Siemens Auxiliary Contact Block 2 NC + 1 NO (3RH2911-1HA12)

The Siemens 3RH2911-1HA12 auxiliary contact block is a high-quality switching device designed for use with SIRIUS 3RT2 contactors and 3RH2 contactor relays. It provides reliable signal transmission and control functions in industrial automation systems.

Advantages

This auxiliary contact block offers a compact design with screw terminals for easy wiring. It features 2 normally closed (NC) and 1 normally open (NO) contacts, providing flexibility for various control circuits. The front-mounted installation simplifies assembly and maintenance.

Suitable for

• Industrial control panels
• Motor control centers
• Automation systems requiring auxiliary contacts
• Switching and signaling applications

Key specifications

• Contact configuration: 2 NC + 1 NO
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Rated operational current (AC-15, 230 V): 6 A
• Rated operational current (DC-13, 24 V): 10 A
• Degree of protection: IP40 (front), IP20 (terminals)
• Ambient operating temperature: -25 to +60 °C
• Electrical endurance: 10 million switching cycles (AC-15, 230 V)
• Mechanical endurance: 30 million switching cycles
• Standards: IEC 60947-5-1, EN 60947-5-1
• Pollution degree: 3
• Surge voltage category: III

Recommendations

For optimal performance, use this auxiliary contact block with compatible Siemens SIRIUS contactors and contactor relays. Ensure proper mounting and wiring according to the manufacturer's instructions.