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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
NR5040T330M

NR5040T330M

TAIYO YUDEN

FIXED IND 33UH 1.2A 234 MOHM SMD

43089
NS12565T7R0NN

NS12565T7R0NN

TAIYO YUDEN

FIXED IND 7UH 5.21A 19.44 MOHM

1682
CB2518T151K

CB2518T151K

TAIYO YUDEN

FIXED IND 150UH 210MA 4.16 OHM

2341
NS12555T152MN

NS12555T152MN

TAIYO YUDEN

FIXED IND 1.5MH 440MA 2.076 OHM

1496
HK21254N7K-T

HK21254N7K-T

TAIYO YUDEN

FIXED IND 4.7NH 300MA 200 MOHM

0
LB3218T681K

LB3218T681K

TAIYO YUDEN

FIXED IND 680UH 45MA 17 OHM SMD

1928
LBC2012T470M

LBC2012T470M

TAIYO YUDEN

FIXED IND 47UH 90MA 5.8 OHM SMD

0
LBMF1608T470K

LBMF1608T470K

TAIYO YUDEN

FIXED IND 47UH 35MA 2.5 OHM SMD

34893
HKQ040213NJ-T

HKQ040213NJ-T

TAIYO YUDEN

FIXED IND 13NH 140MA 1.32 OHM

0
CBC2016T220M

CBC2016T220M

TAIYO YUDEN

FIXED IND 22UH 240MA 2.34 OHM

1726
BRL3225T680M

BRL3225T680M

TAIYO YUDEN

FIXED IND 68UH 300MA 1.4 OHM SMD

0
LBC3225T220MR

LBC3225T220MR

TAIYO YUDEN

FIXED IND 22UH 330MA 270 MOHM

799
LB2016T2R2M

LB2016T2R2M

TAIYO YUDEN

FIXED IND 2.2UH 375MA 130 MOHM

1768
NR6045T150M

NR6045T150M

TAIYO YUDEN

FIXED IND 15UH 1.9A 100.1 MOHM

12019
NR6045T1R0N

NR6045T1R0N

TAIYO YUDEN

FIXED IND 1UH 4.2A 18.2 MOHM SMD

621
NRS6028T101MMGJ

NRS6028T101MMGJ

TAIYO YUDEN

FIXED IND 100UH 660MA 780 MOHM

15386
NRV3012T1R0N

NRV3012T1R0N

TAIYO YUDEN

FIXED IND 1UH 1.6A 78 MOHM SMD

0
MBKK2012TR47N

MBKK2012TR47N

TAIYO YUDEN

FIXED IND 470NH 1.65A 78 MOHM

3323
MDKK3030T3R3MMV

MDKK3030T3R3MMV

TAIYO YUDEN

FIXED IND 3.3UH 1.35A 248 MOHM

0
LB2518T150KV

LB2518T150KV

TAIYO YUDEN

FIXED IND 15UH 145MA 416 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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