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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
NR10050T221M

NR10050T221M

TAIYO YUDEN

FIXED IND 220UH 800MA 585 MOHM

28773
LHL10NB471K

LHL10NB471K

TAIYO YUDEN

FIXED IND 470UH 570MA 840 MOHM

0
MDMK2020T2R2MM

MDMK2020T2R2MM

TAIYO YUDEN

FIXED IND 2.2UH 1.45A 109 MOHM

815
MBKK1608HR68N

MBKK1608HR68N

TAIYO YUDEN

FIXED IND 680NH 1.2A 120 MOHM

0
HK21255N6S-T

HK21255N6S-T

TAIYO YUDEN

FIXED IND 5.6NH 300MA 230 MOHM

5000
HK212547NJ-T

HK212547NJ-T

TAIYO YUDEN

FIXED IND 47NH 300MA 700 MOHM

1781
NR4012T1R0N

NR4012T1R0N

TAIYO YUDEN

FIXED IND 1UH 1.5A 72 MOHM SMD

0
NRS5030T1R0NMGJV

NRS5030T1R0NMGJV

TAIYO YUDEN

FIXED IND 1UH 4A 19.5 MOHM SMD

6831
NRS4018T150MDGJV

NRS4018T150MDGJV

TAIYO YUDEN

FIXED IND 15UH 850MA 252 MOHM

2036
LBC3225T4R7MR

LBC3225T4R7MR

TAIYO YUDEN

FIXED IND 4.7UH 680MA 100 MOHM

9530
CBC3225T101MRV

CBC3225T101MRV

TAIYO YUDEN

FIXED IND 100UH 220MA 1.82 OHM

0
CBC2518T471K

CBC2518T471K

TAIYO YUDEN

FIXED IND 470UH 70MA 28.6 OHM

12343
LBR2518T100K

LBR2518T100K

TAIYO YUDEN

FIXED IND 10UH 235MA 190 MOHM

2943
HKQ0603W12NH-T

HKQ0603W12NH-T

TAIYO YUDEN

FIXED IND 12NH 220MA 850 MOHM

9195
CBC2518T221M

CBC2518T221M

TAIYO YUDEN

FIXED IND 220UH 110MA 10.92 OHM

1233
NR4010T220M

NR4010T220M

TAIYO YUDEN

FIXED IND 22UH 400MA 1.044 OHM

0
LBM2016T4R7J

LBM2016T4R7J

TAIYO YUDEN

FIXED IND 4.7UH 270MA 1.014 OHM

1756
HKQ0603U1N4B-T

HKQ0603U1N4B-T

TAIYO YUDEN

FIXED IND 1.4NH 640MA 120 MOHM

14695
NRH3012T4R7MNV

NRH3012T4R7MNV

TAIYO YUDEN

FIXED IND 4.7UH 1.06A 156 MOHM

0
LK16081R5M-T

LK16081R5M-T

TAIYO YUDEN

FIXED IND 1.5UH 40MA 700 MOHM

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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