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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MAKK2520T1R5M

MAKK2520T1R5M

TAIYO YUDEN

FIXED IND 1.5UH 1.8A 125 MOHM

0
LK1608R39K-T

LK1608R39K-T

TAIYO YUDEN

FIXED IND 390NH 80MA 850 MOHM

4000
NR5040T150M

NR5040T150M

TAIYO YUDEN

FIXED IND 15UH 1.8A 104 MOHM SMD

19
NRS5014T2R2NMGG

NRS5014T2R2NMGG

TAIYO YUDEN

FIXED IND 2.2UH 2A 78 MOHM SMD

440
NR3012T330M

NR3012T330M

TAIYO YUDEN

FIXED IND 33UH 330MA 1.236 OHM

0
LK10051R2M-T

LK10051R2M-T

TAIYO YUDEN

FIXED IND 1.2UH 20MA 790 MOHM

0
HK10052N7S-T

HK10052N7S-T

TAIYO YUDEN

FIXED IND 2.7NH 650MA 130 MOHM

86696
CB2012T100K

CB2012T100K

TAIYO YUDEN

FIXED IND 10UH 440MA 910 MOHM

3729
BRL2012T470M

BRL2012T470M

TAIYO YUDEN

FIXED IND 47UH 160MA 4.55 OHM

0
CBC2518T150KV

CBC2518T150KV

TAIYO YUDEN

FIXED IND 15UH 285MA 845 MOHM

0
NRS6012T680MMGJ

NRS6012T680MMGJ

TAIYO YUDEN

FIXED IND 68UH 410MA 1.392 OHM

0
LB2518T151K

LB2518T151K

TAIYO YUDEN

FIXED IND 150UH 45MA 3.2 OHM SMD

2819
LB2518T1R0MV

LB2518T1R0MV

TAIYO YUDEN

FIXED IND 1UH 665MA 60 MOHM SMD

0
LK21251R8K-T

LK21251R8K-T

TAIYO YUDEN

FIXED IND 1.8UH 80MA 450 MOHM

0
LB3218T221MV

LB3218T221MV

TAIYO YUDEN

FIXED IND 220UH 80MA 7.02OHM SMD

0
LK16083R3K-T

LK16083R3K-T

TAIYO YUDEN

FIXED IND 3.3UH 30MA 1.3 OHM SMD

10450
BRC1608TR35M

BRC1608TR35M

TAIYO YUDEN

FIXED IND 350NH 810MA 80 MOHM

0
LHL10NB272J

LHL10NB272J

TAIYO YUDEN

FIXED IND 2.7MH 240MA 4.3 OHM TH

0
LBC2518T1R0MRV

LBC2518T1R0MRV

TAIYO YUDEN

FIXED IND 1UH 890MA 84.5 MOHM

0
NRS6010T220MMGFV

NRS6010T220MMGFV

TAIYO YUDEN

FIXED IND 22UH 700MA 696 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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