3RH2911-2GA31

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The Siemens 3RH2911-2GA31 is an industrial-grade auxiliary switch designed for reliable performance in automation systems. This front-mounted auxiliary switch features 3 normally open (NO) contacts and 1 normally closed (NC) contact, making it a versatile solution for controlling and signaling needs. It is engineered to snap onto Siemens contactor relays 3RH2140 and 3RH2440, providing seamless compatibility with S00 size contactors. The device comes with spring-loaded terminals and physical coding to ensure proper installation and operation according to EN 50011 standards. With a robust insulation voltage rating of 690 V AC and surge resistance up to 6 kV, the 3RH2911-2GA31 supports high durability and safety in demanding industrial environments.

Key Features of Siemens 3RH2911-2GA31

  • 3 NO + 1 NC contacts suitable for versatile switching applications
  • Spring-loaded terminals for secure and easy wiring
  • Physical coding prevents incorrect installation
  • Designed specifically for front mounting on 3RH2140 and 3RH2440 contactor relays
  • Insulation voltage rated up to 690 V AC with 6 kV surge voltage resistance
  • High mechanical service life of approximately 10 million operating cycles
  • Electrical endurance rated for around 200,000 AC-15 operating cycles at 230 V
  • Compact size compatible with Siemens S00 contactors
  • Protection class IP20 on the front side, ensuring dust protection

Technical Specs of 3RH2911-2GA31

Explore Siemens 3RH2911-2GA31 datasheet for detailed parameters to ensure system compatibility.

Specification Details
Contact Type 3 NO + 1 NC
Mounting Front mount on 3RH2140/3RH2440
Rated Voltage 690 V AC
Surge Voltage Resistance 6 kV
Current Path Configuration 1 NO, 1 NC, 1 NO, 1 NO
Mechanical Service Life Approx. 10 million cycles
Electrical Endurance Approx. 200,000 cycles at AC-15, 230 V
Protection Class IP20 (front)

Applications / Use Case

This Siemens 3RH2911-2GA31 auxiliary switch is commonly used in industrial automation systems worldwide. It serves critical roles in process control, machine automation, and factory control panels, where reliable switching and signaling of contactors are essential. Its compatibility with Siemens contactors makes it ideal for production line systems and packaging conveyor operations, ensuring safe and efficient electrical switching and status signaling in electrical control setups.

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3RH2911-2GA31

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