Siemens SIRIUS 3RU2116-1KB0 Thermal Overload Relay, 1.1-1.6 A, Class 10, S00, 3-Pole, 1NO+1NC, Screw Terminals

With a current setting range of 1.1 to 1.6 A and tripping class 10, the Siemens 3RU2116-1KB0 thermal overload relay delivers precise motor protection in a compact S00 frame. Its 3-pole design and 1NO+1NC auxiliary contacts make it a versatile choice for direct mounting on contactors or standalone installation.

Overview

The SIRIUS 3RU21 series is engineered for reliable overload protection of motors up to 690 V AC. This relay features thermal overload release with phase failure sensitivity, ensuring rapid response to unbalanced loads. Manual or automatic reset options provide flexibility for different applications, while the IP20 degree of protection suits industrial control panels.

What stands out

• Wide current adjustment range: 1.1 - 1.6 A
• Tripping class 10 for normal motor starting conditions
• Compact S00 size saves panel space
• 1 NO + 1 NC auxiliary contacts for control and signaling
• Direct mounting to contactors or standalone installation
• Phase failure sensitivity enhances motor protection
• Manual/automatic reset function
• Complies with IEC 60947-4-1 and IEC 60947-5-1

Technical details

• Current setting range: 1.1 - 1.6 A
• Tripping class: CLASS 10
• Size: S00
• Number of poles: 3
• Auxiliary contacts: 1 NO + 1 NC
• Mounting type: Direct mounting to contactor / Stand-alone
• Connection type: Screw terminals
• Rated operational voltage (Ue): Up to 690 V AC
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Degree of protection: IP20
• Ambient operating temperature: -20 to +60 °C
• Reset function: Manual / Automatic
• Overload release type: Thermal
• Phase failure sensitivity: Yes
• Product series: SIRIUS 3RU21
• Standards compliance: IEC 60947-4-1, IEC 60947-5-1
• Suitable for: Motor protection

Our verdict

The Siemens 3RU2116-1KB0 is a robust thermal overload relay that combines precise adjustment, phase failure sensitivity, and compact dimensions. Its compliance with international standards and flexible mounting options make it an excellent choice for motor protection in industrial environments.