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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MDMK3030T1R0MM

MDMK3030T1R0MM

TAIYO YUDEN

FIXED IND 1UH 3.1A 50 MOHM SMD

3817
LK10051R5M-T

LK10051R5M-T

TAIYO YUDEN

FIXED IND 1.5UH 20MA 950 MOHM

0
NRS6014T150MMGGV

NRS6014T150MMGGV

TAIYO YUDEN

FIXED IND 15UH 1.2A 252 MOHM SMD

0
CBC2518T221MV

CBC2518T221MV

TAIYO YUDEN

FIXED IND 220UH 80MA 10.92 OHM

0
NR4012T2R2M

NR4012T2R2M

TAIYO YUDEN

FIXED IND 2.2UH 1.2A 108 MOHM

738
HK100539NJ-TV

HK100539NJ-TV

TAIYO YUDEN

FIXED IND 39NH 200MA 900 MOHM

0
NRS5030T470MMGJ

NRS5030T470MMGJ

TAIYO YUDEN

FIXED IND 47UH 700MA 325 MOHM

4488
NR6045T101M

NR6045T101M

TAIYO YUDEN

FIXED IND 100UH 700MA 650 MOHM

15263
CBC2518T331K

CBC2518T331K

TAIYO YUDEN

FIXED IND 330UH 90MA 15.99 OHM

29015
LK1005R22M-TV

LK1005R22M-TV

TAIYO YUDEN

FIXED IND 220NH 25MA 790 MOHM

0
HK100512NJ-T

HK100512NJ-T

TAIYO YUDEN

FIXED IND 12NH 330MA 400 MOHM

123920
LB3218T6R8M

LB3218T6R8M

TAIYO YUDEN

FIXED IND 6.8UH 380MA 170 MOHM

414
LHL08TB220K

LHL08TB220K

TAIYO YUDEN

FIXED IND 22UH 1.8A 68 MOHM TH

0
AQ1053N3S-T

AQ1053N3S-T

TAIYO YUDEN

FIXED IND 3.3NH 710MA 120 MOHM

7500
CB2012T100MR

CB2012T100MR

TAIYO YUDEN

FIXED IND 10UH 520MA 650 MOHM

628
LB2016T100KV

LB2016T100KV

TAIYO YUDEN

FIXED IND 10UH 155MA 500 MOHM

1028
NR6028T6R0M

NR6028T6R0M

TAIYO YUDEN

FIXED IND 6UH 2.5A 52 MOHM SMD

11
NRH2410T6R8MNV

NRH2410T6R8MNV

TAIYO YUDEN

FIXED IND 6.8UH 570MA 492 MOHM

0
BRC2518T220K

BRC2518T220K

TAIYO YUDEN

FIXED IND 22UH 490MA 560 MOHM

31853
CBC3225T220KRV

CBC3225T220KRV

TAIYO YUDEN

FIXED IND 22UH 500MA 351 MOHM

770

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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