The SIEMENS 3RT2017-4BB42 POWER CONTACTOR is a reliable and efficient industrial automation component designed for controlling power to various systems. With a rating of AC-3 12A and 5.5 kW at 400V, this 3-pole contactor is suitable for a wide range of applications. It features a single normally closed (1NC) contact and operates on 24V DC control power. manufactured by Siemens, a trusted brand in the industry, this power contactor ensures high performance and durability for your automation needs.