Magnets - Multi Purpose

Part Number	Description / PDF	Quantity
315-MAGNET Wickmann / Littelfuse	MAGNET 0.118"DIA X 0.590"H CYL	1236
H-33-MAGNET Wickmann / Littelfuse	MAGNET 0.125" SQ X 0.750"H RECT	8442
H-34-MAGNET Wickmann / Littelfuse	MAGNET 0.25" SQ X 1"H RECT	1295
H-36-MAGNET Wickmann / Littelfuse	MAGNET 0.182"DIA X 1"H CYL	653
625-MAGNET Wickmann / Littelfuse	MAGNET 0.236"DIA X 0.984"H CYL	654
H-31-MAGNET Wickmann / Littelfuse	MAGNET 0.063" SQ X 0.5"H RECT	6902
57030-000 Wickmann / Littelfuse	MAGNET ACTUATOR CYLINDRICAL	0
H-32-MAGNET Wickmann / Littelfuse	MAGNET 0.187" SQ X 1"H RECT	96
H-58-MAGNET Wickmann / Littelfuse	MAGNET 0.827 L X .276 W X .185 H	587
CM-1-MAGNET Wickmann / Littelfuse	MAGNET 0.5"DIA X 0.200"H CYL	254
420-MAGNET Wickmann / Littelfuse	MAGNET 0.157"DIA X 0.787"H CYL	751
H-41-MAGNET Wickmann / Littelfuse	MAGNET 0.75" L X 0.125" W RECT	0
57050-501 Wickmann / Littelfuse	MAGNET 0.9"L X 0.18"W CYL	0

Magnets - Multi Purpose

1. Overview

Magnets - Multi Purpose refer to a category of magnetic components designed for versatile applications beyond basic attraction/repulsion functions. These magnets integrate advanced materials and engineering to deliver precise magnetic fields, durability, and adaptability in modern technological systems. They play a critical role in automation, electronics, energy systems, and medical devices by enabling motion control, sensing, energy conversion, and data storage.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Permanent Magnets	Retain magnetism without external power; high energy density	Electric motors, generators, MRI machines
Electromagnets	Magnetic field generated by electric current; adjustable strength	Relays, magnetic separators, particle accelerators
Rare Earth Magnets	Exceptional strength-to-size ratio; temperature-resistant	Wind turbines, hard drives, sensors
Flexible Magnets	Elastomer-based materials with customizable shapes	Sealing systems, automotive sensors, consumer electronics

3. Structure and Composition

Typical configurations include:

Material Core: Rare earth alloys (NdFeB, SmCo), ferrites, or electromagnet coils
Coatings: Nickel-copper-nickel plating, epoxy resin, or polymer encapsulation for corrosion resistance
Mechanical Housing: Aluminum or steel casings for structural integrity
Mounting Features: Integrated threads, adhesive backing, or customized geometries

4. Key Technical Specifications

Parameter	Description	Importance
Magnetic Flux Density	Measured in Tesla (T); determines field strength	Impacts actuation force and sensor sensitivity
Coercivity	Resistance to demagnetization (kA/m)	Dictates operational stability in varying conditions
Max Operating Temperature	Thermal limit before performance degradation	Critical for high-temperature environments
Dimensional Tolerance	Precision in manufacturing ( 0.05mm typical)	Affects integration with mechanical systems

5. Application Fields

Industrial Automation: Proximity sensors, conveyor belt separators
Consumer Electronics: Smartphone speakers, wireless charging systems
Medical Devices: MRI scanners, implantable drug delivery systems
Renewable Energy: Direct-drive wind turbine generators
Transportation: EV traction motors, maglev train systems

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Arnold Magnetic Technologies	VACODYM Series	High-energy rare earth magnets for aerospace applications
Eclipse Magnetics	Precision Electromagnet Line	Customizable field control for industrial sorting systems
Hitachi Metals	Neomax NdFeB Magnets	45 MGOe energy product with thermal stability up to 200 C

7. Selection Guidelines

Determine required magnetic field strength and spatial constraints
Evaluate environmental conditions (temperature, humidity, vibration)
Assess cost-performance balance: Rare earth magnets offer superior performance but higher cost
Verify compliance with RoHS/REACH standards for material safety

8. Industry Trends

Key developments include:

Advancements in nanocomposite magnetic materials
Miniaturization for IoT sensor integration
Recycling technologies for rare earth elements
Smart magnets with embedded sensors and wireless communication

Case Study: Tesla's Model 3 permanent magnet motor achieved 97% efficiency using NdFeB magnets with proprietary corrosion-resistant coatings, demonstrating the critical role of advanced magnetic materials in EV technology.