The QI3ZDP is an industrial solid-state overload relay / soft starter module from the GE Fanuc ASTAT series (ASTAT IBP PLUS platform). It is designed to protect and control three-phase motors in industrial drive and motor control systems. The device is commonly used in motor starters, pumps, compressors, and heavy industrial machinery where reliable overload protection is required.
This model operates at up to 600 VAC, 50/60 Hz, and provides electronic protection functions such as overload detection, phase loss protection, and phase imbalance monitoring. Unlike traditional thermal overload relays, it uses solid-state electronics, which improves accuracy, response speed, and long-term reliability. It is typically matched with specific current ratings depending on the motor size and starter frame.
The QI3ZDP is part of a discontinued legacy product line, meaning it is no longer manufactured and is mainly available through surplus, refurbished, or repair markets. It is still widely used in existing industrial installations where older GE motor control systems remain in operation, especially in situations where full system replacement is costly or impractical.
