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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MBMK2520H4R7M

MBMK2520H4R7M

TAIYO YUDEN

FIXED IND 4.7UH 800MA 380 MOHM

3085
HK100568NJ-T

HK100568NJ-T

TAIYO YUDEN

FIXED IND 68NH 200MA 1.2 OHM SMD

10418
HKQ04021N7C-T

HKQ04021N7C-T

TAIYO YUDEN

FIXED IND 1.7NH 320MA 190 MOHM

0
BRL3225TR36M

BRL3225TR36M

TAIYO YUDEN

FIXED IND 360NH 2.75A 32.5 MOHM

0
MAMK2520HR33M

MAMK2520HR33M

TAIYO YUDEN

FIXED IND 330NH 4.4A 23 MOHM SMD

0
NRS2012T1R5NGJV

NRS2012T1R5NGJV

TAIYO YUDEN

FIXED IND 1.5UH 1.5A 90 MOHM SMD

0
LBC3225T3R3MR

LBC3225T3R3MR

TAIYO YUDEN

FIXED IND 3.3UH 820MA 95 MOHM

777
HKQ0603U12NH-T

HKQ0603U12NH-T

TAIYO YUDEN

FIXED IND 12NH 230MA 850 MOHM

12409
LK2125R82K-T

LK2125R82K-T

TAIYO YUDEN

FIXED IND 820NH 150MA 650 MOHM

1912
NRS3015T150MNGH

NRS3015T150MNGH

TAIYO YUDEN

FIXED IND 15UH 580MA 390 MOHM

0
NS12555T101MNV

NS12555T101MNV

TAIYO YUDEN

FIXED IND 100UH 1.86A 140.4 MOHM

280
LHL10TB220K

LHL10TB220K

TAIYO YUDEN

FIXED IND 22UH 2.1A 61 MOHM TH

0
NS10145T220MNA

NS10145T220MNA

TAIYO YUDEN

FIXED IND 22UH 2.55A 62.4 MOHM

2463
LK2125R10K-T

LK2125R10K-T

TAIYO YUDEN

FIXED IND 100NH 270MA 150 MOHM

0
BRFL2518T3R3M

BRFL2518T3R3M

TAIYO YUDEN

FIXED IND 3.3UH 700MA 286 MOHM

0
LBMF1608T220K

LBMF1608T220K

TAIYO YUDEN

FIXED IND 22UH 50MA 1 OHM SMD

2348
LBR2012T220M

LBR2012T220M

TAIYO YUDEN

FIXED IND 22UH 100MA 1 OHM SMD

0
NRS3015T220MNGHV

NRS3015T220MNGHV

TAIYO YUDEN

FIXED IND 22UH 470MA 624 MOHM

1999
LB2016T470KV

LB2016T470KV

TAIYO YUDEN

FIXED IND 47UH 70MA 2.4 OHM SMD

0
NR3012T470M

NR3012T470M

TAIYO YUDEN

FIXED IND 47UH 280MA 1.74 OHM

1035

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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