General
Terminal type	Through-wiring clamp
Terminal body material	Hardened steel
Contact surface material	tin-plated copper
Connection technology	tension spring

The ZDU 2.5/3AN terminal block from Weidmüller is a through-conductor terminal block with busbar and tension spring, designed for secure and durable connection or joining of electrical conductors in industrial applications. The product is particularly suitable for use in enclosures, control systems, and other electrical installations where stable and reliable current connection is required. The terminal block enables the connection of multiple conductors in a row, with the tension spring ensuring a secure and durable connection, even under mechanical stress.

Applications

The ZDU 2.5/3AN is used in industrial electrical engineering where high mechanical stability and electrical reliability are essential. It is suitable for applications in automation technology, machine building, plant engineering, and electrical installation. The terminal block can be mounted in enclosures to connect multiple conductors in a row, with the tension spring ensuring a secure connection even under vibrations or mechanical loads.

Functions and Equipment in Detail

The terminal block features a busbar, enabling the connection of multiple conductors at a single point. The tension spring ensures that the contact between conductor and terminal block remains permanently stable, even when mechanical forces act on the system. The terminal block material consists of hardened steel, which withstands mechanical stresses during operation. The contact surface is made of tin-plated copper, ensuring optimal electrical conductivity and corrosion protection. The terminal block is designed for use in industrial environments where high demands are placed on the reliability and longevity of connections.

Technology Explained Simply

The tension spring in the terminal block ensures that the pressure on the connected conductor remains constant, regardless of thermal expansion or mechanical vibrations. This prevents loosening of the connection and ensures a lasting electrical contact. The tin-plated copper of the contact surface provides high conductivity and protects against oxidation, extending the service life of the connection. The hardened steel of the terminal block body provides additional strength and resists mechanical stresses that may occur in industrial operation.

Compatibility and Accessories

The ZDU 2.5/3AN is compatible with various accessories that enhance functionality and simplify installation. These include cross connectors such as ZQV 2.5/3, ZQV 2.5/50, ZQV 2.5/6, ZQV 2.5/7, ZQV 2.5/8, ZQV 2.5/10, which enable parallel connection of multiple terminal blocks. Test adapters such as ZTA 1 or ZTA 1/ZA support testing of connections. Reducer sleeves such as ZRH 2.5/1 WS or ZRH 2.5/2 GR/V0 allow adaptation to different conductor cross-sections. Rail holders such as ZEW 35, WEW 35/1, or WEW 35/2 are used to mount the terminal block on a mounting rail. Label carriers such as BZT 1 WS 10/5 or BZT 1 ZA WS 10/5, as well as markings such as ZS 10/5 MC NE WS, facilitate identification of connections. End and intermediate plates such as ZAP/TW 2 GN, ZAP/TW 2 OR, or ZAP/TW 2 DB serve for visual and mechanical separation of terminal block rows.

Mounting and Installation

The terminal block is mounted on a standard mounting rail (e.g. 35 mm), using rail holders or integrated fastening elements. The conductors are inserted into the terminal block and secured by the tension spring. Installation is performed using appropriate tools, such as a screwdriver suitable for the screws used. The connection is electrically effective immediately after installation and can be put into operation directly.

Advantages in Operation

The ZDU 2.5/3AN offers high mechanical stability and electrical reliability. The tension spring ensures a lasting contact, even under dynamic loads. The tin-plated copper ensures high conductivity and corrosion protection. The terminal block is easy to install and requires no additional tools for connection. Compatibility with various accessories allows flexible adaptation to different requirements in industrial use.