05.002.3421.0 is part of the Wieland product range, which includes a variety of electrical connection products, such as terminal blocks and relay sockets. This particular part is a Clippon, which is a type of terminal block. It is a 3-way, 280V rated terminal block with a 9mm channel width, a 5mm pitch, a wire size range of 0.14-2.5mm², and a cross-section size range of 28-6mm². It is UL, CSA, and VDE listed, making it suitable for use in various industrial and commercial applications.