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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IHLP3232DZER2R2M11

IHLP3232DZER2R2M11

Vishay / Dale

FIXED IND 2.2UH 14.5A 9.41 MOHM

8318
IMC1210BN33NK

IMC1210BN33NK

Vishay / Dale

FIXED IND 33NH 540MA 240 MOHM

0
ISC1812ESR15K

ISC1812ESR15K

Vishay / Dale

FIXED IND 150NH 491MA 290 MOHM

0
IMC1210ER390K

IMC1210ER390K

Vishay / Dale

FIXED IND 39UH 104MA 7 OHM SMD

0
IHLP4040DZER3R3M8A

IHLP4040DZER3R3M8A

Vishay / Dale

FIXED IND 3.3UH 11A 11.81 MOHM

757
IMC0603ER8N2K01

IMC0603ER8N2K01

Vishay / Dale

FIXED IND 8.2NH 700MA 100 MOHM

0
IMC1812ES102K

IMC1812ES102K

Vishay / Dale

FIXED IND 1MH 30MA 40 OHM SMD

0
IMC1812ER560K

IMC1812ER560K

Vishay / Dale

FIXED IND 56UH 135MA 5.5 OHM SMD

0
IMC1210ERR82K

IMC1210ERR82K

Vishay / Dale

FIXED IND 820NH 450MA 670 MOHM

0
ISC1210SY100K

ISC1210SY100K

Vishay / Dale

FIXED IND 10UH 185MA 2 OHM SMD

0
IHXL1500VZEB1R5M5A

IHXL1500VZEB1R5M5A

Vishay / Dale

FIXED IND 1.5UH 178A 0.26 MOHM

0
ISC1812ES181K

ISC1812ES181K

Vishay / Dale

FIXED IND 180UH 111MA 5.72 OHM

0
ISC1812BN270J

ISC1812BN270J

Vishay / Dale

FIXED IND 27UH 212MA 1.56 OHM

0
IHLP2020BZET2R2M01

IHLP2020BZET2R2M01

Vishay / Dale

FIXED IND 2.2UH 4.2A 50.1MOHM SM

2950
IMC1210SY150K

IMC1210SY150K

Vishay / Dale

FIXED IND 15UH 164MA 2.8 OHM SMD

0
IMC1210ER100J

IMC1210ER100J

Vishay / Dale

FIXED IND 10UH 189MA 2.1 OHM SMD

0
ISC1210SY680K

ISC1210SY680K

Vishay / Dale

FIXED IND 68UH 90MA 10 OHM SMD

0
ISC1812ERR47M

ISC1812ERR47M

Vishay / Dale

FIXED IND 470NH 342MA 600 MOHM

0
IHXL1500VZEB2R2M5A

IHXL1500VZEB2R2M5A

Vishay / Dale

FIXED IND 2.2UH 168A 0.34 MOHM

0
IMC1812ES390J

IMC1812ES390J

Vishay / Dale

FIXED IND 39UH 150MA 4.5 OHM SMD

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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