Wago claims to have developed the industry`s most compact rail-mounted terminal block. The device supports two potentials within its 3.5mm width.

The terminal block (above), part of the company’s 2000 Series of Tobjob S blocks, accommodates conductors from 0.14–1.5mm². Jumpers allow both potentials to be commoned with adjacent terminal blocks. Circuit inputs and outputs are on the same side of the terminal block. Colour coding allows both circuits to be identified easily.