The ABB B7D‑40‑00 is a compact 4‑pole miniature contactor designed for switching AC or DC control circuits and moderate three‑phase or single‑phase loads. It provides a space-saving solution for control panels, automation cabinets, HVAC systems, small machines, lighting circuits, and general-purpose switching tasks. The B7D‑40‑00 uses a DC-operated coil to enable control via DC control circuits while providing AC switching capability for the main circuit. It is designed for durability, stable operation, and multiple switching cycles, making it suitable for both industrial and commercial control environments.
