🔹 Siemens Thermal Overload Relay – 3UA58002FZ1 (3UA Series, Variant FZ1)
🔹 Product Description
The Siemens 3UA58002FZ1 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 operation of industrial motors by automatically disconnecting the circuit when abnormal current or thermal conditions are detected.
This FZ1 variant belongs to the 3UA5800 frame range, commonly used in medium-to-higher current motor applications. It is typically installed with Siemens contactors (such as 3TF series) in motor starter assemblies used across industrial automation, pumps, compressors, conveyors, and heavy machinery systems.
The relay operates using a bimetal thermal mechanism, where excess current generates heat, causing the bimetal strips to bend and trigger tripping, thereby protecting the motor from damage and failure.
🔹 Key Features
• Genuine Siemens 3UA Series thermal overload relay
• Model: 3UA58002FZ1
• FZ1 variant for contactor-mounted motor protection systems
• Bimetal thermal overload protection technology
• Protection against overload and phase failure
• Suitable for industrial motor starter panels
• Adjustable current setting (typically in the higher mid-range of 3UA5800 series, ~32–50 A depending on configuration)
• High reliability and long operational life
• Compatible with Siemens 3TF contactor systems
• Compact modular design for easy installation
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3UA Series |
| Model Number | 3UA58002FZ1 |
| Product Type | Thermal Overload Relay |
| Variant | FZ1 |
| Protection Type | Overload + Phase Failure Protection |
| Operating Principle | Bimetal Thermal Mechanism |
| Mounting Type | Contactor Mounted |
| Current Range | ~32 – 50 A (typical for 3UA5800 frame variants) |
| Application | Motor Protection / Starter Assemblies |
| Brand | Siemens |
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