🔹 Siemens Thermal Overload Relay – 3UA58002VZ1 (3UA Series, Variant VZ1)
🔹 Product Description
The Siemens 3UA58002VZ1 is a thermal overload relay from the Siemens 3UA Series, designed for reliable protection of electric motors in medium-to-heavy duty industrial applications. It safeguards motors from overload, phase failure, and overheating, ensuring safe and continuous operation of machinery in industrial environments.
This VZ1 variant belongs to the 3UA5800 frame range, which is typically used for medium-to-higher current motor starter systems. It is commonly mounted with Siemens contactors (such as 3TF series) and used in applications like pumps, compressors, conveyors, and industrial automation panels.
The relay operates on a bimetal thermal principle, where the motor current passes through heater elements that warm bimetal strips. When excessive current flows, the strips bend and activate a trip mechanism, disconnecting the motor circuit to prevent damage.
According to Siemens 3UA series design characteristics, this class of relay provides inverse-time overload protection and phase-failure protection, making it suitable for standard industrial motor duty cycles.
🔹 Key Features
• Genuine Siemens 3UA Series thermal overload relay
• Model: 3UA58002VZ1
• VZ1 variant for contactor-mounted motor protection systems
• Bimetal thermal overload protection technology
• Protection against overload and phase failure
• Suitable for industrial motor starter assemblies
• Adjustable current setting (typically ~32–50 A range for 3UA5800 class variants)
• Reliable inverse-time tripping characteristic
• High durability and long operational life
• Compatible with Siemens 3TF contactor systems
• Compact modular installation design
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3UA Series |
| Model Number | 3UA58002VZ1 |
| Product Type | Thermal Overload Relay |
| Variant | VZ1 |
| Protection Type | Overload + Phase Failure Protection |
| Operating Principle | Bimetal Thermal Mechanism |
| Mounting Type | Contactor Mounted |
| Current Range | ~32 – 50 A (typical 3UA5800 VZ1 range) |
| Application | Motor Protection / Industrial Control Panels |
| Brand | Siemens |
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