Fixed Inductors

Part Number	Description / PDF	Quantity
BPSD00060545101K00 Chilisin Electronics	FIXED IND 100UH 700MOHM SMD	2920
AWVS00606028220M00 Chilisin Electronics	FIXED IND 22UH 1.5A 135 MOHM SMD	2942
BSCH00160808R15J00 Chilisin Electronics	FIXED IND 150NH 250MA 1.7OHM SMD	7920
BSPQ000603044N3H00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BSCH0010050568NJCP Chilisin Electronics	FIXED IND 68NH 180MA 920MOHM SMD	19917
BWVF003030154R7M00 Chilisin Electronics	FIXED IND 4.7UH 1.52A 170 MOHM	0
BSCH000603034N7S00 Chilisin Electronics	FIXED IND 4.7NH 280MA 300 MOHM	29052
APSC00101140220M00 Chilisin Electronics	FIXED IND 22UH 80MOHM SMD	1998
BMRA00040420R47MA1 Chilisin Electronics	FIXED IND 470NH 7A 14 MOHM SMD	3885
BSCH000603031N8S00 Chilisin Electronics	FIXED IND 1.8NH 390MA 160 MOHM	27490
BSPQ000603043N9B00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
AMRU00060630100MA1 Chilisin Electronics	FIXED IND 10UH 4A 68 MOHM SMD	2122
BWCS0012070718NG00 Chilisin Electronics	FIXED IND 18NH 420MA 230MOHM SMD	7972
BSCH001005053N0SCP Chilisin Electronics	FIXED IND 3NH 400MA 150MOHM SMD	19932
BWCS0016100815NG00 Chilisin Electronics	FIXED IND 15NH 700MA 170MOHM SMD	3798
BWCS0016100856NG00 Chilisin Electronics	FIXED IND 56NH 600MA 310MOHM SMD	7694
BSCQ000603033N0B00 Chilisin Electronics	FIXED IND 3NH 460MA 240MOHM SMD	29972
BMRB000606184R7MA1 Chilisin Electronics	FIXED IND 4.7UH 3.5A 70 MOHM SMD	1896
BSCQ0006030310NH00 Chilisin Electronics	FIXED IND 10NH 230MA 850MOHM SMD	14122
BSCQ000603033N3B00 Chilisin Electronics	FIXED IND 3.3NH 415MA 280 MOHM	17250

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