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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
LK21252R2M-T

LK21252R2M-T

TAIYO YUDEN

FIXED IND 2.2UH 50MA 500 MOHM

0
MEKK2016TR68M

MEKK2016TR68M

TAIYO YUDEN

FIXED IND 680NH 3.3A 52 MOHM SMD

4545
NRS8040T4R7NJGJV

NRS8040T4R7NJGJV

TAIYO YUDEN

FIXED IND 4.7UH 4.1A 23.4 MOHM

879
NRS4018T470MDGJ

NRS4018T470MDGJ

TAIYO YUDEN

FIXED IND 47UH 440MA 780 MOHM

7181
MDMK2020T4R7MMV

MDMK2020T4R7MMV

TAIYO YUDEN

FIXED IND 4.7UH 242 MOHM SMD

507
NRH3012T3R3MN

NRH3012T3R3MN

TAIYO YUDEN

FIXED IND 3.3UH 1.21A 120 MOHM

2854
MAKK2520H1R0M

MAKK2520H1R0M

TAIYO YUDEN

FIXED IND 1UH 3A 53 MOHM SMD

4942
LB2518T6R8M

LB2518T6R8M

TAIYO YUDEN

FIXED IND 6.8UH 195MA 150 MOHM

0
LBC2518T1R5M

LBC2518T1R5M

TAIYO YUDEN

FIXED IND 1.5UH 730MA 110 MOHM

0
CBC3225T101MR

CBC3225T101MR

TAIYO YUDEN

FIXED IND 100UH 340MA 1.82 OHM

13433
NRS8030T220MJGJ

NRS8030T220MJGJ

TAIYO YUDEN

FIXED IND 22UH 1.9A 91 MOHM SMD

0
HKQ0603S9N1H-T

HKQ0603S9N1H-T

TAIYO YUDEN

FIXED IND 9.1NH 170MA 730 MOHM

9314
NS12565T330MN

NS12565T330MN

TAIYO YUDEN

FIXED IND 33UH 3.22A 46.8 MOHM

1190
NRS5024T3R3NMGJV

NRS5024T3R3NMGJV

TAIYO YUDEN

FIXED IND 3.3UH 2.4A 51.6 MOHM

0
LHL10NB182J

LHL10NB182J

TAIYO YUDEN

FIXED IND 1.8MH 290MA 3 OHM TH

0
CB2012T4R7M

CB2012T4R7M

TAIYO YUDEN

FIXED IND 4.7UH 580MA 520 MOHM

34914
LHL10TB270K

LHL10TB270K

TAIYO YUDEN

FIXED IND 27UH 2A 69 MOHM TH

0
NRS6020T220MMGGV

NRS6020T220MMGGV

TAIYO YUDEN

FIXED IND 22UH 950MA 348 MOHM

2332
NRV3012T1R5NV

NRV3012T1R5NV

TAIYO YUDEN

FIXED IND 1.5UH 1.61A 75 MOHM

0
LB2518T470MV

LB2518T470MV

TAIYO YUDEN

FIXED IND 47UH 85MA 1.235 OHM

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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