ABB S201UK4 Miniature Circuit Breaker 4 Amp Single Pole

ABB S201UK4 Miniature Circuit Breaker is a 1-pole, 4 A device that automatically interrupts electrical supply to protect a circuit from overloads or short circuits. It belongs to ABB’s S200/S201 family and is designed for standard distribution panels in European-style installations. This unit is paired with the S2C-H6RU auxiliary contact, a field-mountable right-side accessory configured as 1NO 1NC to provide a signaling contact for control circuits or interlocking. The S2C-H6RU accessory measures about 100 mm high, 8.8 mm wide, and 69 mm deep, and is intended for use with S200U, S200UP, SU200PR, and S200UDC breakers, enabling remote status indication or interlock schemes in panelboards. In typical applications, the 4 A MCB protects small branch circuits such as lighting, sockets, or low-power devices within a distribution board, while the auxiliary contact can feed back to a control system to indicate when the breaker is tripped or ON.