Fixed Inductors

Part Number	Description / PDF	Quantity
BKPB001608DZ1R0MA2 Chilisin Electronics	FIXED IND 1UH 950MA 200MOHM SMD	7101
BSPQ000603042N0B00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BDCD003225121R0MS1 Chilisin Electronics	FIXED IND 1UH 4.2A 42 MOHM SMD	5739
BSCH0016080822NJ00 Chilisin Electronics	FIXED IND 22NH 500MA 400MOHM SMD	3654
BWCS001207073N3H00 Chilisin Electronics	FIXED IND 3.3NH 840MA 66MOHM SMD	11980
BMRA000404201R0MA1 Chilisin Electronics	FIXED IND 1UH 4.5A 27 MOHM SMD	4000
BMRF001010402R2MD1 Chilisin Electronics	FIXED IND 2.2UH 14A 7 MOHM SMD	986
BPSC00131380101M00 Chilisin Electronics	FIXED IND 100UH 170MOHM SMD	393
BSPQ000603041N5B00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BSCH001005053N6SCP Chilisin Electronics	FIXED IND 3.6NH 400MA 150 MOHM	19821
BWCS00231715R68G00 Chilisin Electronics	FIXED IND 680NH 190MA 2.2OHM SMD	4000
BPSC00131380100M00 Chilisin Electronics	FIXED IND 10UH 22MOHM SMD	882
BSCH0016080815NJ00 Chilisin Electronics	FIXED IND 15NH 600MA 320MOHM SMD	6995
BWVS00606045150M00 Chilisin Electronics	FIXED IND 15UH 2.2A 80 MOHM SMD	1728
BWVS004040183R3M00 Chilisin Electronics	FIXED IND 3.3UH 2.1A 70 MOHM SMD	1480
BSCH001005055N6SCP Chilisin Electronics	FIXED IND 5.6NH 400MA 200 MOHM	19462
BSCH0010050510NJCP Chilisin Electronics	FIXED IND 10NH 300MA 260MOHM SMD	9672
BWVS00404018220M00 Chilisin Electronics	FIXED IND 22UH 850MA 350 MOHM	1445
BSCH000603033N0S00 Chilisin Electronics	FIXED IND 3NH 330MA 220MOHM SMD	29963
BMRA000404201R5MA1 Chilisin Electronics	FIXED IND 1.5UH 4A 46 MOHM SMD	3990

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