U-03 is a type of terminal block connector manufactured by TE Connectivity. It is a 3.5mm pitch terminal block connector for applications with low to medium current loads. It has a pitch of 3.5mm with a current rating of up to 17A and a voltage rating of up to 600V. The U-03 is available in two, three, four and five positions, and a range of colors, including black, blue, red, yellow, green and white. The U-03 is suitable for applications such as process and control, audio, and power supplies. It is also UL, CSA, and VDE approved.