The CTS2.5U-N/BU is 5mm width terminal block with dimensions 45 x 43 mm. Altech “U” Series Universal Rail CTS2.5U-N CTS4U-N Mounting Standard Screw Clamp Feed through terminals are the most versatile terminals for wire-to-wire connection in control, automation, instrumentation and power distribution applications. A special design feature on the flexible foot enables easy mounting and dismounting from the DIN Rail with the help of a screwdriver.