🔹 Siemens Thermal Overload Relay – 3UA50000E (3UA Series, Variant E)
The Siemens 3UA50000E 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 works on the bimetallic thermal principle, where excess current heats the bimetal strip, causing it to bend and trip the relay, thereby disconnecting the motor circuit to prevent damage.
This relay is typically used in combination with Siemens contactors to form a complete motor starter system. It ensures reliable motor protection in industrial environments by preventing overheating, insulation damage, and unexpected breakdowns caused by electrical faults.
The 3UA50000E is suitable for a wide range of applications such as motor control centers (MCCs), industrial automation systems, pumps, compressors, conveyors, HVAC systems, machine tools, and manufacturing equipment.
• Genuine Siemens 3UA Series thermal overload relay
• Model Number: 3UA50000E
• Bimetallic overload protection technology
• Protection against overload and phase loss
• Trip-free mechanism for safe operation
• Temperature compensated design for stable performance
• Suitable for three-phase motor protection
• Compact design for contactor-based motor starters
• Reliable industrial-grade construction
• Long service life with consistent performance
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3UA Series |
| Model Number | 3UA50000E |
| 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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