This is a 20 ampere 600 volt rated 3-pole terminal block used with DIN rails.
SPECIFICATIONS
No. of Poles: 3
Rated Voltage: 600V
Rated Current: 20A
Dielectric Strength: 2500V/min
Insulation Resistance: 100MΩ
Applicable Wire: 2mm² MAX
Applicable Screw: M3.5