Thermal Overload Relay, 3UA Series, Variant K - 3UA52001K

🔹 Siemens Thermal Overload Relay – 3UA52001K (3UA Series, Variant K)

🔹 Product Description

The Siemens 3UA52001K is a thermal overload relay from the 3UA Series designed to protect three-phase induction motors against overload, phase failure, and sustained overcurrent conditions. It works on a bimetallic thermal principle, where excess current heats the bimetal strip, causing it to bend and trip the relay, disconnecting the motor circuit.

This relay is typically used with Siemens contactors in motor starter assemblies, providing reliable and economical protection for motors used in continuous industrial duty. It helps prevent overheating, winding damage, and unexpected breakdowns due to electrical faults.

The 3UA52001K corresponds to the higher current range of the 3UA5200 frame (typically around 10–14 A range depending on setting), making it suitable for larger small-to-medium industrial motors.

🔹 Key Features

• Genuine Siemens 3UA Series thermal overload relay
• Model Number: 3UA52001K
• 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
• Suitable for three-phase motor protection
• Compact contactor-mounted design
• Industrial-grade durability and long service life