🔹 Siemens Thermal Overload Relay – 3UA58002PZ2 (3UA Series, Variant PZ2)
🔹 Product Description
The Siemens 3UA58002PZ2 is a thermal overload relay from the Siemens 3UA Series, engineered to provide reliable protection for electric motors against overload, phase failure, and overheating conditions. It ensures safe motor operation by disconnecting the circuit when excessive current causes thermal stress beyond permissible limits.
This PZ2 variant belongs to the 3UA5800 frame range, typically used in medium-to-higher current industrial motor applications. It is designed for mounting with Siemens contactors (such as 3TF series) and is widely used in motor starter assemblies for pumps, compressors, conveyors, and heavy-duty machinery in industrial automation systems.
The relay operates on a bimetal thermal principle, where current flowing through heater elements generates heat. When the temperature rises above the set threshold, the bimetal strips bend and trigger tripping, disconnecting the motor circuit to prevent damage.
🔹 Key Features
• Genuine Siemens 3UA Series thermal overload relay
• Model: 3UA58002PZ2
• PZ2 variant for contactor-mounted motor starter systems
• Bimetal thermal overload protection technology
• Protection against overload and phase failure
• Suitable for industrial motor control panels
• Adjustable current setting (typically higher mid-range of 3UA5800 series, approx. 32–50 A depending on configuration)
• High reliability and long service life
• Compatible with Siemens 3TF contactor systems
• Compact modular design for easy installation
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3UA Series |
| Model Number | 3UA58002PZ2 |
| Product Type | Thermal Overload Relay |
| Variant | PZ2 |
| Protection Type | Overload + Phase Failure Protection |
| Operating Principle | Bimetal Thermal Mechanism |
| Mounting Type | Contactor Mounted |
| Current Range | ~32 – 50 A (typical 3UA5800 PZ2 range) |
| Application | Motor Protection / Starter Panels |
| Brand | Siemens |
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