It's a 4 Pin Female Plug-in Screw Terminal Block Connector. This PCB Connector can handle AC 250V 10A. The 4 Pin 5mm pitch Pluggable type PCB terminal block is a type of electronic component that provides a secure and reliable way to connect wires to printed circuit boards (PCBs). 

Features 

• Material: Plastic
• Connector Type: Female Screw Terminal, Plug-in
• number of Pins: 4
• Pitch: 5.08mm
• Colour: Green
• Wire: 28-12AWG