Thermal Overload Relay, 3UA Series, Variant UZ1 - 3UA58002UZ1

Product Description

🔹 Siemens Thermal Overload Relay – 3UA58002UZ1 (3UA Series, Variant UZ1)

🔹 Product Description

The Siemens 3UA58002UZ1 is a thermal overload relay from the Siemens 3UA Series, designed for reliable protection of industrial electric motors against overload, phase failure, and overheating conditions. It ensures safe operation by disconnecting the motor circuit whenever current exceeds safe limits for a sustained period.

This UZ1 variant belongs to the 3UA5800 frame range, which is typically used in medium-to-heavy duty motor starter applications. It is commonly mounted with Siemens contactors such as the 3TF series, and is widely used in industrial systems like pumps, compressors, conveyors, and general-purpose machinery.

The relay operates on a bimetal thermal principle, where motor current passes through heater elements that generate heat. When excessive current flows, the bimetal strips bend and trigger a trip mechanism, protecting the motor from damage and preventing downtime.

Based on Siemens 3UA series design structure, this relay provides inverse-time overload protection along with phase-failure sensitivity, making it suitable for continuous industrial duty applications.

🔹 Key Features

• Genuine Siemens 3UA Series thermal overload relay
• Model: 3UA58002UZ1
• UZ1 variant for contactor-mounted motor protection systems
• Bimetal thermal overload protection technology
• Protection against overload and phase failure
• Suitable for industrial motor starter panels
• Designed for medium-to-high current applications
• Reliable inverse-time tripping characteristic
• High durability and long operational life
• Compatible with Siemens 3TF contactor systems