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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
ILC0603ER1N0S

ILC0603ER1N0S

Vishay / Dale

FIXED IND 1NH 300MA 50 MOHM SMD

0
IMC1210EBR82K

IMC1210EBR82K

Vishay / Dale

FIXED IND 820NH 450MA 670 MOHM

0
ISC1812ER3R3K

ISC1812ER3R3K

Vishay / Dale

FIXED IND 3.3UH 357MA 550 MOHM

0
ILSB0805ER5R6K

ILSB0805ER5R6K

Vishay / Dale

FIXED IND 5.6UH 15MA 900 MOHM

0
ISC1210ERR47M

ISC1210ERR47M

Vishay / Dale

FIXED IND 470NH 460MA 440 MOHM

0
IHLP2525CZERR10M07

IHLP2525CZERR10M07

Vishay / Dale

FIXED IND 100NH 32.5A 1.3 MOHM

0
ISC1812EBR68K

ISC1812EBR68K

Vishay / Dale

FIXED IND 680NH 296MA 800 MOHM

0
IHLP5050EZER8R2M01

IHLP5050EZER8R2M01

Vishay / Dale

FIXED IND 8.2UH 9.5A 22.5 MOHM

0
IMC1812RQ27NM

IMC1812RQ27NM

Vishay / Dale

FIXED IND 27NH 450MA 200 MOHM

0
ISC1812RV101K

ISC1812RV101K

Vishay / Dale

FIXED IND 100UH 147MA 3.25 OHM

0
IHSM3825ER150L

IHSM3825ER150L

Vishay / Dale

FIXED IND 15UH 1.29A 228 MOHM

0
IMC1210SY470K

IMC1210SY470K

Vishay / Dale

FIXED IND 47UH 91MA 9 OHM SMD

0
ISC1210SYR82K

ISC1210SYR82K

Vishay / Dale

FIXED IND 820NH 450MA 500 MOHM

0
IHD3ER680L

IHD3ER680L

Vishay / Dale

FIXED IND 68UH 2.5A 59 MOHM TH

0
ISC1812RQ8R2J

ISC1812RQ8R2J

Vishay / Dale

FIXED IND 8.2UH 292MA 820 MOHM

0
IMC1210ER56NM

IMC1210ER56NM

Vishay / Dale

FIXED IND 56NH 470MA 330 MOHM

0
IHLP3232DZER1R0M01

IHLP3232DZER1R0M01

Vishay / Dale

FIXED IND 1UH 18A 5.78 MOHM SMD

42284
IMC1210SYR82K

IMC1210SYR82K

Vishay / Dale

FIXED IND 820NH 450MA 670 MOHM

0
IMC1210EB1R8J

IMC1210EB1R8J

Vishay / Dale

FIXED IND 1.8UH 350MA 900 MOHM

0
ISC1812RQR33M

ISC1812RQR33M

Vishay / Dale

FIXED IND 330NH 418MA 400 MOHM

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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