Thermal Overload Relay Accessory, 3UA Series, Variant D - 3UA58305D

🔹 Siemens Thermal Overload Relay – 3UA58305D (3UA Series, Variant D)

🔹 Product Description

The Siemens 3UA58305D is a thermal overload relay from the Siemens 3UA Series, designed for reliable industrial motor protection in medium-to-heavy duty applications. It safeguards electric motors from overload, phase failure, and excessive temperature rise, ensuring safe and continuous operation of machinery.

This D variant belongs to the 3UA5830 frame range, which is typically used for higher current motor applications in industrial automation systems. It is commonly installed in motor control centers (MCC panels) and works with Siemens contactor or starter assemblies depending on system configuration.

The relay uses a bimetal thermal operating principle, where excess current generates heat, causing the bimetal strips to bend and trigger a trip. This protects motors from damage, downtime, and electrical faults.

🔹 Key Features

• Genuine Siemens 3UA Series thermal overload relay
• Model: 3UA58305D
• D variant for industrial motor protection systems
• Bimetal thermal overload protection technology
• Protection against overload and phase failure
• Suitable for MCC panels and motor starter assemblies
• Designed for medium-to-high current applications
• Reliable inverse time tripping mechanism
• High durability for industrial environments
• Compact and modular design for easy integration