Terminals are the pins in a connector which provide electrical conduction to make the connections secure. They are almost always composed of a metal, but some of them use other conductive materials (carbon, silicon, etc.).

A three pin plug has 3 pins, the top, left and right pins. The top pin is for making the connection to the earth wire(which is usually the first to make contact as u inset the plug into a socket because of its length), the right is for making the connection to the live wire and the left pin for connection to the neutral wire.

The term contact resistance refers to the contribution to the total resistance of a system which can be attributed to the contacting interfaces of electrical leads and connections as opposed to the intrinsic resistance, which is an inherent property, independent of the measurement method.

Instantaneous current is the amount of charge passing through a conductor at the moment.

Voltage Ratings discusses the differences between AC and DC volts as well as Peak vs. RMS.

Power/Current Ratings provides test and measurement details as well as the basic theory surrounding current rating procedures and techniques.  AC vs DC and Peak vs. RMS are analyzed with regard to current.

The operating temperature range describes the range, recommended temperature and minimum/maximum safe operating temperature for the electrical connector. 

Insulation material is any material that inhibits the transmission of heat, noise or electric current.

Material like PVC, glass, asbestos, rigid laminate, varnish, resin, paper, Teflon, and rubber are very good electrical insulators. Insulating material is used as a protective coating on electrical wire and cables. The most significant insulating material is air.

UL is the abbreviation for the Underwriters Laboratories, this is an independent organisation in the United States to control and certificate product safety. UL provide safety related certification, validation, inspection and testing services to a range of clients including manufacturers, retailers, policy makers and regulators.

UL-94 is the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances. Within this standard, materials are subjected to various burning tests to see their performance in flammable conditions.

CE marking is a certification mark that indicates conformity with health, safety, and environmental protection standards for products sold within the European Economic Area (EEA). The CE marking is also found on products sold outside the EEA that are manufactured in, or designed to be sold in, the EEA.

Copper coatings are also commonly used in corrosion protection. It is a relatively soft metal that offers high thermal conductivity. Copper can also be used as an underplate for other metals in the electroplating process. A coating of copper will enhance the electrical properties of the other metals and increase the corrosion resistance of the deposit

Gold plating is often used in electronics, to provide a corrosion-resistant electrically conductive layer on copper, typically in electrical connectors and printed circuit boards.

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Wire gauge is a measurement of a wire, either its diameter or cross-sectional area. The gauge of a wire determines how much current can flow through the wire. The gauge also determines the resistance of the wire and its weight per unit of length.

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The main battery connector is both the mechanical and electrical part that have plugged your battery in by plugging/snapping in the main battery connector to Pin orientation within the connector has to be designed in order to fit the device.

·      Connector is a device to connect different power system components together in order to allow an electric RC model to function properly. But there is more to it than just connecting components together because that can be done without connectors.

A connector type with pins instead of holes. These connectors are inserted into a female connector. Good examples of male connectors are power plug and coaxial cables.

The "female" connector is generally a receptacle that receives and holds the "male" connector.