🔹 Siemens Thermal Overload Relay – 3UA50001C (3UA Series, Variant C)
The Siemens 3UA50001C is a thermal overload relay from the 3UA series designed to protect three-phase induction motors against overload, phase failure, and sustained overcurrent conditions. It operates using a bimetallic thermal mechanism, where excess current heats the bimetal strip, causing it to bend and trigger a trip action that disconnects the motor from the supply.
This relay is commonly used in Siemens motor starter assemblies along with contactors to ensure reliable motor protection in industrial environments. It helps prevent overheating, insulation damage, and unexpected motor failure caused by electrical faults.
The 3UA50001C is suitable for applications such as motor control centers (MCCs), industrial automation systems, pumps, compressors, conveyors, HVAC systems, machine tools, and general industrial motor protection systems.
• Genuine Siemens 3UA Series thermal overload relay
• Model Number: 3UA50001C
• Bimetallic overload protection system
• Protection against overload and phase failure
• Trip-free mechanism for enhanced safety
• Temperature compensated operation for stability
• Suitable for three-phase motor protection
• Compact design for motor starter integration
• Reliable industrial-grade construction
• Long service life and consistent performance
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3UA Series |
| Model Number | 3UA50001C |
| Product Type | Thermal Overload Relay |
| Protection Type | Overload + Phase Failure Protection |
| Operating Principle | Bimetal Thermal Mechanism |
| Application | Motor Protection |
| Mounting Type | Contactor Mounted / Panel Mounted |
| Reset Type | Manual / Automatic (variant dependent) |
| Trip Class | Class 10A (typical for series) |
| Industry Use | Industrial Automation, MCCs, HVAC, Pumps |
| Brand | Siemens |
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