Fixed Inductors

Part Number	Description / PDF	Quantity
ISC1210BN6R8J Vishay / Dale	FIXED IND 6.8UH 205MA 1.6 OHM	0
IMC1812ET5R6K Vishay / Dale	FIXED IND 5.6UH 300MA 1.1 OHM	0
IMC1812EB330J Vishay / Dale	FIXED IND 33UH 160MA 4 OHM SMD	0
IHD1EB182L Vishay / Dale	FIXED IND 1.8MH 250MA 4 OHM TH	0
ISC1210BN680J Vishay / Dale	FIXED IND 68UH 90MA 10 OHM SMD	0
IMC1210BN180J Vishay / Dale	FIXED IND 18UH 151MA 3.3 OHM SMD	0
IMC1210BNR82K Vishay / Dale	FIXED IND 820NH 450MA 670 MOHM	0
ISC1812BN5R6J Vishay / Dale	FIXED IND 5.6UH 333MA 690 MOHM	0
IMC1210EBR33K Vishay / Dale	FIXED IND 330NH 453MA 400 MOHM	0
ISC1812ER3R9K Vishay / Dale	FIXED IND 3.9UH 344MA 590 MOHM	0
IHSM5832ER121L Vishay / Dale	FIXED IND 120UH 880MA 530 MOHM	0
IHLP1212ABEVR10M5A Vishay / Dale	FIXED IND 0.1 UH 11.5A 7.5 MOHM	0
IHLP2020CZER100M11 Vishay / Dale	FIXED IND 10UH 2.75A 131.9 MOHM	0
IMC1210BN18NK Vishay / Dale	FIXED IND 18NH 624MA 180 MOHM	0
ISC1812RV100J Vishay / Dale	FIXED IND 10UH 279MA 900 MOHM	0
IMC1812EB56NM Vishay / Dale	FIXED IND 56NH 450MA 350 MOHM	0
ISC1812RVR10M Vishay / Dale	FIXED IND 100NH 552MA 230 MOHM	0
IMC1812EB181J Vishay / Dale	FIXED IND 180UH 102MA 9.5 OHM	0
IHLP1212AEERR22M11 Vishay / Dale	FIXED IND 220NH 8.5A 11.4 MOHM	7989
IMC1812RQ102K Vishay / Dale	FIXED IND 1MH 30MA 40 OHM SMD	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