🔹 Siemens Thermal Overload Relay – 3UA58002UZ2 (3UA Series, Variant UZ2)
🔹 Product Description
The Siemens 3UA58002UZ2 is a thermal overload relay from the Siemens 3UA Series, designed for reliable motor protection in medium-to-heavy industrial applications. It protects electric motors from overload, phase failure, and excessive heating, ensuring safe operation and long equipment life.
This UZ2 variant belongs to the 3UA5800 frame range, commonly used in contactor-mounted motor starter systems such as Siemens 3TF series assemblies. It is widely applied in industrial automation systems including pumps, compressors, conveyors, and general-purpose motor control panels.
The relay works on a bimetal thermal principle, where motor current generates heat in heater elements. When the temperature exceeds the preset limit, the bimetal strips bend and trigger a trip mechanism, disconnecting the motor circuit to prevent damage.
According to Siemens 3UA design characteristics, this type of relay provides inverse-time delay tripping and phase-failure protection, making it suitable for standard industrial motor duty conditions.
🔹 Key Features
• Genuine Siemens 3UA Series thermal overload relay
• Model: 3UA58002UZ2
• UZ2 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 service life
• Compatible with Siemens 3TF contactor systems
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3UA Series |
| Model Number | 3UA58002UZ2 |
| Product Type | Thermal Overload Relay |
| Variant | UZ2 |
| Protection Type | Overload + Phase Failure Protection |
| Operating Principle | Bimetal Thermal Mechanism |
| Mounting Type | Contactor Mounted |
| Current Range | ~63 – 80 A (typical for 3UA5800 UZ2 class) |
| Application | Motor Protection / Industrial Control Panels |
| Brand | Siemens |
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