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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
NR4018T151M

NR4018T151M

TAIYO YUDEN

FIXED IND 150UH 220MA 3 OHM SMD

2890
MDKK2020T3R3MMV

MDKK2020T3R3MMV

TAIYO YUDEN

FIXED IND 3.3UH 940MA 275 MOHM

0
MBKK2012T1R0M

MBKK2012T1R0M

TAIYO YUDEN

FIXED IND 1UH 1.45A 106 MOHM SMD

11365
LB2012T3R3M

LB2012T3R3M

TAIYO YUDEN

FIXED IND 3.3UH 235MA 300 MOHM

1601
NR3015T4R7M

NR3015T4R7M

TAIYO YUDEN

FIXED IND 4.7UH 1.04A 144 MOHM

100199
HK160882NK-T

HK160882NK-T

TAIYO YUDEN

FIXED IND 82NH 300MA 950 MOHM

0
LB3218T471K

LB3218T471K

TAIYO YUDEN

FIXED IND 470UH 54MA 14 OHM SMD

0
LK1608220M-T

LK1608220M-T

TAIYO YUDEN

FIXED IND 22UH 1MA 1.7 OHM SMD

0
HK100515NJ-TV

HK100515NJ-TV

TAIYO YUDEN

FIXED IND 15NH 300MA 460 MOHM

29790
HK16082N7S-T

HK16082N7S-T

TAIYO YUDEN

FIXED IND 2.7NH 300MA 100 MOHM

14248
BRC2016T470M

BRC2016T470M

TAIYO YUDEN

FIXED IND 47UH 210MA 2.2 OHM SMD

0
NS12565T4R2NN

NS12565T4R2NN

TAIYO YUDEN

FIXED IND 4.2UH 5.91A 15.12 MOHM

82
NRS6020T0R8NMGGV

NRS6020T0R8NMGGV

TAIYO YUDEN

FIXED IND 800NH 4.1A 24 MOHM SMD

0
NRS6012T6R8MMGJV

NRS6012T6R8MMGJV

TAIYO YUDEN

FIXED IND 6.8UH 1.35A 198 MOHM

0
LBM2016TR18JV

LBM2016TR18JV

TAIYO YUDEN

FIXED IND 180NH 560MA 195 MOHM

0
EST1060T221MDGA

EST1060T221MDGA

TAIYO YUDEN

FIXED IND 220UH 950MA 384 MOHM

0
LB2016T101KV

LB2016T101KV

TAIYO YUDEN

FIXED IND 100UH 40MA 4.5 OHM SMD

0
AQ1059N1J-T

AQ1059N1J-T

TAIYO YUDEN

FIXED IND 9.1NH 450MA 290 MOHM

0
CB2518T680K

CB2518T680K

TAIYO YUDEN

FIXED IND 68UH 310MA 1.95 OHM

0
BRL2012T220M

BRL2012T220M

TAIYO YUDEN

FIXED IND 22UH 270MA 1.69 OHM

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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