Thermal Overload Relay, 3UA Series, Variant J - 3UA52001J

Product Description

🔹 Siemens Thermal Overload Relay – 3UA52001J (3UA Series, Variant J)

🔹 Product Description

The Siemens 3UA52001J 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 mechanism, where motor current heats a bimetal strip, and excessive heating causes it to bend and trip the relay, disconnecting the motor circuit.

This relay is commonly used with Siemens contactors in motor starter assemblies, providing reliable and economical motor protection in industrial applications. It helps prevent overheating, winding damage, and unexpected motor failure due to electrical faults.

The 3UA52001J is typically used for the 6.3–10 A current range (depending on adjustment setting) and is suitable for applications such as MCC panels, pumps, compressors, conveyors, HVAC systems, and general industrial motor protection systems.

🔹 Key Features

• Genuine Siemens 3UA Series thermal overload relay
• Model Number: 3UA52001J
• Bimetallic overload protection system
• Adjustable current setting for motor protection
• 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 mounting
• Industrial-grade durability and long service life