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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
NRS6045T6R3MMGKV

NRS6045T6R3MMGKV

TAIYO YUDEN

FIXED IND 6.3UH 3A 46.8 MOHM SMD

14540
NRS6020T0R8NMGG

NRS6020T0R8NMGG

TAIYO YUDEN

FIXED IND 800NH 4.1A 24 MOHM SMD

0
NRS8040T3R3NJGJ

NRS8040T3R3NJGJ

TAIYO YUDEN

FIXED IND 3.3UH 4.9A 19.5 MOHM

0
LK1005R33M-TV

LK1005R33M-TV

TAIYO YUDEN

FIXED IND 330NH 25MA 1.05 OHM

0
HKQ0603W20NH-T

HKQ0603W20NH-T

TAIYO YUDEN

FIXED IND 20NH 180MA 1.2 OHM SMD

9310
LBR2012T2R2MV

LBR2012T2R2MV

TAIYO YUDEN

FIXED IND 2.2UH 260MA 130 MOHM

4337
LHL10NB3R9M

LHL10NB3R9M

TAIYO YUDEN

FIXED IND 3.9UH 4.1A 22 MOHM TH

0
NR5040T6R8M

NR5040T6R8M

TAIYO YUDEN

FIXED IND 6.8UH 2.3A 63.7 MOHM

1411
LHL10NB4R7M

LHL10NB4R7M

TAIYO YUDEN

FIXED IND 4.7UH 4A 24 MOHM TH

0
NRS6028T150MMGJV

NRS6028T150MMGJV

TAIYO YUDEN

FIXED IND 15UH 1.8A 123.5 MOHM

0
NRS4018T220MDGJ

NRS4018T220MDGJ

TAIYO YUDEN

FIXED IND 22UH 720MA 348 MOHM

16017
CK16084R7M-T

CK16084R7M-T

TAIYO YUDEN

FIXED IND 4.7UH 60MA 585 MOHM

0
NS12575T470MN

NS12575T470MN

TAIYO YUDEN

FIXED IND 47UH 2.95A 61.8 MOHM

2737
CKP2520N4R7M-T

CKP2520N4R7M-T

TAIYO YUDEN

FIXED IND 4.7UH 1.1A 160 MOHM

0
HK2125R12K-T

HK2125R12K-T

TAIYO YUDEN

FIXED IND 120NH 300MA 950 MOHM

0
NRS2012T4R7MGJ

NRS2012T4R7MGJ

TAIYO YUDEN

FIXED IND 4.7UH 910MA 241 MOHM

0
CBC3225T221MR

CBC3225T221MR

TAIYO YUDEN

FIXED IND 220UH 190MA 3.25 OHM

0
NRS8040T0R9NJGJV

NRS8040T0R9NJGJV

TAIYO YUDEN

FIXED IND 900NH 7.8A 7.8 MOHM

0
HKQ0603S0N9C-T

HKQ0603S0N9C-T

TAIYO YUDEN

FIXED IND 0.9NH 520MA 80 MOHM

1496
NR8040T6R8N

NR8040T6R8N

TAIYO YUDEN

FIXED IND 6.8UH 3.7A 32.5 MOHM

14956

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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