Fixed Inductors

Part Number	Description / PDF	Quantity
BDHE002520101R0MQ1 Chilisin Electronics	FIXED IND 1UH 3.5A 53 MOHM SMD	0
BMRA000606301R0MA1 Chilisin Electronics	FIXED IND 1UH 12A 10 MOHM SMD	2583
BSCQ000603032N4B00 Chilisin Electronics	FIXED IND 2.4NH 430MA 260 MOHM	14432
BWCS0016100839NG00 Chilisin Electronics	FIXED IND 39NH 600MA 250MOHM SMD	0
BMRA000404204R7MA1 Chilisin Electronics	FIXED IND 4.7UH 2.2A 126 MOHM	3992
AWVS00808040330M00 Chilisin Electronics	FIXED IND 33UH 2A 110 MOHM SMD	997
BWVS00808040150M00 Chilisin Electronics	FIXED IND 15UH 3.2A 50 MOHM SMD	0
BWCS0016100847NG00 Chilisin Electronics	FIXED IND 47NH 600MA 280MOHM SMD	0
BWCS0016100818NG00 Chilisin Electronics	FIXED IND 18NH 700MA 170MOHM SMD	51975
BKPB002520102R2MA2 Chilisin Electronics	FIXED IND 2.2UH 1.2A 100MOHM SMD	6000
BSCH001005056N2JCP Chilisin Electronics	FIXED IND 6.2NH 400MA 220 MOHM	19596
BWCS002928212R2G00 Chilisin Electronics	FIXED IND 2.2UH 280MA 2.8OHM SMD	3968
BWVS00505040150M00 Chilisin Electronics	FIXED IND 15UH 1.8A 90 MOHM SMD	2140
BSCH00100505R22JCS Chilisin Electronics	FIXED IND 220NH 100MA 4.2OHM SMD	19840
BPSC00101140330M00 Chilisin Electronics	FIXED IND 33UH 98MOHM SMD	5980
BDCD00252012R47MS1 Chilisin Electronics	FIXED IND 470NH 4.4A 39 MOHM SMD	5845
BWVS004040181R0M00 Chilisin Electronics	FIXED IND 1UH 2.8A 32 MOHM SMD	1395
BSCH00160808R22J00 Chilisin Electronics	FIXED IND 220NH 250MA 2OHM SMD	6715
BPSD000605304R7K00 Chilisin Electronics	FIXED IND 4.7UH 70MOHM SMD	3985
BMRF001010406R8MA1 Chilisin Electronics	FIXED IND 6.8UH 6A 25 MOHM SMD	927

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