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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
BRC1608TR45M

BRC1608TR45M

TAIYO YUDEN

FIXED IND 450NH 800MA 90 MOHM

223
HK2125R12J-T

HK2125R12J-T

TAIYO YUDEN

FIXED IND 120NH 300MA 950 MOHM

0
LK1005R82M-TV

LK1005R82M-TV

TAIYO YUDEN

FIXED IND 820NH 20MA 590 MOHM

0
HK160822NJ-T

HK160822NJ-T

TAIYO YUDEN

FIXED IND 22NH 300MA 400 MOHM

2492
CBC2518T680M

CBC2518T680M

TAIYO YUDEN

FIXED IND 68UH 200MA 3.64 OHM

0
MDWK4040T2R2MM

MDWK4040T2R2MM

TAIYO YUDEN

FIXED IND 2.2UH 3.5A 54 MOHM SMD

8156
CB2518T101K

CB2518T101K

TAIYO YUDEN

FIXED IND 100UH 260MA 2.73 OHM

19389
MDMK4040T1R2MFV

MDMK4040T1R2MFV

TAIYO YUDEN

FIXED IND 1.2UH 47 MOHM SMD

1000
CBC2016T100M

CBC2016T100M

TAIYO YUDEN

FIXED IND 10UH 350MA 1.066 OHM

8577
NRS5012T150MMGFV

NRS5012T150MMGFV

TAIYO YUDEN

FIXED IND 15UH 640MA 804 MOHM

0
NRS5020TR47NMGJV

NRS5020TR47NMGJV

TAIYO YUDEN

FIXED IND 470NH 5A 14.4 MOHM SMD

800
CK1608100M-T

CK1608100M-T

TAIYO YUDEN

FIXED IND 10UH 50MA 1.105 OHM

1817
BRHL2518T1R0M

BRHL2518T1R0M

TAIYO YUDEN

FIXED IND 1UH 1.4A 71.5 MOHM SMD

572
NRH2412TR47NNGJV

NRH2412TR47NNGJV

TAIYO YUDEN

FIXED IND 470NH 2.1A 60 MOHM SMD

0
NS12575T101MNV

NS12575T101MNV

TAIYO YUDEN

FIXED IND 100UH 2.01A 132 MOHM

0
BRC1608TR43M6

BRC1608TR43M6

TAIYO YUDEN

FIXED IND 430NH 1.1A 82 MOHM SMD

5554
LBC2518T220MV

LBC2518T220MV

TAIYO YUDEN

FIXED IND 22UH 250MA 1.001 OHM

0
HKQ0603U3N9B-T

HKQ0603U3N9B-T

TAIYO YUDEN

FIXED IND 3.9NH 350MA 410 MOHM

3396
NR4012T470M

NR4012T470M

TAIYO YUDEN

FIXED IND 47UH 370MA 1.2 OHM SMD

0
NRS6045T330MMGKV

NRS6045T330MMGKV

TAIYO YUDEN

FIXED IND 33UH 1.4A 183.3 MOHM

1253

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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