Fixed Inductors

Part Number	Description / PDF	Quantity
BWVS005050202R2M00 Chilisin Electronics	FIXED IND 2.2UH 3.2A 35 MOHM SMD	3921
BSCH001608083N9S00 Chilisin Electronics	FIXED IND 3.9NH 600MA 140 MOHM	7287
BWVS005050403R3M00 Chilisin Electronics	FIXED IND 3.3UH 3.5A 26 MOHM SMD	1088
BSCH0006030312NJ00 Chilisin Electronics	FIXED IND 12NH 190MA 680MOHM SMD	29443
BSCH0010050556NJCP Chilisin Electronics	FIXED IND 56NH 200MA 820MOHM SMD	19842
BMRA000404202R2MA1 Chilisin Electronics	FIXED IND 2.2UH 3A 58 MOHM SMD	26961
BSCH0010050547NJCP Chilisin Electronics	FIXED IND 47NH 200MA 720MOHM SMD	9279
BWVS005050406R8M00 Chilisin Electronics	FIXED IND 6.8UH 2.4A 50 MOHM SMD	1245
AWVS00505020220M00 Chilisin Electronics	FIXED IND 22UH 1A 260 MOHM SMD	3885
BSCH000603033N6S00 Chilisin Electronics	FIXED IND 3.6NH 310MA 250 MOHM	29953
BSPQ000603046N2H00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BSCH0016080827NJ00 Chilisin Electronics	FIXED IND 27NH 500MA 450MOHM SMD	1184
BSPQ0006030415NH00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BMRF00101040R47MD1 Chilisin Electronics	FIXED IND 470NH 33A 1.2 MOHM SMD	993
BSCH0010050522NJCP Chilisin Electronics	FIXED IND 22NH 300MA 420MOHM SMD	19842
BWVF004040182R2M00 Chilisin Electronics	FIXED IND 2.2UH 2.7A 47 MOHM SMD	1130
BSCH001005051N8SCP Chilisin Electronics	FIXED IND 1.8NH 400MA 100 MOHM	29717
BWCS00161008R27G00 Chilisin Electronics	FIXED IND 270NH 170MA 2.8OHM SMD	7889
AWVF00252012100M00 Chilisin Electronics	FIXED IND 10UH 700MA 385 MOHM	4000
BPSC00101140470M00 Chilisin Electronics	FIXED IND 47UH 144MOHM SMD	1972

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