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Fixed Inductors

Image Part Number Description / PDF Quantity Rfq
IHLP5050CEER100M01

IHLP5050CEER100M01

Vishay / Dale

FIXED IND 10UH 7A 34 MOHM SMD

4568
IMC1812RQ180J

IMC1812RQ180J

Vishay / Dale

FIXED IND 18UH 190MA 2.8 OHM SMD

0
IMC1210SY1R2J

IMC1210SY1R2J

Vishay / Dale

FIXED IND 1.2UH 390MA 750 MOHM

0
IHLP3232CZER8R2M01

IHLP3232CZER8R2M01

Vishay / Dale

FIXED IND 8.2UH 4.8A 59.3 MOHM

0
IHLP4040DZER5R6M5A

IHLP4040DZER5R6M5A

Vishay / Dale

FIXED IND 5.6UH 9.3A 17.6 MOHM

0
IMC1812RV820J

IMC1812RV820J

Vishay / Dale

FIXED IND 82UH 120MA 7 OHM SMD

0
ISC1812ERR22M

ISC1812ERR22M

Vishay / Dale

FIXED IND 220NH 441MA 360 MOHM

0
ISC1210EB180J

ISC1210EB180J

Vishay / Dale

FIXED IND 18UH 155MA 2.7 OHM SMD

0
ILSB1206ER3R9K

ILSB1206ER3R9K

Vishay / Dale

FIXED IND 3.9UH 50MA 800 MOHM

0
IHSM4825ER330L

IHSM4825ER330L

Vishay / Dale

FIXED IND 33UH 1.3A 222 MOHM SMD

0
IHLP1212BZEV1R5M5A

IHLP1212BZEV1R5M5A

Vishay / Dale

FIXED IND 1.5UH 4.7A 45MOHM SMD

0
ISC1210EB560K

ISC1210EB560K

Vishay / Dale

FIXED IND 56UH 95MA 10 OHM SMD

0
ISC1210SY33NM

ISC1210SY33NM

Vishay / Dale

FIXED IND 33NH 585MA 180 MOHM

0
ISC1210ER820K

ISC1210ER820K

Vishay / Dale

FIXED IND 82UH 85MA 11 OHM SMD

0
IHLP5050FDER5R6M5A

IHLP5050FDER5R6M5A

Vishay / Dale

FIXED IND 5.6UH 13.8A 9.11 MOHM

0
ISC1812ER101J

ISC1812ER101J

Vishay / Dale

FIXED IND 100UH 147MA 3.25 OHM

1089
ISC1812ES820K

ISC1812ES820K

Vishay / Dale

FIXED IND 82UH 156MA 2.86 OHM

0
IMC1210SY151J

IMC1210SY151J

Vishay / Dale

FIXED IND 150UH 65MA 15 OHM SMD

0
IFSC1111AZER6R8M01

IFSC1111AZER6R8M01

Vishay / Dale

FIXED IND 6.8UH 900MA 230 MOHM

0
ISC1210BN39NM

ISC1210BN39NM

Vishay / Dale

FIXED IND 39NH 530MA 240 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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