Fixed Inductors

Part Number	Description / PDF	Quantity
DSH-22-0006 Schurter	FIXED INDUCTOR 3.15A 33 MOHM TH	50
DLH-31-0008 Schurter	FIXED IND 50UH 6.3A 23 MOHM TH	0
DLH-31-0001 Schurter	FIXED IND 5.5MH 600MA 3.6 OHM TH	44
DLO1-24-0003 Schurter	FIXED INDUCTOR 3A 70 MOHM TH	210
DLO1-24-0006 Schurter	FIXED INDUCTOR 1A 600 MOHM TH	0
DSH-22-0002 Schurter	FIXED IND 630MA 750 MOHM TH	40
DLH-22-0007 Schurter	FIXED IND 50UH 4.5A 30 MOHM TH	178
DLH-14-0003 Schurter	FIXED IND 50UH 2A 50 MOHM TH	89
DEN-25-0001 Schurter	FIXED IND 16A 27 MOHM CHASSIS	8450
DSH-22-0005 Schurter	FIXED INDUCTOR 1.8A 90 MOHM TH	100
DENO-23-0001 Schurter	FIXED INDUCTOR 16A 15 MOHM TH	747200
DSH-14-0003 Schurter	FIXED INDUCTOR 2A 25 MOHM TH	0
DLH-22-0002 Schurter	FIXED IND 3MH 600MA 1.55 OHM TH	5
DLH-22-0004 Schurter	FIXED IND 500UH 1.5A 280 MOHM TH	92
DSH-14-0002 Schurter	FIXED INDUCTOR 1A 100 MOHM TH	0
DLO1-24-0004 Schurter	FIXED INDUCTOR 1.8A 178 MOHM TH	200
DFSG-33-0001 Schurter	FIXED INDUCTOR 5A 70 MOHM TH	28
DLH-31-0003 Schurter	FIXED IND 800UH 1.6A 470 MOHM TH	63
DFSG-33-0002 Schurter	FIXED INDUCTOR 10A 30 MOHM TH	29
DFSG-20-0001 Schurter	FIXED INDUCTOR 800MA 1.3 OHM TH	156

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