ABB NSB S803S-B63 Din Rail Mounted Circuit Breaker

ABB S803S-B63 is a 3-pole High Performance molded-case circuit breaker (MCB) from ABB’s NSB family, catalogued as 2CCS863001R0635, engineered for direct DIN rail mounting in industrial control panels to protect distribution circuits, motor feeders, and other line loads in automation environments. It carries a 63 A rated current, features a B-characteristic trip curve for overload protection, and uses cage-terminal connections for secure wiring; the trip mechanism combines thermal protection for overload with an electromechanical element for short-circuit protection, while operating at voltages up to 690 V AC (50/60 Hz) and up to 375 V DC. For installation, the S803S-B63 is designed for standard TH35 DIN rails (35 x 15 mm, TH35-15) and is compatible with TH35 rails in typical enclosures, making it suitable for distribution boards, motor-control centers, and other industrial control architectures that require a compact 3-pole device with 63 A protection.