The ABB part CAL19-11B is an essential accessory for ABB contactors in the AF range. It is specifically designed for use with Overload Relays (OLS) and Motor-Operated Push Buttons (MMPS), ensuring smooth and efficient operation of your electrical system. This high-quality accessory is manufactured by ABB, a globally recognized leader in power and automation technologies. Install the CAL19-11B to enhance the functionality and performance of your ABB contactors, ensuring reliable and safe operation for your applications.