 564MA 220 MOHM

0
IMC1812ERR33M

IMC1812ERR33M

Vishay / Dale

FIXED IND 330NH 430MA 550 MOHM

0
ISC1812ESR12K

ISC1812ESR12K

Vishay / Dale

FIXED IND 120NH 519MA 260 MOHM

0
IHSM5832ER561L

IHSM5832ER561L

Vishay / Dale

FIXED IND 560UH 460MA 2.42 OHM

0
IHSM3825ER1R2L

IHSM3825ER1R2L

Vishay / Dale

FIXED IND 1.2UH 4.93A 16 MOHM

0
IHLP2525CZER8R2M06

IHLP2525CZER8R2M06

Vishay / Dale

FIXED IND 8.2UH 4A 61.47 MOHM

0
ISC1812BNR22K

ISC1812BNR22K

Vishay / Dale

FIXED IND 220NH 441MA 360 MOHM

0
IMC1812ER1R2J

IMC1812ER1R2J

Vishay / Dale

FIXED IND 1.2UH 430MA 550 MOHM

0
ISC1812ER180J

ISC1812ER180J

Vishay / Dale

FIXED IND 18UH 238MA 1.24 OHM

0
ISC1812RQ561K

ISC1812RQ561K

Vishay / Dale

FIXED IND 560UH 82MA 10.5 OHM

0
IHLP4040DZER6R8M01

IHLP4040DZER6R8M01

Vishay / Dale

FIXED IND 6.8UH 8A 23.3 MOHM SMD

9917
IMC1210ER330K

IMC1210ER330K

Vishay / Dale

FIXED IND 33UH 112MA 6 OHM SMD

0
IHLP5050CEERR68M07

IHLP5050CEERR68M07

Vishay / Dale

FIXED IND 680NH 28A 2.34 MOHM

0
IHLP3232DZER150M11

IHLP3232DZER150M11

Vishay / Dale

FIXED IND 15UH 4.9A 65.3 MOHM

5492

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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