The TECO CU-11 3A1b is a robust three-phase magnetic contactor designed for precise and reliable control of motors and power circuits in industrial environments. Operating at AC 220 V, it provides stable switching performance and efficient electrical conductivity under continuous operation. Featuring a normally closed (NC) auxiliary contact, it enhances circuit protection and operational safety within automation and power distribution systems. The TECO CU-11 3A1b could potentially be implemented across North America, Europe, Asia, and worldwide in applications requiring dependable three-phase contact control and long-term electrical reliability.