🔹 Siemens Thermal Overload Relay – 3UA55002Q (3UA Series, Variant Q)
The Siemens 3UA55002Q is a thermal overload relay from the 3UA Series designed to protect three-phase induction motors from overload, phase failure, and sustained overcurrent conditions. It operates using a bimetallic thermal mechanism, where excess motor current heats the bimetal strip, causing it to bend and activate the trip mechanism, disconnecting the motor from the supply.
This relay is typically used with Siemens contactors in motor starter assemblies, ensuring safe and reliable protection for industrial motors. It helps prevent overheating, insulation damage, and unexpected breakdowns caused by electrical faults.
The 3UA55002Q is generally associated with a higher current setting range (around 25–40 A, depending on adjustment configuration), making it suitable for heavy-duty industrial motors.
• Genuine Siemens 3UA Series thermal overload relay
• Model Number: 3UA55002Q
• Bimetallic overload protection system
• Adjustable current range (approx. 25–40 A)
• Protection against overload and phase failure
• Trip-free mechanism for safe operation
• Temperature compensated design for stability
• Suitable for three-phase motor protection
• Contactor-mounted compact design
• Industrial-grade durability and performance
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3UA Series |
| Model Number | 3UA55002Q |
| Product Type | Thermal Overload Relay |
| Protection Type | Overload + Phase Failure Protection |
| Operating Principle | Bimetal Thermal Mechanism |
| Current Range | ~25 – 40 A (typical frame dependent) |
| Mounting Type | Contactor Mounted / Plug-in |
| Application | Motor Protection |
| Compatible Contactors | Typically Siemens 3TF50 / 3TF51 / 3TF52 series (range dependent) |
| Brand | Siemens |
No reviews yet.