Wago din rail terminal blocks spring cage 42mm 18a wago 2001 1304 the wago din rail terminal block spring cage 42mm 18a blue is a 3 conductor through terminal block suitable for exe applications the cage clampreg connection technique allows stripped solid and ferruled conductors to be pushed in with their space saving design the terminal block is up to 30 smaller than standard terminal block and with a conductor entry angle of less than 15deg which allows easier installation in sma