Fixed Inductors

Part Number	Description / PDF	Quantity
AWVS00606028101M00 Chilisin Electronics	FIXED IND 100UH 800MA 600 MOHM	2993
AMRU000404204R7MB1 Chilisin Electronics	FIXED IND 4.7UH 2.2A 105 MOHM	3880
BWVF002520123R3M00 Chilisin Electronics	FIXED IND 3.3UH 1.5A 130 MOHM	3933
BSCH001005055N1SCP Chilisin Electronics	FIXED IND 5.1NH 400MA 200 MOHM	19552
BSPQ0006030410NH00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
APSC00101140330M00 Chilisin Electronics	FIXED IND 33UH 98MOHM SMD	1978
BWVS004040182R2M00 Chilisin Electronics	FIXED IND 2.2UH 2.5A 60 MOHM SMD	1055
BMRA000505151R0MA1 Chilisin Electronics	FIXED IND 1UH 5A 33 MOHM SMD	1965
BKPB002016104R7MA2 Chilisin Electronics	FIXED IND 4.7UH 800MA 210 MOHM	5760
BSPQ0006030418NH00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BWVS00606028100M00 Chilisin Electronics	FIXED IND 10UH 2.3A 65 MOHM SMD	2200
BSCH00100505R15JCS Chilisin Electronics	FIXED IND 150NH 100MA 3.5OHM SMD	19867
BSPQ000603044N7H00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BWCS00231715R39G00 Chilisin Electronics	FIXED IND 390NH 290MA 1.5OHM SMD	4000
APSD00060530100M00 Chilisin Electronics	FIXED IND 10UH 120MOHM SMD	4000
BMRF001010401R0MD1 Chilisin Electronics	FIXED IND 1UH 20A 3.1 MOHM SMD	964
BWCS0012070712NG00 Chilisin Electronics	FIXED IND 12NH 640MA 120MOHM SMD	6402
BMCA000606304R7MD1 Chilisin Electronics	FIXED IND 4.7UH 5.5A 40 MOHM SMD	1978
BSCQ000603036N8H00 Chilisin Electronics	FIXED IND 6.8NH 305MA 550 MOHM	29792
BWVF002520121R0M00 Chilisin Electronics	FIXED IND 1UH 2.4A 50 MOHM 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