Fixed Inductors

Image	Part Number	Description / PDF	Quantity	Rfq
	1530B153 Hammond Manufacturing	FIXED IND 1.5MH 63MA 37.2 OHM TH	0
	1530B395 Hammond Manufacturing	FIXED IND 39UH 188MA 3.36 OHM TH	0
	1530B335 Hammond Manufacturing	FIXED IND 33UH 208MA 2.76 OHM TH	0
	1531R Hammond Manufacturing	FIXED IND 10UH 500MA 1.5 OHM TH	0
	1530B684 Hammond Manufacturing	FIXED IND 680UH 87MA 19.8 OHM TH	0
	1533H Hammond Manufacturing	FIXED IND 1MH 160MA 19 OHM TH	0
	1530B686 Hammond Manufacturing	FIXED IND 6.8UH 566MA 624 MOHM	0
	1530B103 Hammond Manufacturing	FIXED IND 1MH 79MA 24 OHM TH	0
	1536TA Hammond Manufacturing	FIXED IND 100UH 1A 550 MOHM TH	0
	1530C333 Hammond Manufacturing	FIXED IND 3.3MH 53MA 51.6 OHM TH	0
	1530B474 Hammond Manufacturing	FIXED IND 470UH 95MA 16.3 OHM TH	0
	1530B154 Hammond Manufacturing	FIXED IND 150UH 135MA 8.16 OHM	0
	1530B824 Hammond Manufacturing	FIXED IND 820UH 80MA 22.9 OHM TH	0
	1530C182 Hammond Manufacturing	FIXED IND 18MH 44MA 128 OHM TH	0
	1530B106 Hammond Manufacturing	FIXED IND 1UH 2.041A 48 MOHM TH	0
	622S Hammond Manufacturing	FIXED IND 47MH 13.7MA 27 OHM TH	0
	1530D332 Hammond Manufacturing	FIXED IND 33MH 43MA 134 OHM TH	0
	1530B223 Hammond Manufacturing	FIXED IND 2.2MH 57MA 45.6 OHM TH	0
	1530D101 Hammond Manufacturing	FIXED IND 100MH 29MA 278 OHM TH	0
	1530B566 Hammond Manufacturing	FIXED IND 5.6UH 637MA 492 MOHM	0

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