Thermal Overload Relay, 3UA Series, Variant C - 3UA50000C

🔹 Siemens Thermal Overload Relay – 3UA50000C (3UA Series, Variant C)

🔹 Product Description

The Siemens 3UA50000C is a 3UA Series thermal overload relay designed to protect three-phase induction motors against overload, phase failure, and prolonged overcurrent conditions. It operates on the bimetallic thermal principle, where excessive current causes the bimetal element to heat and bend, triggering a trip mechanism that disconnects the motor from the supply.

This relay is widely used in combination with Siemens contactors to form a complete motor starter assembly. It ensures reliable motor protection in industrial environments by preventing overheating, winding damage, and unexpected breakdowns due to electrical faults.

The 3UA50000C 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.

🔹 Key Features

• Genuine Siemens 3UA Series thermal overload relay
• Model Number: 3UA50000C
• Bimetallic thermal overload protection
• Protects against overload and phase failure
• Reliable motor safety and equipment protection
• Temperature compensation for stable operation
• Trip-free mechanism for safety compliance
• Adjustable current setting range (as per motor rating)
• Suitable for three-phase motor protection
• Compact design for contactor-based starters
• Long service life and industrial-grade durability