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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
CK21251R5M-T

CK21251R5M-T

TAIYO YUDEN

FIXED IND 1.5UH 170MA 280 MOHM

0
LHL10TB183J

LHL10TB183J

TAIYO YUDEN

FIXED IND 18MH 81MA 38 OHM TH

0
LBC2518T330M

LBC2518T330M

TAIYO YUDEN

FIXED IND 33UH 185MA 1.5 OHM SMD

0
MDKK3030T2R2MMV

MDKK3030T2R2MMV

TAIYO YUDEN

FIXED IND 2.2UH 2.2A 144 MOHM

0
BRC2016T220K

BRC2016T220K

TAIYO YUDEN

FIXED IND 22UH 310MA 1.3 OHM SMD

1501
NRS5014T3R3NMGG

NRS5014T3R3NMGG

TAIYO YUDEN

FIXED IND 3.3UH 1.7A 96 MOHM SMD

393
LK2125270M-T

LK2125270M-T

TAIYO YUDEN

FIXED IND 27UH 5MA 1 OHM SMD

0
NRS6045T680MMGKV

NRS6045T680MMGKV

TAIYO YUDEN

FIXED IND 68UH 950MA 395.2 MOHM

1016
NRS5014T6R8MMGG

NRS5014T6R8MMGG

TAIYO YUDEN

FIXED IND 6.8UH 1.2A 150 MOHM

1852
BRC2016T6R8M

BRC2016T6R8M

TAIYO YUDEN

FIXED IND 6.8UH 560MA 429 MOHM

1527
HK21256N8J-T

HK21256N8J-T

TAIYO YUDEN

FIXED IND 6.8NH 300MA 250 MOHM

3759
NR4012T6R8M

NR4012T6R8M

TAIYO YUDEN

FIXED IND 6.8UH 840MA 216 MOHM

0
HK10053N3S-TV

HK10053N3S-TV

TAIYO YUDEN

FIXED IND 3.3NH 300MA 160 MOHM

3206
NRS6045T4R5MMGKV

NRS6045T4R5MMGKV

TAIYO YUDEN

FIXED IND 4.5UH 3.1A 39 MOHM SMD

459
HK10054N7K-T

HK10054N7K-T

TAIYO YUDEN

FIXED IND 4.7NH 500MA 210 MOHM

0
HKQ04021N9C-T

HKQ04021N9C-T

TAIYO YUDEN

FIXED IND 1.9NH 310MA 210 MOHM

0
NS12575T220MN

NS12575T220MN

TAIYO YUDEN

FIXED IND 22UH 4.05A 31.2 MOHM

2275
CBC2012T1R0M

CBC2012T1R0M

TAIYO YUDEN

FIXED IND 1UH 840MA 247 MOHM SMD

390
NR10050T680M

NR10050T680M

TAIYO YUDEN

FIXED IND 68UH 1.5A 187.2 MOHM

0
BRC1608TR72M6

BRC1608TR72M6

TAIYO YUDEN

FIXED IND 720NH 810MA 144 MOHM

1835

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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