Contacts are the conductive components within electrical systems that enable the flow of electricity between two points. They are fundamental in switches, relays, connectors, and other electrical devices. Contacts must be made from materials that have high conductivity and are resistant to corrosion and wear.
Different Types of Contacts
- Fixed Contacts: These are stationary and are often used in power sockets and stationary relays.
- Moving Contacts: Found in switches and circuit breakers, they can move to make or break an electrical connection.
Crucial Features and Benefits
- Ensures efficient current flow.
- Made from materials like copper, silver, or gold to resist wear and corrosion.
- Designed to ensure a secure fit and reliable connection.
Application Versatility
Contacts are utilised in a wide range of applications, including household light switches, automotive relays, industrial control systems, and electronic devices.
Spring Loaded (Pogo Pins)
Definition and Purpose
Spring-loaded pins, also known as pogo pins, are a type of electrical contact characterised by a spring mechanism that ensures constant pressure against the mating surface. This feature makes them perfect for applications requiring a reliable, repetitive connection.
Common Types
- Barrel Style: Standard design with a barrel, spring, and plunger.
- Serrated or Crown Style: Features a serrated or crown-shaped plunger for better surface contact.
Unique Features and Benefits
- Maintains a stable electrical connection even in environments with vibration or movement.
- High-quality materials and design for extended life cycles.
- Available in various sizes and force ratings to suit different applications.
Typical Applications of the Spring Loaded (Pogo Pins)
Generally used in test and measurement equipment, charging contacts for electronic devices, and in modular systems where frequent disconnection and reconnection are required.
Pressure Contacts
Pressure contacts rely on mechanical force to maintain an electrical connection. Unlike soldered or screwed connections, these are formed by pressing two conductive surfaces together, often with a clamping mechanism.
Popular Types of Pressure Contact
- Clamp Contacts: Use a screw or clamp to apply pressure.
- Leaf Spring Contacts: Utilise a leaf spring to maintain pressure.
Special Features Benefits
- No soldering or complex tools are required.
- Can be easily adjusted or disconnected.
- Offers a secure connection without the risk of cold solder joints.
Application Potential
Pressure contacts find use in battery terminals, modular electronic components, and in applications where quick and easy assembly or disassembly is beneficial.
