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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
HKQ0603S2N0C-T

HKQ0603S2N0C-T

TAIYO YUDEN

FIXED IND 2NH 300MA 240 MOHM SMD

9610
HK212568NJ-T

HK212568NJ-T

TAIYO YUDEN

FIXED IND 68NH 300MA 800 MOHM

0
LHL10TB181K

LHL10TB181K

TAIYO YUDEN

FIXED IND 180UH 800MA 400 MOHM

0
HK160812NK-T

HK160812NK-T

TAIYO YUDEN

FIXED IND 12NH 300MA 280 MOHM

0
NRS5040T4R7NMGKV

NRS5040T4R7NMGKV

TAIYO YUDEN

FIXED IND 4.7UH 3.1A 37.7 MOHM

5379
MBKK2012TR24N

MBKK2012TR24N

TAIYO YUDEN

FIXED IND 240NH 2.4A 41 MOHM SMD

635
NRH3012T2R2MNV

NRH3012T2R2MNV

TAIYO YUDEN

FIXED IND 2.2UH 1.37A 90 MOHM

2157
CKP2520V3R3M-T

CKP2520V3R3M-T

TAIYO YUDEN

FIXED IND 3.3UH 400MA 150 MOHM

285
EST1040T330MDGA

EST1040T330MDGA

TAIYO YUDEN

FIXED IND 33UH 1.1A 115 MOHM SMD

1400
LB2518T470KV

LB2518T470KV

TAIYO YUDEN

FIXED IND 47UH 85MA 1.235 OHM

0
HKQ0603W68NJ-T

HKQ0603W68NJ-T

TAIYO YUDEN

FIXED IND 68NH 120MA 3.1 OHM SMD

10160
NRS6028T470MMGJV

NRS6028T470MMGJV

TAIYO YUDEN

FIXED IND 47UH 920MA 390 MOHM

0
CBC3225T101KR

CBC3225T101KR

TAIYO YUDEN

FIXED IND 100UH 340MA 1.82 OHM

0
NS10165T3R3NNA

NS10165T3R3NNA

TAIYO YUDEN

FIXED IND 3.3UH 6.76A 10.8 MOHM

655
AQ1051N0S-T

AQ1051N0S-T

TAIYO YUDEN

FIXED IND 1NH 930MA 70 MOHM SMD

9940
LK1608R18K-T

LK1608R18K-T

TAIYO YUDEN

FIXED IND 180NH 100MA 500 MOHM

0
NS10165T150MNA

NS10165T150MNA

TAIYO YUDEN

FIXED IND 15UH 3.84A 30 MOHM SMD

434
LBC2016T1R0M

LBC2016T1R0M

TAIYO YUDEN

FIXED IND 1UH 690MA 100 MOHM SMD

0
MDWK4040T1R0MMV

MDWK4040T1R0MMV

TAIYO YUDEN

FIXED IND 1UH 5.1A 27MOHM SMD

36
NRS5010T3R3MMGFV

NRS5010T3R3MMGFV

TAIYO YUDEN

FIXED IND 3.3UH 1.25A 150 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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