Fixed Inductors

Part Number	Description / PDF	Quantity
ISC1210SYR68J Vishay / Dale	FIXED IND 680NH 450MA 480 MOHM	0
IMC1812RVR22K Vishay / Dale	FIXED IND 220NH 450MA 400 MOHM	0
IMC1210ER47NM Vishay / Dale	FIXED IND 47NH 483MA 300 MOHM	0
IHLP4040DZEB1R0M01 Vishay / Dale	FIXED IND 1UH 17.5A 4.1 MOHM SMD	0
IMC1812ES820J Vishay / Dale	FIXED IND 82UH 120MA 7 OHM SMD	0
IMC0805ER2R2J01 Vishay / Dale	FIXED IND 2.2UH 110MA 3.1 OHM	0
IHLP5050EZER820M5A Vishay / Dale	FIXED IND 82UH 3A 201 MOHM SMD	105
ISC1812ES271K Vishay / Dale	FIXED IND 270UH 101MA 6.9 OHM	0
ISC1210SY680J Vishay / Dale	FIXED IND 68UH 90MA 10 OHM SMD	0
IHLP5050FDERR68M01 Vishay / Dale	FIXED IND 680NH 35A 1.6 MOHM SMD	0
ISC1812BNR47K Vishay / Dale	FIXED IND 470NH 342MA 600 MOHM	0
ISC1812ER561K Vishay / Dale	FIXED IND 560UH 82MA 10.5 OHM	0
IHLP5050FDER1R5M01 Vishay / Dale	FIXED IND 1.5UH 27A 3 MOHM SMD	0
IHLP4040DZEB2R2M01 Vishay / Dale	FIXED IND 2.2UH 12A 9 MOHM SMD	0
ILSB1206ERR47K Vishay / Dale	FIXED IND 470NH 200MA 600 MOHM	0
IMC1812BN331J Vishay / Dale	FIXED IND 330UH 85MA 14 OHM SMD	0
IMC1210SY1R0K Vishay / Dale	FIXED IND 1UH 400MA 700 MOHM SMD	0
IHLP2020BZER100M11 Vishay / Dale	FIXED IND 10UH 2.2A 182.8 MOHM	6314
ISC1812RQ121K Vishay / Dale	FIXED IND 120UH 139MA 3.64 OHM	0
ISC1812RQR15K Vishay / Dale	FIXED IND 150NH 491MA 290 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

Type	Functional Characteristics	Application Examples
Wirewound Inductors	High precision, high current handling, low resistance	Power supplies, DC-DC converters
Chip Inductors	Compact SMD package, stable performance at high frequencies	Mobile devices, RF circuits
Ferrite Bead Inductors	Effective high-frequency noise suppression	EMI filtering in digital circuits
Thin-Film Inductors	Ultra-compact, high Q-factor, tight tolerance	5G 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

Parameter	Description	Importance
Inductance (L)	Measured in henrys (H), determines energy storage capacity	Defines filtering/energy storage performance
Rated Current (I_rated)	Maximum DC current before saturation	Prevents core saturation and failure
DC Resistance (DCR)	Resistance of coil windings	Affects efficiency and thermal performance
Self-Resonant Frequency (SRF)	Frequency where inductor behaves as capacitor	Limits effective operating frequency range
Q Factor	Quality factor indicating efficiency	Higher 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

Manufacturer	Representative Product	Key Features
Murata	LQH3NPN100M	10 H, 1.2A, 1.8 1.4mm chip inductor
TDK	MLZ2012A100T	100MHz SRF, 1.0 1.25mm for RF circuits
Vishay	IHLP2525CZER1R0M	1 H, 12A, composite construction
Coilcraft	0402DC-103J	10 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