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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
SBC7-681-701

SBC7-681-701

KEMET

FIXED IND 680UH 700MA 810 MOHM

175
MPLCG0630L1R0

MPLCG0630L1R0

KEMET

FIXED IND 1UH 11.9A 9 MOHM SMD

0
MPX1D0624LR22

MPX1D0624LR22

KEMET

FIXED IND 220NH 19.4A 3.3 MOHM

3000
SBCP-87HY6R8H

SBCP-87HY6R8H

KEMET

FIXED IND 6.8UH 2.8A 40 MOHM TH

1989
SBC3-682-111

SBC3-682-111

KEMET

FIXED IND 6.8MH 110MA 14.5 OHM

387
MPXV1D0650L100

MPXV1D0650L100

KEMET

FIXED IND 10UH 4.8A 61.4MOHM SMD

972
MPC0740LR42C

MPC0740LR42C

KEMET

FIXED IND 420NH 22A 1.55 MOHM

46
MPX1D0618LR15

MPX1D0618LR15

KEMET

FIXED IND 150NH 16.2A 3.8 MOHM

945
SBCP-14HY472B

SBCP-14HY472B

KEMET

FIXED IND 4.7MH 270MA 4.97 OHM

185
L0806C1R5MDMIT

L0806C1R5MDMIT

KEMET

FIXED IND 1.5UH 1.2A 130 MOHM

3000
MPXV1D0624L4R7

MPXV1D0624L4R7

KEMET

FIXED IND 4.7UH 4.9A 50.6 MOHM

1000
L1007C101KPWST

L1007C101KPWST

KEMET

FIXED IND 100UH 55MA 2.1 OHM SMD

1792
SBC9-221-821

SBC9-221-821

KEMET

FIXED IND 220UH 820MA 410 MOHM

239
MPXV1D0830L220

MPXV1D0830L220

KEMET

FIXED IND 22UH 3.6A 134.5 MOHM

949
MPCH1060LR45

MPCH1060LR45

KEMET

FIXED IND 450NH 32A 0.76 MOHM

1250
MPX1D1235L1R5

MPX1D1235L1R5

KEMET

FIXED IND 1.5UH 17.9A 6 MOHM SMD

500
MPX1D1740LR47

MPX1D1740LR47

KEMET

FIXED IND 470NH 34A 1.8 MOHM

100
SBC6-332-281

SBC6-332-281

KEMET

FIXED IND 3.3MH 280MA 4.24 OHM

196
SNG-19B-080

SNG-19B-080

KEMET

FIXED IND 80UH 10 MOHM CHASSIS

249
L0603B4R7MDWFT

L0603B4R7MDWFT

KEMET

FIXED IND 4.7UH 470MA 240 MOHM

2750

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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