Terminals and terminal blocks for distribution boards

Choose terminals and terminal blocks for distribution boards by connection task, construction and exact series. Distinguish a terminal block, distribution block and accessory before comparing dimensions and designations.

Terminal block or distribution block

The range includes terminal blocks, tunnel terminals, distribution blocks and separate connection accessories. First choose the component's role in the specific distribution board. An end cap, label or connecting comb is not an entire terminal. Shared mounting on a DIN rail does not mean different constructions can replace one another either.

For a distribution block, specify the inputs and outputs, intended conductors and the individual specification of each connection. For a terminal block, compare the specific series and connection method. Do not transfer permitted material or cross-section from one port to all the others unless stated for the exact item.

Consider the system and cross-section together

The range includes screw and screwless construction designations and ranges such as TOPJOB S, SNK and Viking. Compare by full reference instead of housing colour alone. Colour design is separate from construction and electrical data. It does not establish compatibility with another series' accessories.

In the parameters, check permissible conductors, cross-sections and conditions for the chosen terminal. Distinguish cross-section from external housing width and nominal electrical values. Not every number in a name describes the cable. For replacement, keep the full old code and conductor data so the new item can be checked for the specific application.

Choose accessories for the same system

End elements, covers, markers and combs must be matched to the selected terminal series. Check which are included and which are separate items. A similar accessory shape is insufficient confirmation of compatibility. For the mechanical base, use DIN rails and mounting accessories.

If the task is supplying a row of devices with a comb busbar, continue to comb busbars. For the terminal ranges represented, you can browse WAGO and MOREK. The general distribution board assembly components section helps list terminals, accessories and mounting parts separately, without assuming that the entire required set is included with a single terminal.