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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MAMK2520T4R7M

MAMK2520T4R7M

TAIYO YUDEN

FIXED IND 4.7UH 1.3A 260 MOHM

114661
NRH3010T220MN

NRH3010T220MN

TAIYO YUDEN

FIXED IND 22UH 410MA 924 MOHM

1500
HKQ0603U0N8B-T

HKQ0603U0N8B-T

TAIYO YUDEN

FIXED IND 0.8NH 900MA 60 MOHM

2443
CB2016T100K

CB2016T100K

TAIYO YUDEN

FIXED IND 10UH 520MA 650 MOHM

1457
HK100547NK-T

HK100547NK-T

TAIYO YUDEN

FIXED IND 47NH 230MA 1 OHM SMD

0
NRS3015T3R3MNGHV

NRS3015T3R3MNGHV

TAIYO YUDEN

FIXED IND 3.3UH 1.23A 93.6 MOHM

4274
NS12555T151MN

NS12555T151MN

TAIYO YUDEN

FIXED IND 150UH 1.43A 211.2 MOHM

0
CB2016T1R0M

CB2016T1R0M

TAIYO YUDEN

FIXED IND 1UH 1.1A 117 MOHM SMD

1990
LBM2016T120JV

LBM2016T120JV

TAIYO YUDEN

FIXED IND 12UH 200MA 1.82 OHM

0
LB2518T151KV

LB2518T151KV

TAIYO YUDEN

FIXED IND 150UH 45MA 4.16 OHM

0
LB2518T680KV

LB2518T680KV

TAIYO YUDEN

FIXED IND 68UH 70MA 1.95 OHM SMD

0
LBR2012T101K

LBR2012T101K

TAIYO YUDEN

FIXED IND 100UH 50MA 4 OHM SMD

688
LK10051R0K-TV

LK10051R0K-TV

TAIYO YUDEN

FIXED IND 1UH 20MA 640 MOHM SMD

0
HKQ04022N0C-T

HKQ04022N0C-T

TAIYO YUDEN

FIXED IND 2NH 290MA 230 MOHM SMD

0
LHL08TB101K

LHL08TB101K

TAIYO YUDEN

FIXED IND 100UH 790MA 320 MOHM

0
NS10145T1R0NNV

NS10145T1R0NNV

TAIYO YUDEN

FIXED IND 1UH 8.9A 5.88 MOHM SMD

115
EST1040T100MDGA

EST1040T100MDGA

TAIYO YUDEN

FIXED IND 10UH 2A 35 MOHM SMD

1400
LBMF1608T100K

LBMF1608T100K

TAIYO YUDEN

FIXED IND 10UH 80MA 360 MOHM SMD

322324
LHL10TB221K

LHL10TB221K

TAIYO YUDEN

FIXED IND 220UH 750MA 440 MOHM

0
NS12565T150MNV

NS12565T150MNV

TAIYO YUDEN

FIXED IND 15UH 4.33A 28.5 MOHM

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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