🔹 Siemens Thermal Overload Relay – 3UA50001G (3UA Series, Variant G)
The Siemens 3UA50001G is a thermal overload relay from the 3UA Series designed to protect three-phase induction motors from overload, phase failure, and sustained overcurrent conditions. It operates using a bimetallic thermal sensing system, where excessive current heats the bimetal strip, causing it to bend and trigger a trip mechanism that disconnects the motor from the supply.
This relay is commonly used with Siemens contactors in motor starter assemblies to ensure safe and reliable motor operation in industrial environments. It helps prevent motor overheating, winding damage, and unexpected downtime caused by electrical faults.
The 3UA50001G is suitable for applications such as motor control centers (MCCs), industrial automation systems, pumps, compressors, conveyors, HVAC systems, machine tools, and general-purpose motor protection in manufacturing industries.
• Genuine Siemens 3UA Series thermal overload relay
• Model Number: 3UA50001G
• Bimetallic overload protection system
• Protection against overload and phase failure
• Trip-free safety mechanism for reliable operation
• Temperature compensated design for stable performance
• Suitable for three-phase motor protection
• Compact design for contactor-based motor starters
• Durable industrial-grade construction
• Long service life with consistent performance
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3UA Series |
| Model Number | 3UA50001G |
| 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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