Siemens Auxiliary Switch Block 2 NO (Normally Open) 3RH2911-2HA20

The Siemens 3RH2911-2HA20 is a high-quality auxiliary switch block designed for use with SIRIUS 3RT2 contactors and 3RH2 control relays. This front-mounted block features 2 normally open (NO) contacts with screw terminals, providing reliable switching and monitoring in industrial automation applications. Rated for insulation voltage up to 690 V and impulse withstand voltage of 6 kV, it ensures safe operation in demanding environments. With an electrical durability of 10 million switching cycles (AC-15) and mechanical durability of 30 million cycles, this auxiliary switch block offers long-lasting performance.

Advantages

Compact design for easy front mounting on contactors and relays. Screw terminals ensure secure and reliable connections. High switching capacity and long electrical/mechanical life reduce maintenance. Complies with IEC 60947-5-1 and EN 60947-5-1 standards for global use.

Suitable for

• Industrial control panels
• Motor control centers
• Automation systems requiring auxiliary contacts
• Signal feedback and interlocking circuits

Key specifications

• Product Type: Auxiliary Switch Block
• Number of Contacts: 2
• Contact Configuration: 2 NO (Normally Open)
• Mounting Type: Front Mounting
• Terminal Type: Screw Terminals
• Compatibility: For SIRIUS 3RT2 Contactors and 3RH2 Control Relays
• Series: SIRIUS
• Rated Insulation Voltage (Ui): 690 V
• Rated Impulse Withstand Voltage (Uimp): 6 kV
• Rated Operational Current (AC-15, 230V): 6 A
• Rated Operational Current (DC-13, 24V): 1 A
• Degree of Protection (IP): IP20 (terminals), IP40 (front)
• Operating Temperature Range: -25 to +60 °C
• Electrical Durability: 10 million switching cycles (AC-15)
• Mechanical Durability: 30 million switching cycles
• Standards Compliance: IEC 60947-5-1, EN 60947-5-1
• Short-circuit Protection (Fuse): 10 A gG
• Conductor Cross-section (min/max): 0.5 - 2.5 mm²

Recommendations

For optimal performance, use with Siemens SIRIUS 3RT2 contactors or 3RH2 control relays. Ensure proper tightening torque for screw terminals as per manufacturer guidelines. Suitable for use in industrial environments with IP20 minimum protection.