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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
LK1608120M-T

LK1608120M-T

TAIYO YUDEN

FIXED IND 12UH 10MA 1.8 OHM SMD

0
HKQ0603U5N9C-T

HKQ0603U5N9C-T

TAIYO YUDEN

FIXED IND 5.9NH 325MA 470 MOHM

12840
NRS5014TR47NMGG

NRS5014TR47NMGG

TAIYO YUDEN

FIXED IND 470NH 3.3A 25 MOHM SMD

0
MDMK3030T4R7MMV

MDMK3030T4R7MMV

TAIYO YUDEN

FIXED IND 4.7UH 1.55A 263 MOHM

0
LBM2016T820J

LBM2016T820J

TAIYO YUDEN

FIXED IND 82UH 85MA 7.7 OHM SMD

260
HK10053N3K-T

HK10053N3K-T

TAIYO YUDEN

FIXED IND 3.3NH 550MA 160 MOHM

0
HKQ0603W3N5B-T

HKQ0603W3N5B-T

TAIYO YUDEN

FIXED IND 3.5NH 500MA 200 MOHM

14950
AQ10510NJ-T

AQ10510NJ-T

TAIYO YUDEN

FIXED IND 10NH 440MA 310 MOHM

9340
LK1608R56K-T

LK1608R56K-T

TAIYO YUDEN

FIXED IND 560NH 80MA 1.05 OHM

18995
NRS2012T3R3MGJV

NRS2012T3R3MGJV

TAIYO YUDEN

FIXED IND 3.3UH 1.02A 190 MOHM

354
NRS6012T150MMGJV

NRS6012T150MMGJV

TAIYO YUDEN

FIXED IND 15UH 800MA 354 MOHM

0
HK1005R12J-T

HK1005R12J-T

TAIYO YUDEN

FIXED IND 120NH 200MA 1.6 OHM

9464
BRC1608TR20M

BRC1608TR20M

TAIYO YUDEN

FIXED IND 200NH 980MA 60 MOHM

1900
CBC2518T681M

CBC2518T681M

TAIYO YUDEN

FIXED IND 680UH 60MA 36.4 OHM

0
BRL3225T150M

BRL3225T150M

TAIYO YUDEN

FIXED IND 15UH 530MA 570 MOHM

0
HKQ0603U2N2B-TV

HKQ0603U2N2B-TV

TAIYO YUDEN

FIXED IND 2.2NH 500MA 200 MOHM

12720
LHL10TB121K

LHL10TB121K

TAIYO YUDEN

FIXED IND 120UH 1A 250 MOHM TH

0
LK1005R18K-TV

LK1005R18K-TV

TAIYO YUDEN

FIXED IND 180NH 25MA 760 MOHM

10000
NRH3010T4R7MN

NRH3010T4R7MN

TAIYO YUDEN

FIXED IND 4.7UH 900MA 204 MOHM

2136
MBKK1608TR24N

MBKK1608TR24N

TAIYO YUDEN

FIXED IND 240NH 2.3A 49 MOHM SMD

3263

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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