Fixed Inductors

Part Number	Description / PDF	Quantity
BMQA000606302R2MA1 Chilisin Electronics	FIXED IND 2.2UH 11A 9.4 MOHM SMD	1866
BWCS00231715R18G00 Chilisin Electronics	FIXED IND 180NH 400MA 640 MOHM	4000
BWCS00231715R33G00 Chilisin Electronics	FIXED IND 330NH 310MA 1.4OHM SMD	4000
BSCH0016080833NJ00 Chilisin Electronics	FIXED IND 33NH 400MA 550MOHM SMD	5407
BWVS00606045220M00 Chilisin Electronics	FIXED IND 22UH 1.9A 125 MOHM SMD	0
BWLS001611091R0J00 Chilisin Electronics	FIXED IND 1UH 600MA 810 MOHM SMD	6410
BWCS0023171522NG00 Chilisin Electronics	FIXED IND 22NH 500MA 220MOHM SMD	3650
BSCH001005051N5SCP Chilisin Electronics	FIXED IND 1.5NH 400MA 100 MOHM	19562
BPSD00060545100K00 Chilisin Electronics	FIXED IND 10UH 100MOHM SMD	2975
BKPB001608DZ2R2MA2 Chilisin Electronics	FIXED IND 2.2UH 750MA 300 MOHM	7982
BMRHDY1010302R2MA1 Chilisin Electronics	FIXED INDUCTOR 2.2UH SMD	930
BDHE002520121R0MQ1 Chilisin Electronics	FIXED IND 1UH 4.1A 42 MOHM SMD	4791
BSCH0010050527NJCP Chilisin Electronics	FIXED IND 27NH 300MA 460MOHM SMD	9795
BSCH001608081N2S00 Chilisin Electronics	FIXED IND 1.2NH 600MA 100 MOHM	7470
BWLS002417154R7J00 Chilisin Electronics	FIXED IND 4.7UH 530MA 1.6 OHM	3971
BWVF003030152R2M00 Chilisin Electronics	FIXED IND 2.2UH 2A 90 MOHM SMD	1604
BWVF003030151R5M00 Chilisin Electronics	FIXED IND 1.5UH 2.6A 63 MOHM SMD	3895
BSCH0016080847NJ00 Chilisin Electronics	FIXED IND 47NH 400MA 700MOHM SMD	3720
BWCS001610086N8G00 Chilisin Electronics	FIXED IND 6.8NH 700MA 110 MOHM	0
AWVS00606045101M00 Chilisin Electronics	FIXED IND 100UH 800MA 500 MOHM	2000

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