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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IMC1210RM6R8K

IMC1210RM6R8K

Vishay / Dale

FIXED IND 6.8UH 204MA 1.8 OHM

0
ISC1812RV821K

ISC1812RV821K

Vishay / Dale

FIXED IND 820UH 72MA 13.5 OHM

0
IHLE5050FHER101M5A

IHLE5050FHER101M5A

Vishay / Dale

FIXED IND 100UH 3.1A 205 MOHM

39
IMC1210ANR33J

IMC1210ANR33J

Vishay / Dale

FIXED IND 330NH 453MA 400 MOHM

0
IHLP2020CZERR22M11

IHLP2020CZERR22M11

Vishay / Dale

FIXED IND 220NH 21A 3.9 MOHM SMD

1573
IHLP2525CZER8R2M11

IHLP2525CZER8R2M11

Vishay / Dale

FIXED IND 8.2UH 5A 54.9 MOHM SMD

0
IHLP4040DZER330M51

IHLP4040DZER330M51

Vishay / Dale

FIXED IND 33UH 3.7A 117.7 MOHM

470
ISC1812ES181J

ISC1812ES181J

Vishay / Dale

FIXED IND 180UH 111MA 5.72 OHM

0
IMC1210EB181K

IMC1210EB181K

Vishay / Dale

FIXED IND 180UH 60MA 17 OHM SMD

0
IMC1210ER2R7K

IMC1210ER2R7K

Vishay / Dale

FIXED IND 2.7UH 290MA 1.1 OHM

0
IHSM7832ER123L

IHSM7832ER123L

Vishay / Dale

FIXED IND 12MH 140MA 28.4 OHM

0
IHLP5050EZERR56M01

IHLP5050EZERR56M01

Vishay / Dale

FIXED IND 560NH 36A 1.5 MOHM SMD

0
ILC0603ER4N7S

ILC0603ER4N7S

Vishay / Dale

FIXED IND 4.7NH 300MA 160 MOHM

0
IMC0603ER56NG01

IMC0603ER56NG01

Vishay / Dale

FIXED IND 56NH 600MA 310 MOHM

0
IHLP6767GZER2R2M5A

IHLP6767GZER2R2M5A

Vishay / Dale

FIXED IND 2.2UH 38.5A 2.41 MOHM

1544
IMC1812RQ221J

IMC1812RQ221J

Vishay / Dale

FIXED IND 220UH 100MA 10 OHM SMD

0
IHSM4825ER470L

IHSM4825ER470L

Vishay / Dale

FIXED IND 47UH 1.07A 362 MOHM

2015
ISC1812RQ151K

ISC1812RQ151K

Vishay / Dale

FIXED IND 150UH 130MA 4.16 OHM

0
IMC1812EBR12M

IMC1812EBR12M

Vishay / Dale

FIXED IND 120NH 450MA 300 MOHM

0
IFSC1515AHER330M01

IFSC1515AHER330M01

Vishay / Dale

FIXED IND 33UH 900MA 486 MOHM

1629

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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