Block 12450 (cosφ=0.5) VA, 4000 (Cosφ=1) VA Isolating Transformer, 380V ac, 400V ac, 420V ac Primary, 2 x 115V ac, Mounting Type: Fixing Rail, Length: 335mm, Dimensions: 240 x 335 x 165mm, Minimum Operating Frequency: 50Hz, Maximum Operating Frequency: 60Hz, Maximum Temperature: +40°C, MPN: TT1 4-4-23