🔹 Siemens Thermal Overload Relay – 3UA52001H (3UA Series, Variant H)
The Siemens 3UA52001H is a thermal overload relay from the 3UA Series designed for protection of three-phase induction motors against overload, phase failure, and sustained overcurrent conditions. It operates using a bimetallic thermal mechanism, where increased motor current heats a bimetal strip, causing it to bend and trigger the trip mechanism, thereby disconnecting the motor circuit and preventing damage.
This relay is commonly used with Siemens contactors in motor starter assemblies, ensuring safe and reliable motor protection in industrial applications. It helps prevent motor overheating, insulation failure, and unexpected breakdowns due to electrical faults.
The 3UA52001H is typically used in motor control centers (MCCs), industrial automation systems, pumps, compressors, conveyors, HVAC systems, machine tools, and general-purpose motor protection applications.
• Genuine Siemens 3UA Series thermal overload relay
• Model Number: 3UA52001H
• Bimetallic overload protection system
• Protection against overload and phase failure
• Trip-free safety mechanism for reliable operation
• Temperature compensated operation 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 | 3UA52001H |
| 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) |
| Current Range | Typically 5 – 8 A (series dependent) |
| Industry Use | Industrial Automation, MCCs, HVAC, Pumps |
| Brand | Siemens |
No reviews yet.