Fixed Inductors

Part Number	Description / PDF	Quantity
BSCH001608081N0S00 Chilisin Electronics	FIXED IND 1NH 600MA 100MOHM SMD	6571
BPSC00101140101M00 Chilisin Electronics	FIXED IND 100UH 304MOHM SMD	1828
EHEI201608A-1R0M-Q8DG Chilisin Electronics	FIXED INDUCTOR	12000
BWCS001207071N9B00 Chilisin Electronics	FIXED IND 1.9NH 1.04A 70MOHM SMD	3834
BSPQ000603046N8H00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BWVS005050404R7M00 Chilisin Electronics	FIXED IND 4.7UH 3.2A 32 MOHM SMD	0
BWVS005050201R0M00 Chilisin Electronics	FIXED IND 1UH 4A 21 MOHM SMD	3868
BSCQ000603031N5B00 Chilisin Electronics	FIXED IND 1.5NH 600MA 150 MOHM	28220
BMRA000606301R5MA1 Chilisin Electronics	FIXED IND 1.5UH 9.5A 15 MOHM SMD	1572
BSCH000603032N2S00 Chilisin Electronics	FIXED IND 2.2NH 360MA 190 MOHM	28680
BSCH0010050533NJCP Chilisin Electronics	FIXED IND 33NH 200MA 580MOHM SMD	19854
BKPB002520122R2MA2 Chilisin Electronics	FIXED IND 2.2UH 1.2A 100 MOHM	6000
BWVS00808040101M00 Chilisin Electronics	FIXED IND 100UH 1.1A 340 MOHM	1922
BWVS008080404R7M00 Chilisin Electronics	FIXED IND 4.7UH 5.5A 18 MOHM SMD	5837
BSCH00160808R39J00 Chilisin Electronics	FIXED IND 390NH 100MA 3OHM SMD	7970
BSPQ000603040N6B00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
AMRU00040412R47MA1 Chilisin Electronics	FIXED IND 470NH 5A 20 MOHM SMD	4000
BDHE002520122R2MQ1 Chilisin Electronics	FIXED IND 2.2UH 2.9A 83 MOHM SMD	1007
BWCS001207072N2B00 Chilisin Electronics	FIXED IND 2.2NH 960MA 70MOHM SMD	7895
BSCQ000603031N0B00 Chilisin Electronics	FIXED IND 1NH 850MA 70MOHM SMD	27984

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