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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
BRL3225T101K

BRL3225T101K

TAIYO YUDEN

FIXED IND 100UH 250MA 3 OHM SMD

37650
NRS4012T3R3MDGJ

NRS4012T3R3MDGJ

TAIYO YUDEN

FIXED IND 3.3UH 1.7A 84 MOHM SMD

4163
NS12575T101MN

NS12575T101MN

TAIYO YUDEN

FIXED IND 100UH 2.01A 132 MOHM

12469
NRS6045T6R8MMGK

NRS6045T6R8MMGK

TAIYO YUDEN

FIXED IND 6.8UH 3A 46.8 MOHM SMD

2638
MAKK2520HR22M

MAKK2520HR22M

TAIYO YUDEN

FIXED IND 220NH 4.9A 21 MOHM SMD

3203
CBC2012T470M

CBC2012T470M

TAIYO YUDEN

FIXED IND 47UH 150MA 7.54 OHM

10970
HK1608R27H-T

HK1608R27H-T

TAIYO YUDEN

FIXED IND 270NH 150MA 1.9 OHM

0
NRS5020T101MMGJV

NRS5020T101MMGJV

TAIYO YUDEN

FIXED IND 100UH 400MA 1.02 OHM

0
LK2125R22M-T

LK2125R22M-T

TAIYO YUDEN

FIXED IND 220NH 250MA 300 MOHM

0
LBC2012T470K

LBC2012T470K

TAIYO YUDEN

FIXED IND 47UH 90MA 5.8 OHM SMD

0
LK10051R8K-T

LK10051R8K-T

TAIYO YUDEN

FIXED IND 1.8UH 20MA 1.16 OHM

0
CBC2518T100MV

CBC2518T100MV

TAIYO YUDEN

FIXED IND 10UH 375MA 468 MOHM

0
LK16084R7K-T

LK16084R7K-T

TAIYO YUDEN

FIXED IND 4.7UH 30MA 1.6 OHM SMD

3850
LK16082R7K-T

LK16082R7K-T

TAIYO YUDEN

FIXED IND 2.7UH 30MA 1.15 OHM

2748
CKP2012E2R2M-T

CKP2012E2R2M-T

TAIYO YUDEN

FIXED IND 2.2UH 1.3A 160 MOHM

0
NS10155T4R7NNA

NS10155T4R7NNA

TAIYO YUDEN

FIXED IND 4.7UH 6.01A 13.2 MOHM

2441
LBC2016T680M

LBC2016T680M

TAIYO YUDEN

FIXED IND 68UH 95MA 7 OHM SMD

0
NR6012T2R5NE

NR6012T2R5NE

TAIYO YUDEN

FIXED IND 2.5UH 1.73A 108 MOHM

0
MCEK1210T1R0MHN

MCEK1210T1R0MHN

TAIYO YUDEN

FIXED IND 1UH 1.1A 179 MOHM SMD

8871
NRS6012T5R3MMGJV

NRS6012T5R3MMGJV

TAIYO YUDEN

FIXED IND 5.3UH 1.55A 150 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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