Thermal Overload Relay, 3UA Series, Variant PZ1 - 3UA58002PZ1

🔹 Siemens Thermal Overload Relay – 3UA58002PZ1 (3UA Series, Variant PZ1)

🔹 Product Description

The Siemens 3UA58002PZ1 is a thermal overload relay from the Siemens 3UA Series, designed for dependable protection of electric motors against overload, phase failure, and overheating conditions. It ensures safe motor operation by automatically disconnecting the circuit when abnormal current causes excessive thermal stress.

This PZ1 variant belongs to the 3UA5800 frame range, typically used in medium-to-higher current motor applications. It is commonly mounted with Siemens contactors (such as 3TF series) in motor starter assemblies used for industrial automation, pumps, compressors, conveyors, and heavy-duty machinery.

The relay operates on a bimetal thermal mechanism, where current flowing through the heater elements produces heat. When the temperature rises beyond the set limit, the bimetal strips bend and trigger tripping, protecting the motor from damage and failure.

🔹 Key Features

• Genuine Siemens 3UA Series thermal overload relay
• Model: 3UA58002PZ1
• PZ1 variant for contactor-mounted motor protection systems
• Bimetal thermal overload protection technology
• Protection against overload and phase failure
• Suitable for industrial motor starter applications
• Adjustable current setting (typically within ~32–50 A range for 3UA5800 frame variants)
• High reliability and long service life
• Compatible with Siemens 3TF contactor systems
• Compact modular design for easy installation