1SDA066744R1

ABB 1SDA066744R1 is an A1B Formula series 125A, 4-pole moulded case circuit breaker (MCCB) with a fixed thermal-magnetic (TMF) release. It is designed for overload and short-circuit protection in low-voltage electrical distribution systems. The breaker has a fixed mounting configuration with front terminals, making it suitable for distribution panels, switchboards and industrial electrical installations. The TMF release provides fixed thermal and magnetic protection, with a current range specified as 125–1250A. ABB specifies IEC certification and a 25kA interruption rating for this catalog configuration.