Wago 281-637 Ground Terminal Block Green Yellow 3-Conductor 4 mm

The Wago 281-637 ground terminal block in green and yellow is engineered for secure and reliable electrical wire connections in various professional applications. Featuring a 3-conductor design and a 4 mm capacity, this protective earth terminal serves as an essential component for electrical installations, control panels, and distribution boards. It provides safe grounding and helps maintain efficient circuit organization within complex wiring systems. Built with precision dimensions of 6 mm width, 61.5 mm depth, and 37 mm height, it integrates seamlessly into standard rail-mounted assemblies.

Advantages

This ground terminal block offers robust mechanical stability and secure electrical contact, ensuring long-term reliability under continuous operational demands. The clear green and yellow color coding allows for immediate identification of the protective earth conductor, enhancing safety and compliance during installation and maintenance procedures. Its compact profile optimizes space on mounting rails while accommodating reliable three-wire connections for efficient distribution of grounding potentials.

Suitable for

• Professional electrical installations
• Control panels and switchgear manufacturing
• Distribution boards and sub-distribution units
• Industrial automation and machinery wiring

When it may not be suitable

This terminal block is not designed for direct connection to uninsulated live conductors carrying phase or neutral current, as it is strictly intended for protective earth applications. It may also not be suitable for wire cross-sections significantly exceeding the specified 4 mm capacity without appropriate adaptation.

Key specifications

• 3-conductor design
• 4 mm capacity
• Green and yellow protective earth coloring
• Width: 6 mm
• Depth: 61.5 mm
• Height: 37 mm

How to use

To use the Wago 281-637 ground terminal block, secure it firmly onto a compatible mounting rail within your enclosure or distribution board. Strip the appropriate length of insulation from the electrical conductors to expose the bare wire. Insert the stripped wires into the designated conductor entry points of the terminal block until they are fully seated and securely clamped, ensuring a reliable mechanical and electrical connection to the protective earth system.

What to consider before purchase

• Verify that the 4 mm wire capacity matches your specific conductor requirements
• Ensure compatibility with your existing mounting rail system
• Confirm that the green and yellow color scheme meets your local electrical identification standards

Usage recommendations: Always isolate the power supply before installing or servicing any electrical components, and ensure that all wire connections are properly secured and tested according to relevant electrical safety codes.