The ABB part CA4-10 is a high-quality accessory designed for use with ABB contactors in the AF range. Specifically, this accessory is part of the OLS (Overload Relays) and MMPS (Motor Maintenance and Protection System) family of products. By incorporating the CA4-10 into your setup, you can enhance the performance and functionality of your contactors, ensuring reliable and efficient operation for your industrial applications.