General
Terminal type	Through-wiring clamp
Connection type	Screw connection
Material	Hardened steel, tin-coated copper
Conductor cross section	120 qmm

The WDU 95N/120N terminal block from Weidmüller is a passage terminal block designed for use in industrial electrical installations. It is used for connecting or joining conductors and ensures a permanently secure electrical contact. The terminal block is designed for use in switchgear and distributors, where a stable and reliable connection of cables is required. The construction from hardened steel ensures high mechanical strength and resistance to operational stresses. The contact surfaces are made of tin-plated copper, providing optimal electrical conductivity and corrosion protection.

Terminal block

The terminal block is designed as a terminal block, meaning it is mounted in a row on a mounting rail. This enables compact and structured cabling, particularly in enclosures and distributors. The row mounting facilitates maintenance and clarity of the installation, as multiple terminals are arranged in a line, allowing for clear assignment of conductors.

Functions and equipment in detail

The terminal block features a screw connection, enabling secure fastening of the conductors. The connection is made by screw force, which holds the conductor firmly in the terminal and ensures a stable electrical contact. The materials – hardened steel and tin-plated copper – are specifically selected to meet both mechanical and electrical requirements. The tin plating protects the copper from oxidation and ensures long-term stable conductivity.

Technology explained simply

The terminal block operates on the principle of a screw terminal: the conductor is inserted into the connection area and held firmly by tightening the screw. The screw force generates pressure that presses the conductor against the contact surface, creating an electrical connection. The use of hardened steel ensures that the terminal maintains its shape even under high mechanical stress and does not deform. The tin-plated copper provides high electrical conductivity and is resistant to environmental influences such as moisture or humidity.

Compatibility and accessories

The WDU 95N/120N is compatible with various accessories that extend functionality and customization options. These include, for example, additional connections (WZAD 95N/120N), cross connectors for multiple terminals (WQV 95N/120N/2, /3, /4), covers (WAD 20 GE WSD), labeling carriers (BZT 1 WS 10/5, BZT 1 ZA WS 10/5) as well as terminal markings (DEK 5/8 MM WS, WS 15/5 MC NE WS, DEK 5/8 MC NE WS). These components allow individual adaptation of the terminal to specific requirements, such as labeling conductors or connecting multiple terminals in a row.

Mounting and installation

Mounting is done on a standard DIN rail, commonly used in enclosures and distributors. The terminal block is simply clipped onto the rail and secured by an integrated holding mechanism. Installation of the conductors is done by inserting the conductor into the connection area and then tightening the screw.

Advantages in operation

The terminal block offers high reliability in continuous operation, especially in industrial environments with high mechanical and electrical loads. The material combination of hardened steel and tin-plated copper ensures a long service life and minimizes the risk of contact loss. The row mounting enables structured and clear cabling, which simplifies maintenance and fault diagnosis. Compatibility with various accessories extends application possibilities and allows flexible adaptation to different requirements.