B7-30-01-01 is a compact mini contactor from ABB designed for space-constrained applications, featuring one normally closed auxiliary contact for auxiliary circuit switching. This contactor is rated for 5.5 kW at 400 V AC-3 and 20 A AC-1 at 400 V, with a coil consumption of 3.5 W for AC control supply. The device is among the flattest contactors on the market, making it ideal for modular and compact installations where space is at a premium. It is commonly used in motor control applications up to 5.5 kW, industrial automation, and auxiliary circuit switching where reliable contact performance and compact form factor are essential.