Fixed Inductors

Part Number	Description / PDF	Quantity
BSCH001005056N8JCP Chilisin Electronics	FIXED IND 6.8NH 400MA 240 MOHM	16912
BDCD002520121R5MS1 Chilisin Electronics	FIXED IND 1.5UH 2.7A 70 MOHM SMD	5897
BWCS001207074N7H00 Chilisin Electronics	FIXED IND 4.7NH 640MA 130 MOHM	7900
BSPQ000603043N3B00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BMQADY1010404R7MA1 Chilisin Electronics	FIXED INDUCTOR 470NH SMD	800
BWCS00292821R18G00 Chilisin Electronics	FIXED IND 180NH 620MA 770 MOHM	4000
BWVS006060454R7ML1 Chilisin Electronics	FIXED IND 4.7UH 4A 30 MOHM SMD	1780
AWVS006060284R7M00 Chilisin Electronics	FIXED IND 4.7UH 3.2A 38 MOHM SMD	3000
APSC00060620100MS0 Chilisin Electronics	FIXED IND 10UH 124MOHM SMD	3000
BSCH000603033N3S00 Chilisin Electronics	FIXED IND 3.3NH 320MA 230 MOHM	27613
BDCD002016102R2MS1 Chilisin Electronics	FIXED IND 2.2UH 1.6A 204 MOHM	5623
BMRA000606306R8MA1 Chilisin Electronics	FIXED IND 6.8UH 4.5A 60 MOHM SMD	716
BWVS00606045101M00 Chilisin Electronics	FIXED IND 100UH 800MA 500 MOHM	922
BWVS005050206R8M00 Chilisin Electronics	FIXED IND 6.8UH 1.8A 90 MOHM SMD	3985
AWVS004040184R7M00 Chilisin Electronics	FIXED IND 4.7UH 1.7A 90 MOHM SMD	1600
BWCS001610087N5G00 Chilisin Electronics	FIXED IND 7.5NH 700MA 106 MOHM	3950
BSCH001005052N0SCP Chilisin Electronics	FIXED IND 2NH 400MA 100MOHM SMD	17032
BMRA000606302R2MA1 Chilisin Electronics	FIXED IND 2.2UH 8.5A 20 MOHM SMD	2807
BPSC000303204R7MHP Chilisin Electronics	FIXED IND 4.7UH 1.2A 140MOHM SMD	1978
BMRF00101040220MA1 Chilisin Electronics	FIXED IND 22UH 4.5A 64 MOHM SMD	965

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