Siemens Auxiliary Switch Contact Block 3RH1921-1EA20

Siemens Auxiliary Switch Contact Block 3RH1921-1EA20

The Siemens 3RH1921-1EA20 is a lateral auxiliary switch block designed to enhance the functionality of Siemens SIRIUS contactors. Featuring two normally open (2NO) contacts, this auxiliary switch block is engineered for seamless integration with 3RT1 series contactors, providing reliable performance in various industrial applications.

Key Features

• Contact Configuration: 2 Normally Open (2NO) contacts.
• Mounting Type: Side-mounted with a snap-on design for easy installation.
• Electrical Ratings:
  • Voltage Rating: Up to 690 VAC.
  • Current Rating: 0.41 A.
  • Frequency: 50/60 Hz.
• Durability: Rated for up to 10 million operating cycles, ensuring long-term reliability.
• Operating Conditions:
  • Operating Temperature: -25°C to 60°C.
  • Storage Temperature: -55°C to 80°C.
• Protection: IP20 degree of protection.
• Compatibility: Suitable for use with Siemens SIRIUS 3RT1 series contactors, sizes S0 to S12.

Applications

The 3RH1921-1EA20 auxiliary switch block is ideal for applications requiring additional auxiliary contacts in control circuits. Its robust design and high durability make it suitable for various industrial environments, enhancing the versatility and functionality of Siemens SIRIUS contactors.

Installation

Designed for lateral mounting, the 3RH1921-1EA20 features a snap-on mechanism that allows for quick and secure attachment to compatible contactors without the need for additional tools. The screw terminal connections ensure a stable and reliable electrical connection.

Dimensions

• Height: 80 mm
• Width: 10 mm
• Depth: 71 mm

These compact dimensions facilitate easy integration into existing control panels and systems.

In summary, the Siemens 3RH1921-1EA20 auxiliary switch contact block offers a reliable and efficient solution for expanding the auxiliary contact capacity of Siemens SIRIUS contactors, ensuring enhanced control and flexibility in industrial applications.