Fixed Inductors

Part Number	Description / PDF	Quantity
BEBE00141208R47MMA Chilisin Electronics	INDUCTOR, PWR	0
BPSD000504322R2K00 Chilisin Electronics	FIXED IND 2.2UH 47MOHM SMD	3979
BWCS001207072N7B00 Chilisin Electronics	FIXED IND 2.7NH 640MA 120 MOHM	7754
BSCH000603031N5S00 Chilisin Electronics	FIXED IND 1.5NH 430MA 130 MOHM	23912
BSPQ0006030412NH00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BSCH00100505R10JCS Chilisin Electronics	FIXED IND 100NH 100MA 2OHM SMD	19790
BSCH001005051N0SCP Chilisin Electronics	FIXED IND 1NH 400MA 70 MOHM SMD	3049
BWVS00606045100M00 Chilisin Electronics	FIXED IND 10UH 2.7A 57 MOHM SMD	1955
BWVF00303012220M00 Chilisin Electronics	FIXED IND 22UH 620MA 860 MOHM	3945
BWCS001207078N2H00 Chilisin Electronics	FIXED IND 8.2NH 680MA 100 MOHM	7821
BSCH000603032N4S00 Chilisin Electronics	FIXED IND 2.4NH 350MA 200 MOHM	14982
BSCH0006030315NJ00 Chilisin Electronics	FIXED IND 15NH 180MA 710MOHM SMD	8805
BWVS00404018100M00 Chilisin Electronics	FIXED IND 10UH 1.2A 170 MOHM SMD	488
BWVF003030151R0M00 Chilisin Electronics	FIXED IND 1UH 3A 54 MOHM SMD	9864
BMRA00060630R22MA1 Chilisin Electronics	FIXED IND 220NH 23A 2.8 MOHM SMD	1994
BDHE002520121R5MQ1 Chilisin Electronics	FIXED IND 1.5UH 3.1A 65 MOHM SMD	5924
BSCQ0006030318NH00 Chilisin Electronics	FIXED IND 18NH 205MA 1.05OHM SMD	29394
BWCS0023171547NG00 Chilisin Electronics	FIXED IND 47NH 500MA 310MOHM SMD	3990
ASCH001005055N6SCP Chilisin Electronics	FIXED IND 5.6NH 400MA 200 MOHM	20000
BWCS00161008R33G00 Chilisin Electronics	FIXED IND 330NH 100MA 3.89 OHM	7620

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