Relay Socket : What is it?
| Relay sockets are connectors that accept electromechanical switches called relays, where one circuit uses variations in current to regulate the flow of electricity in another. They usually consist of a flat board with a number of terminals for accepting standard relay pins. Relay sockets can have five to 16 pins per blade and fit one- to five-pole plugs. Most relay sockets are made from heat-stabilized thermoplastic, which helps them withstand high-temperature applications. |
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Kinds of Relay Sockets include the following: |
Industrial relay sockets
These relay sockets are installed on panel mounts, printed circuit boards (PCBs), or DIN rail mounts. DIN rail and panel mount sockets are usually available in open frame and finger-safe European designs. They are also used in PC circuitry and applications that require solder wiring or quick-disconnect wiring.
PCB sockets
These sockets are specifically designed for PCBs, which are installed on computers and other chip-controlled devices. They are mounted to the PCB either by pushing the leads through pre-made holes or soldering them to the surface. Some models also have mounting holes that fit into specific board or panels.
Automotive relay sockets
Automotive relay sockets are commonly used in specialized circuit boards and switching and wiring applications. They are also available in PC-mount versions. They usually come in 70-ampere ratings and can accept mini, micro, and power relays. There are different pin configurations, but four-pin and five-pin sockets are the most common. |
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Casing: Choose a relay socket with a break-resistant thermoplastic case for external applications. This will protect it against impact, falls, or bumping against other components or devices. For internal applications, such as PC motherboards, choose a heat-resistant casing to protect it from heat damage.
PCB mounting: If you are buying a PCB or industrial socket, make sure the socket fits over the PCB slot and has the appropriate pin configuration. Choose a through-the-hole (THT) mounted socket over surface-mount (SMT) because they are more stable and permanent. If you will be mounting the socket yourself, look for one with mounting holes for easier installation.
UL certification: Make sure your relay socket meets the Underwriters Laboratory (UL) quality standards. This means that the product satisfies international standards for quality and performance. UL certification is usually indicated on the package with an approval seal. |
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