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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
MCHK1608TR47MKN

MCHK1608TR47MKN

TAIYO YUDEN

FIXED IND 0.47UH 3.3A 43 MOHM

7140
LB2518T331M

LB2518T331M

TAIYO YUDEN

FIXED IND 330UH 30MA 7 OHM SMD

0
NS12555T221MN

NS12555T221MN

TAIYO YUDEN

FIXED IND 220UH 1.18A 324 MOHM

78
LB2518T220KV

LB2518T220KV

TAIYO YUDEN

FIXED IND 22UH 115MA 500 MOHM

2565
BRL2518T2R2M

BRL2518T2R2M

TAIYO YUDEN

FIXED IND 2.2UH 850MA 175.5 MOHM

731
NR4012T220M

NR4012T220M

TAIYO YUDEN

FIXED IND 22UH 540MA 576 MOHM

4018
MAKK2016H1R0M

MAKK2016H1R0M

TAIYO YUDEN

FIXED IND 1UH 2.3A 70 MOHM SMD

8057
BRL2012T2R2M

BRL2012T2R2M

TAIYO YUDEN

FIXED IND 2.2UH 550MA 390 MOHM

7352
NRS6014T4R7MMGGV

NRS6014T4R7MMGGV

TAIYO YUDEN

FIXED IND 4.7UH 1.9A 108 MOHM

0
NRS4010T330MDGG

NRS4010T330MDGG

TAIYO YUDEN

FIXED IND 33UH 350MA 1.08 OHM

0
CBC2518T100M

CBC2518T100M

TAIYO YUDEN

FIXED IND 10UH 680MA 468 MOHM

253
BRC2518T100K

BRC2518T100K

TAIYO YUDEN

FIXED IND 10UH 610MA 455 MOHM

2964
LBM2016T220J

LBM2016T220J

TAIYO YUDEN

FIXED IND 22UH 140MA 2.8 OHM SMD

0
LK1005R15K-T

LK1005R15K-T

TAIYO YUDEN

FIXED IND 150NH 25MA 630 MOHM

0
LK2125R82M-T

LK2125R82M-T

TAIYO YUDEN

FIXED IND 820NH 150MA 650 MOHM

0
NRS8030T4R7MJGJ

NRS8030T4R7MJGJ

TAIYO YUDEN

FIXED IND 4.7UH 4A 28.6 MOHM SMD

7515
NRS3015T100MNGHV

NRS3015T100MNGHV

TAIYO YUDEN

FIXED IND 10UH 710MA 264 MOHM

2249
LHL10NB100K

LHL10NB100K

TAIYO YUDEN

FIXED IND 10UH 3.2A 34 MOHM TH

0
NR8040T101M

NR8040T101M

TAIYO YUDEN

FIXED IND 100UH 1A 377 MOHM SMD

50881
CB2012T100KRV

CB2012T100KRV

TAIYO YUDEN

FIXED IND 10UH 300MA 650 MOHM

1496

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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