Fixed Inductors

Part Number	Description / PDF	Quantity
BDHE002520102R2MQ1 Chilisin Electronics	FIXED IND 2.2UH 2.5A 97 MOHM SMD	5260
BWCS00231715R12G00 Chilisin Electronics	FIXED IND 120NH 400MA 510 MOHM	3932
BWCS0023171556NG00 Chilisin Electronics	FIXED IND 56NH 500MA 340MOHM SMD	4000
BEBE00141208R24MMA Chilisin Electronics	INDUCTOR, PWR	0
BPSC00101140100M00 Chilisin Electronics	FIXED IND 10UH 40MOHM SMD	1993
BSCH001608082N2S00 Chilisin Electronics	FIXED IND 2.2NH 600MA 100 MOHM	7865
BDCD002520121R0MS1 Chilisin Electronics	FIXED IND 1UH 3.5A 59 MOHM SMD	10359
BSCH001608085N6S00 Chilisin Electronics	FIXED IND 5.6NH 600MA 180 MOHM	15972
BSCH0006030322NJ00 Chilisin Electronics	FIXED IND 22NH 150MA 1OHM SMD	28782
BWVF004040262R2M00 Chilisin Electronics	FIXED IND 2.2UH 3.5A 45 MOHM SMD	688
BWCS00231715R56G00 Chilisin Electronics	FIXED IND 560NH 230MA 1.9OHM SMD	4000
BSCH000603035N1S00 Chilisin Electronics	FIXED IND 5.1NH 270MA 330 MOHM	28836
BSCQ000603032N0B00 Chilisin Electronics	FIXED IND 2NH 600MA 150MOHM SMD	14953
BWVS00606045100ML1 Chilisin Electronics	FIXED IND 10UH 3.2A 50 MOHM SMD	1692
BWCS001207076N8H00 Chilisin Electronics	FIXED IND 6.8NH 680MA 83MOHM SMD	7683
BSCH0010050518NJCP Chilisin Electronics	FIXED IND 18NH 300MA 360MOHM SMD	868
BWVS00404018101M00 Chilisin Electronics	FIXED IND 100UH 380MA 1.5 OHM	1590
HEI252012A-R10N-Q8DH Chilisin Electronics	FIXED INDUCTOR 100NH SMD	5992
BWCS0012070722NG00 Chilisin Electronics	FIXED IND 22NH 400MA 300MOHM SMD	7993
BSCH0016080839NJ00 Chilisin Electronics	FIXED IND 39NH 400MA 600MOHM SMD	10786

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