Fixed Inductors

Part Number	Description / PDF	Quantity
BSPQ000603041N8B00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BWVF003030153R3M00 Chilisin Electronics	FIXED IND 3.3UH 1.8A 125 MOHM	3642
BWVS006060452R2M00 Chilisin Electronics	FIXED IND 2.2UH 5.1A 18.4 MOHM	1513
BSCH0016080810NJ00 Chilisin Electronics	FIXED IND 10NH 600MA 260MOHM SMD	10317
BWCS00161008R39G00 Chilisin Electronics	FIXED IND 390NH 100MA 4.35 OHM	3845
BSPQ000603049N1H00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BDHE00252012R47MQ1 Chilisin Electronics	FIXED IND 470NH 4.5A 33 MOHM SMD	4440
BSCH001005052N7SCP Chilisin Electronics	FIXED IND 2.7NH 400MA 150 MOHM	18258
BWVS005050401R5M00 Chilisin Electronics	FIXED IND 1.5UH 4.4A 16 MOHM SMD	2888
BSCH000603033N9S00 Chilisin Electronics	FIXED IND 3.9NH 300MA 270 MOHM	29992
BPSC00131380150M00 Chilisin Electronics	FIXED IND 15UH 34MOHM SMD	975
BWCS0012070733NG00 Chilisin Electronics	FIXED IND 33NH 400MA 400MOHM SMD	3975
BWCS00231715R27G00 Chilisin Electronics	FIXED IND 270NH 350MA 1OHM SMD	4000
BSCH0010050539NJCP Chilisin Electronics	FIXED IND 39NH 200MA 650MOHM SMD	19828
BKPB002012102R2MA2 Chilisin Electronics	FIXED IND 2.2UH 1.1A 190MOHM SMD	5456
BWVS005050204R7M00 Chilisin Electronics	FIXED IND 4.7UH 2.2A 60 MOHM SMD	783
BSCH000603038N2J00 Chilisin Electronics	FIXED IND 8.2NH 230MA 450 MOHM	21002
BSPQ000603042N4B00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BSCH001608081N5S00 Chilisin Electronics	FIXED IND 1.5NH 600MA 100 MOHM	3730
BPSD00080750100K00 Chilisin Electronics	FIXED IND 10UH 70MOHM SMD	1400

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