Product Description
Siemens SIRIUS Thermal Overload Relay – 3UW5102-1D (2–3.2 A, Class 10)
The Siemens 3UW5102-1D is a SIRIUS bi-metal thermal overload relay designed to protect three-phase motors from overload, phase failure, and excessive heating. It is used in combination with Siemens contactors to form a reliable motor starter protection system.
This relay provides protection by monitoring motor current and tripping when the current exceeds the set range for a defined time, preventing damage to motor windings and ensuring safe operation in industrial applications.
It belongs to the 2–3.2 A adjustable current range and is commonly used for small motor loads, pumps, fans, and light industrial machinery.
Key Features:
• Siemens SIRIUS thermal overload relay
• Bi-metal sensing technology
• Adjustable current range: 2 – 3.2 A
• 3-phase motor protection
• Class 10 tripping characteristic (fast motor protection)
• Phase failure protection included
• Direct mounting with Siemens contactors
• Manual/automatic reset (variant dependent)
• Reliable and maintenance-free design
• Suitable for industrial motor starter applications
Technical Specifications
|
Parameter
|
Specification
|
|
Product
Model
|
3UW5102-1D
|
|
Brand
|
Siemens
|
|
Series
|
SIRIUS
|
|
Type
|
Thermal
Overload Relay (Bi-metal)
|
|
Current
Range
|
2 – 3.2 A
|
|
Tripping
Class
|
Class 10
|
|
Phase
Protection
|
Yes
|
|
Reset Type
|
Manual /
Auto (variant dependent)
|
|
Mounting
|
Contactor mounted
|
|
Application
|
Motor
protection
|
|
Operating
Principle
|
Thermal
bi-metal expansion
|
|
Standards
|
IEC
60947-4-1
|
