General
Terminal type	2-wire pass-through terminal
Conductor cross section	0,08 - 4 mm²
Text	Centrical
Colour	Grey
Mounting method	Support rail
Connection technology	CAGE CLAMP®

The WAGO 281-901 is a 2-conductor pass-through terminal block designed for use in industrial electrical installations. It enables secure and reliable connection of two conductors with a cross-section of 0.08 to 4 mm². The terminal block is finished in grey and features central labelling, allowing for clear identification of connection points. It is designed for mounting on support rails with dimensions 35 x 15 mm and 35 x 7.5 mm, ensuring universal use in various enclosures and control systems. The connection technology is based on the CAGE CLAMP® system, which allows for quick and secure conductor fixation without additional tools.

Applications
This terminal block is suitable for applications in industrial electrical engineering, particularly in control and enclosure systems. It is commonly used in automation technology, for wiring drives, sensors, contactors, and in building automation. Its compatibility with standard support rails makes it suitable for a wide range of enclosure components and allows modular expansion of the system.

Functions and Features in Detail
The 2-conductor pass-through terminal block 281-901 connects two conductors at a single connection point, with current flowing through the terminal block. The central labelling facilitates identification of connections, especially in complex wiring setups. The CAGE CLAMP® system ensures a secure and durable connection, as conductors are clamped in place by a pressure mechanism. The terminal block is rated for conductor cross-sections from 0.08 to 4 mm², covering a wide range of cable types, from fine control wires to heavier power supply cables.

Technology Explained Simply
The CAGE CLAMP® system operates without screws or additional tools. During installation, the conductor is inserted into the terminal block and securely clamped by a pressure mechanism. This ensures a stable electrical connection and minimizes the risk of contact loss. The terminal block is designed for mounting on support rails with dimensions 35 x 15 mm and 35 x 7.5 mm, enabling universal use in standard enclosures. The grey colour is standard for electrical components in industrial applications and supports visual differentiation of components.

Compatibility and Accessories
The terminal block is compatible with various accessories that extend its functionality. These include bridging clips such as the 281-482 (2-way insulated) or 281-483 (3-way insulated), which enable electrical connections between multiple terminals. Test adapters like the 209-170 or L-test plug module 249-144 support maintenance and diagnostics. Labelling systems such as the WMB system (e.g. 793-501/000-005) allow individual identification of connections. The terminal block can also be combined with blanking modules (e.g. 281-419) to close unused positions in the enclosure.

Installation and Mounting
Mounting is done by simply snapping the terminal block onto the support rail. The terminal block is designed for standard support rails 35 x 15 mm and 35 x 7.5 mm, enabling universal use in various enclosure configurations. Conductor connection is achieved via the CAGE CLAMP® system: the conductor is inserted into the terminal block and securely clamped by a pressure mechanism. No special tools are required, as the system operates tool-free.

Operational Advantages
The terminal block provides quick and secure tool-free connections, reducing installation time. The central labelling simplifies identification of connections, making maintenance and troubleshooting easier. Compatibility with various accessories such as bridging clips and labelling systems allows flexible adaptation to specific requirements. Use on standard support rails ensures easy integration into existing enclosure systems.