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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
HKQ0603U2N2B-T

HKQ0603U2N2B-T

TAIYO YUDEN

FIXED IND 2.2NH 500MA 200 MOHM

564
LHL08TB270K

LHL08TB270K

TAIYO YUDEN

FIXED IND 27UH 1.5A 91 MOHM TH

0
MAMK2520T2R2M

MAMK2520T2R2M

TAIYO YUDEN

FIXED IND 2.2UH 1.9A 117 MOHM

33
MDKK3030T6R8MMV

MDKK3030T6R8MMV

TAIYO YUDEN

FIXED IND 6.8UH 1A 437 MOHM SMD

0
LB3218T150M

LB3218T150M

TAIYO YUDEN

FIXED IND 15UH 300MA 320 MOHM

0
CBC2518T220K

CBC2518T220K

TAIYO YUDEN

FIXED IND 22UH 460MA 1.001 OHM

3591
BRC2518T330K

BRC2518T330K

TAIYO YUDEN

FIXED IND 33UH 390MA 1.105 OHM

1070
MDJE4040T6R8MM

MDJE4040T6R8MM

TAIYO YUDEN

FIXED IND 6.8UH 1.5A 370 MOHM

0
NRH2412T1R5NNGH

NRH2412T1R5NNGH

TAIYO YUDEN

FIXED IND 1.5UH 1.15A 100 MOHM

0
MDKK2020T1R5MM

MDKK2020T1R5MM

TAIYO YUDEN

FIXED IND 1.5UH 1.35A 133 MOHM

0
BRC2016T220M

BRC2016T220M

TAIYO YUDEN

FIXED IND 22UH 310MA 1 OHM SMD

5932
HK160856NJ-T

HK160856NJ-T

TAIYO YUDEN

FIXED IND 56NH 300MA 750 MOHM

20217
HK100510NJ-TV

HK100510NJ-TV

TAIYO YUDEN

FIXED IND 10NH 300MA 310 MOHM

77
BRHL2518T2R2M

BRHL2518T2R2M

TAIYO YUDEN

FIXED IND 2.2UH 1A 149.5 MOHM

3354
LB2016T220KV

LB2016T220KV

TAIYO YUDEN

FIXED IND 22UH 105MA 1 OHM SMD

1914
BRL2518T3R3M

BRL2518T3R3M

TAIYO YUDEN

FIXED IND 3.3UH 580MA 390 MOHM

0
BRL2012T1R5M

BRL2012T1R5M

TAIYO YUDEN

FIXED IND 1.5UH 750MA 234 MOHM

445
LB3218T220MV

LB3218T220MV

TAIYO YUDEN

FIXED IND 22UH 255MA 637MOHM SMD

0
NR6045T330M

NR6045T330M

TAIYO YUDEN

FIXED IND 33UH 1.4A 188.5 MOHM

10026
MDMK2020T2R2MMV

MDMK2020T2R2MMV

TAIYO YUDEN

FIXED IND 2.2UH 109 MOHM SMD

428

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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