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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IMC0603ER82NJ01

IMC0603ER82NJ01

Vishay / Dale

FIXED IND 82NH 400MA 540 MOHM

0
IHLP3232DZER5R6M5A

IHLP3232DZER5R6M5A

Vishay / Dale

FIXED IND 5.6UH 6.9A 31.67 MOHM

0
IHLP6767GZER3R3M5A

IHLP6767GZER3R3M5A

Vishay / Dale

FIXED IND 3.3UH 32.2A 3.27 MOHM

1762
ISC1812BN560K

ISC1812BN560K

Vishay / Dale

FIXED IND 56UH 173MA 2.34 OHM

0
IHD3ER390L

IHD3ER390L

Vishay / Dale

FIXED IND 39UH 4A 31 MOHM TH

0
IHLP2020CZER1R0M5A

IHLP2020CZER1R0M5A

Vishay / Dale

FIXED IND 1 UH 10.8 A 12.1 MOHM

0
IMC1210SYR39M

IMC1210SYR39M

Vishay / Dale

FIXED IND 390NH 450MA 450 MOHM

0
ISC1210SY560J

ISC1210SY560J

Vishay / Dale

FIXED IND 56UH 95MA 10 OHM SMD

0
ISC1812ER101K

ISC1812ER101K

Vishay / Dale

FIXED IND 100UH 147MA 3.25 OHM

4002
IMC1210SY390K

IMC1210SY390K

Vishay / Dale

FIXED IND 39UH 104MA 7 OHM SMD

0
IHLP1212AEER1R5M11

IHLP1212AEER1R5M11

Vishay / Dale

FIXED IND 1.5UH 2.7A 46 MOHM SMD

0
IMC1210ERR47M

IMC1210ERR47M

Vishay / Dale

FIXED IND 470NH 450MA 500 MOHM

0
ISC1210EB1R8K

ISC1210EB1R8K

Vishay / Dale

FIXED IND 1.8UH 350MA 850 MOHM

0
IHLP3232CZER2R2M01

IHLP3232CZER2R2M01

Vishay / Dale

FIXED IND 2.2UH 9A 20.3 MOHM SMD

0
IMC1812BN27NM

IMC1812BN27NM

Vishay / Dale

FIXED IND 27NH 450MA 200 MOHM

0
IHD1EB270L

IHD1EB270L

Vishay / Dale

FIXED IND 27UH 1.9A 70 MOHM TH

100
IMC1210BN390J

IMC1210BN390J

Vishay / Dale

FIXED IND 39UH 104MA 7 OHM SMD

0
ISC1812RQ221K

ISC1812RQ221K

Vishay / Dale

FIXED IND 220UH 105MA 6.3 OHM

0
ISC1812EB3R3K

ISC1812EB3R3K

Vishay / Dale

FIXED IND 3.3UH 357MA 550 MOHM

0
IMC1812EB102J

IMC1812EB102J

Vishay / Dale

FIXED IND 1MH 30MA 40 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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