Fixed Inductors

Part Number	Description / PDF	Quantity
BWVF003030102R2M00 Chilisin Electronics	FIXED IND 2.2UH 1.4A 100 MOHM	3743
BWVH002520102R2MH1 Chilisin Electronics	FIXED IND 2.2UH 1.4A 135 MOHM	3994
BSCH000603031N0S00 Chilisin Electronics	FIXED IND 1NH 470MA 110MOHM SMD	19798
BWCS0023171582NG00 Chilisin Electronics	FIXED IND 82NH 400MA 420MOHM SMD	4000
BSCQ0006030322NH00 Chilisin Electronics	FIXED IND 22NH 190MA 1.29OHM SMD	29890
BWVS005050402R2M00 Chilisin Electronics	FIXED IND 2.2UH 3.7A 21 MOHM SMD	1222
BWVS006060456R8M00 Chilisin Electronics	FIXED IND 6.8UH 3.2A 43 MOHM SMD	1951
BWCS0023171568NG00 Chilisin Electronics	FIXED IND 68NH 500MA 380MOHM SMD	3750
BSPQ000603043N6B00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BSCH001005054N3SCP Chilisin Electronics	FIXED IND 4.3NH 400MA 180 MOHM	18911
BSCH0010050582NJCP Chilisin Electronics	FIXED IND 82NH 150MA 1.2OHM SMD	19942
BSCH001608081N8S00 Chilisin Electronics	FIXED IND 1.8NH 600MA 100 MOHM	0
BWVS008080402R2M00 Chilisin Electronics	FIXED IND 2.2UH 7.2A 11.5 MOHM	1602
BSCQ000603034N7C00 Chilisin Electronics	FIXED IND 4.7NH 350MA 420 MOHM	28528
BDHE002016102R2MQ1 Chilisin Electronics	FIXED IND 2.2UH 2.2A 135 MOHM	5240
BSPQ000603045N1H00 Chilisin Electronics	THIN FILM RF INDUCTOR,HIGH Q	0
BMRF00101040100MA1 Chilisin Electronics	FIXED IND 10UH 6.5A 30 MOHM SMD	749
AWVS00505040220M00 Chilisin Electronics	FIXED IND 22UH 1.4A 135 MOHM SMD	2825
BSCH001005053N3SCP Chilisin Electronics	FIXED IND 3.3NH 400MA 150 MOHM	17356
BWCS001207073N9H00 Chilisin Electronics	FIXED IND 3.9NH 840MA 66MOHM SMD	3805

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