Allen-Bradley 193-A2P6 Overload Relay 128-400A

The Allen‑Bradley 193‑A2P6 Overload Relay is a manual‑reset protection device in the 193 family designed to accompany Allen‑Bradley motor starters and guard AC motors against overload. It is rated for 128–400 A and uses a 400/5 current transformer to sense motor current and trigger a trip when overload is detected. This is the Series B variant (SER B) of the 193‑A2P6 model, featuring a 400/5 current ratio and manual reset operation. The relay is intended for motor control circuits requiring automatic protection from overcurrent, and is typically paired with a compatible contactor to form a complete motor starter assembly. In operation, it monitors line current and opens the circuit when the load exceeds the rated range, helping prevent motor damage and electrical faults; after a fault, the device must be reset manually to restore operation. Typical applications include conveyors, pumps, fans, and other industrial machinery where motors run within the 128–400 A window and where a manual reset overload protection is appropriate for operator control and maintenance workflows.