Male and female mc4 connectors are single-contact electrical connectors commonly used for connecting solar panels. The MC in MC4 stands for the manufacturer Multi-Contact (currently Staubli Electrical Connectors) and the 4 for the 4mm diameter contact pin. MC4 connectors allow strings of panels to be easily constructed by pushing the connectors from adjacent panels together by hand, but require a tool to disconnect them to ensure they do not accidentally disconnect when the cables are pulled. The MC4 connectors and compatible products are universal in the solar market today, equipping almost all solar panels produced.Originally rated for 800V or 1000V, newer versions are rated at 1500 V, which allows longer strings to be created.
The MC4 connector consists of a plug and socket design. Oddly, the plugs and sockets are placed inside plastic shells that appear to be the opposite gender – the plug is inside a cylindrical shell that looks like a female connector but is referred to as male, and the socket is inside a square probe that looks male but is electrically female. The female connector has two plastic fingers that have to be pressed toward the central probe slightly to insert into holes in the front of the male connector. When the two are pushed together, the fingers slide down the holes until they reach a notch cut into the side of the male connector, where they pop outward to lock the two together.
Years ago, solar modules were built with a junction box on the back that required the installer to manually attach wires to the positive and negative terminal posts. This method is still used, but it’s slowly becoming a thing of the past. Modern solar modules tend to use the MC4 connectors because they make wiring your solar array much simpler and faster. The connectors come in both male and female types which are designed to snap together. They meet the requirements of the National Electric Code, they’re UL certified and the preferred connection method of electrical inspectors. Due to the locking mechanism of the MC4 connectors, they will not come unplugged and are well suited for outdoor environments. The connectors can be separated but it requires a special MC4 unlocking tool.
For a proper seal, MC4s require the usage of a cable with the correct diameter. Normally double-insulated (insulation plus black sheath) and UV resistant (most cables deteriorate if used outdoors without protection from sunlight). Connection is made by use of a special crimping tool, alternatively by soldering. You can read How to assemble MC4 connectors and MC4 wiring cables
Prostar > About Prostar
Prostar > Professional Team
Prostar > OEM and ODM Service
Prostar > Prostar Google Drive
|Rated Voltage||TUV 1000V DC / UL 600V DC|
|Rating Current||20A ～ 35A|
|Suitable Cable Cross Sections||2.5mm² ～ 6.0mm² / 14AWG ～ 10AWG|
|Proof Voltage||TUV 6000V AC(1Min) / UL 2200V DC(1 Min)|
|Protection Class||Class Ⅱ|
|Contact Material||Copper,Tin plated|
|Contact Resistance||≤ 5mΩ|
|Degree of Protection IP||IP67(IEC 60529)|
|Withdrawal Force||≥ 50N|
|Inserition Force||≤ 50N|
|Temperature Range||－40℃ ～ +85℃|