Siemens SIRIUS blocco contatti ausiliari 2NO+2NC (3RH2911-1GA22)

The Siemens 3RH2911-1GA22 is a high-quality auxiliary contact block from the SIRIUS series, designed for front mounting on SIRIUS contactors. It features 2 normally open (NO) and 2 normally closed (NC) contacts, providing reliable switching and signaling in industrial control applications.

Advantages

Compact design saves space in control cabinets. Screw terminals ensure secure and easy wiring. High electrical and mechanical durability reduces maintenance. Wide operating temperature range allows use in demanding environments.

Suitable for

• Industrial automation and control systems
• Motor control centers
• Switchgear and distribution boards
• Building automation

Key specifications

• Product Type: Auxiliary Contact Block
• Series: SIRIUS
• Contact Configuration: 2 Normally Open (NO) + 2 Normally Closed (NC)
• Mounting Type: Front Mounting
• Connection Type: Screw Terminals
• Rated Insulation Voltage (Ui): 690 V
• Rated Impulse Withstand Voltage (Uimp): 6 kV
• Rated Operational Current (AC-15, 230V): 10 A
• Rated Operational Current (DC-13, 24V): 1 A
• Operating Temperature Range: -25 to +60 °C
• Degree of Protection: IP20
• Electrical Durability: 10 million switching cycles
• Mechanical Durability: 30 million switching cycles
• Short-Circuit Protection (Fuse gG): 10 A
• Terminal Cross-Section (Solid): 0.5 - 2.5 mm²
• Tightening Torque: 0.8 - 1.2 N·m
• Standards: IEC 60947-5-1, EN 60947-5-1

Recommendations

For optimal performance, use with Siemens SIRIUS 3RT2 and 3RT1 contactors. Ensure proper tightening torque and use appropriate fuses for short-circuit protection.