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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
ISC1812ES8R2J

ISC1812ES8R2J

Vishay / Dale

FIXED IND 8.2UH 292MA 820 MOHM

0
IHLP3232DZER220M11

IHLP3232DZER220M11

Vishay / Dale

FIXED IND 22UH 4.3A 94.2 MOHM

4813
IMC1812RQ82NM

IMC1812RQ82NM

Vishay / Dale

FIXED IND 82NH 450MA 400 MOHM

0
ISC1812ES220J

ISC1812ES220J

Vishay / Dale

FIXED IND 22UH 227MA 1.36 OHM

0
IHLP2525CZERR68M06

IHLP2525CZERR68M06

Vishay / Dale

FIXED IND 680NH 15.5A 5.2 MOHM

0
IHSM5832ER271L

IHSM5832ER271L

Vishay / Dale

FIXED IND 270UH 640MA 1.27 OHM

0
IMC1812EB18NM

IMC1812EB18NM

Vishay / Dale

FIXED IND 18NH 450MA 200 MOHM

0
IMC1210EB3R3K

IMC1210EB3R3K

Vishay / Dale

FIXED IND 3.3UH 260MA 1.2 OHM

0
IMC1210BNR56K

IMC1210BNR56K

Vishay / Dale

FIXED IND 560NH 450MA 550 MOHM

0
IHSM5832ER1R58L

IHSM5832ER1R58L

Vishay / Dale

FIXED IND 1.8UH 8.6A 13 MOHM SMD

0
ISC1812BN391K

ISC1812BN391K

Vishay / Dale

FIXED IND 390UH 92MA 8.2 OHM SMD

0
ISC1210AN220K

ISC1210AN220K

Vishay / Dale

FIXED IND 22UH 150MA 3.1 OHM SMD

0
ISC1210EB101K

ISC1210EB101K

Vishay / Dale

FIXED IND 100UH 80MA 12 OHM SMD

0
ISC1210SY27NM

ISC1210SY27NM

Vishay / Dale

FIXED IND 27NH 610MA 170 MOHM

0
IHSM7832ER122L

IHSM7832ER122L

Vishay / Dale

FIXED IND 1.2MH 460MA 2.68 OHM

0
ISC1210ERR33M

ISC1210ERR33M

Vishay / Dale

FIXED IND 330NH 475MA 360 MOHM

0
IMC1210ER2R7J

IMC1210ER2R7J

Vishay / Dale

FIXED IND 2.7UH 290MA 1.1 OHM

0
IMC1210ER47NJ

IMC1210ER47NJ

Vishay / Dale

FIXED IND 47NH 483MA 300 MOHM

0
IHLM2525CZER2R2M01

IHLM2525CZER2R2M01

Vishay / Dale

FIXED IND 2.2UH 8A 20 MOHM SMD

3380
IMC1812RV560J

IMC1812RV560J

Vishay / Dale

FIXED IND 56UH 135MA 5.5 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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