Industrial 3ZA4043-8AP00 Size 3 Motor Starter

3ZA4043-8AP00 is a NEMA Size 3 overload relay engineered to accompany Allis-Chalmers/Siemens XL-3DCO motor starters, identifying it as the protective relay component within that specific XL-3DCO assembly. The model is specified for a current range of 55 to 80 amperes, placing it in the mid‑range category for protective devices used with three‑phase motors, and aligning with the needs of standard Size 3 starters in industrial control panels. As part of the XL‑3DCO family, the 3ZA4043‑8AP00 maps to a particular relay configuration that works alongside compatible contactors to deliver coordinated motor protection without requiring a full replacement of the starter. This exact part number is documented in aftermarket and supplier listings as a replacement relay for Size 3 XL‑3DCO starters, enabling technicians to service legacy motor-control systems that rely on Allis-Chalmers/Siemens components.