🔹 Siemens Thermal Overload Relay – 3UA58002TZ2 (3UA Series, Variant TZ2)
🔹 Product Description
The Siemens 3UA58002TZ2 is a thermal overload relay from the Siemens 3UA Series, designed to provide reliable protection for industrial electric motors against overload, phase failure, and overheating conditions. It ensures safe motor operation by disconnecting the circuit when current exceeds safe limits for a sustained period.
This TZ2 variant belongs to the 3UA5800 frame range, typically used in contactor-mounted motor starter systems and industrial control panels. It is commonly applied in machinery such as pumps, compressors, conveyors, and other automation systems where consistent motor protection is required.
The relay operates on a bimetal thermal mechanism, where motor current passes through heater elements that generate heat. When excessive current flows, the bimetal strips bend and activate the trip mechanism, opening the control circuit and protecting the motor from damage.
According to Siemens 3UA series design principles, these relays provide inverse-time delay tripping and phase-loss protection, making them suitable for standard industrial duty motor applications.
🔹 Key Features
• Genuine Siemens 3UA Series thermal overload relay
• Model: 3UA58002TZ2
• TZ2 variant for contactor-mounted motor protection systems
• Bimetal thermal overload protection technology
• Protection against overload and phase failure
• Suitable for industrial motor starter panels
• Designed for medium-to-high current applications (3UA5800 frame class)
• Reliable inverse-time tripping characteristic
• High durability and long service life
• Compatible with Siemens 3TF contactor systems
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3UA Series |
| Model Number | 3UA58002TZ2 |
| Product Type | Thermal Overload Relay |
| Variant | TZ2 |
| Protection Type | Overload + Phase Failure Protection |
| Operating Principle | Bimetal Thermal Mechanism |
| Mounting Type | Contactor Mounted |
| Current Range | ~32 – 50 A (typical for 3UA5800 TZ2 class variants) |
| Application | Motor Protection / Industrial Control Panels |
| Brand | Siemens |
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