🔹 Siemens Thermal Overload Relay – 3UA50001E (3UA Series, Variant E)
The Siemens 3UA50001E is a thermal overload relay from the 3UA Series designed to protect three-phase induction motors from overload, phase loss, and sustained overcurrent conditions. It works on a bimetallic thermal principle, where excessive current heats the bimetal strip, causing it to bend and activate the trip mechanism, disconnecting the motor from the supply.
This relay is commonly used with Siemens contactors as part of motor starter assemblies, providing dependable and economical protection for industrial motors. It helps prevent overheating, winding damage, and unexpected motor failures caused by electrical faults.
The 3UA50001E is suitable for use in motor control centers (MCCs), industrial automation systems, pumps, compressors, conveyors, HVAC systems, machine tools, and general-purpose motor protection applications in manufacturing industries.
• Genuine Siemens 3UA Series thermal overload relay
• Model Number: 3UA50001E
• Bimetallic thermal 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 | 3UA50001E |
| 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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