🔹 Siemens Thermal Overload Relay – 3UA62305B (3UA Series, Variant B)
🔹 Product Description
The Siemens 3UA62305B is a thermal overload relay from the Siemens 3UA Series, designed for heavy-duty motor protection applications. It provides reliable safeguarding of electric motors against overload, phase failure, and overheating, ensuring safe and continuous operation in industrial environments.
This B variant belongs to the 3UA6230 frame range, which is typically used for high current and CT-operated motor protection systems. It is widely applied in motor control centers (MCC), large pumps, compressors, crushers, conveyors, and industrial drive systems where higher current handling is required.
The relay operates on a bimetal thermal mechanism (current-dependent inverse time principle). In case of overload, the increased current heats the bimetal strips, causing them to bend and trip the relay, thereby opening the control circuit and protecting the motor from damage.
🔹 Key Features
• Genuine Siemens 3UA Series thermal overload relay
• Model: 3UA62305B
• B variant for high-current industrial applications
• Designed for CT-operated / heavy-duty motor protection systems
• Thermal bimetal overload protection principle
• Protection against overload and phase failure
• Suitable for MCC panels and large motor starter systems
• Reliable tripping characteristics for continuous industrial duty
• High durability and long operational life
• Compatible with Siemens industrial control systems
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3UA Series |
| Model Number | 3UA62305B |
| Product Type | Thermal Overload Relay (Heavy Duty) |
| Variant | B |
| Protection Type | Overload + Phase Failure Protection |
| Operating Principle | Bimetal Thermal Mechanism |
| Mounting Type | Panel / CT Operated System |
| Current Range | 115 – 180 A (typical for 3UA6230 series) |
| Application | Heavy Industrial Motor Protection |
| Brand | Siemens |
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