Siemens SIRIUS Bimetal Relay – 6.3…10 A, Size S0, Class 10 – 3US5000-1J8K
The Siemens 3US5000-1J8K is a SIRIUS bimetal thermal overload relay designed for reliable motor protection in industrial control circuits. It protects motors against overload conditions, phase imbalance, and single-phasing effects, ensuring safe and long-life operation of electrical drives.
This relay belongs to Size S0 and offers an adjustable current setting range of 6.3 to 10 A, making it suitable for small to medium motor applications. With Class 10 tripping characteristic, it provides fast response under overload conditions, helping prevent motor overheating and insulation damage.
It is typically used in combination with Siemens contactors in motor starter assemblies for pumps, fans, conveyors, compressors, and general industrial automation systems.
Key Features:
• Siemens SIRIUS bimetal thermal overload relay
• Adjustable current range: 6.3 – 10 A
• Size S0 compact design
• Class 10 tripping characteristic for fast motor protection
• Phase loss protection (single phasing protection)
• Direct mounting with Siemens SIRIUS contactors
• Manual/automatic reset options (configuration dependent)
• Screw terminal connection for secure wiring
• High reliability thermal bimetal sensing mechanism
• Suitable for industrial motor starter panels
Technical Specifications
|
Parameter |
Specification |
|
Product Model |
3US5000-1J8K |
|
Brand |
Siemens |
|
Product Series |
SIRIUS 3US |
|
Product Type |
Bimetal Thermal Overload Relay |
|
Current Setting Range |
6.3 – 10 A |
|
Size |
S0 |
|
Tripping Class |
Class 10 |
|
Protection Functions |
Overload + Phase failure protection |
|
Mounting Type |
Contactor-mounted (SIRIUS system) |
|
Reset Type |
Manual / Automatic (variant dependent) |
|
Connection Type |
Screw terminals |
|
Application |
Motor protection |
|
Operating Principle |
Thermal bimetal expansion |
|
Standards |
IEC 60947-4-1 |
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