Siemens 3RH2911-1FB11 Auxiliary Switch, Screw Terminal for 3RT2 & 3RH2 Contactors Original Brand New

Overview: Siemens SIRIUS 3RH2911-1FB11 Auxiliary Switch

The Siemens 3RH2911-1FB11 is a high-quality, front-mounted auxiliary switch block from the SIRIUS modular system, specifically designed to expand the auxiliary contact capacity of Siemens 3RT2 power contactors and 3RH2 contactor relays. This essential industrial control component is identified as 1 NO (leading) + 1 NC (lagging) with 11 U identification, providing reliable signaling and control circuit functionality. Its tool-free snap-on mounting makes installation quick and simple, ensuring minimal downtime.

Key Functions & Technical Specifications

• Front Mounting: Effortlessly snaps onto the front of compatible contactors and contactor relays.
• Contact Configuration: 1 Normally Open (NO) contact and 1 Normally Closed (NC) contact.
  • Leading NO Contact (.7/.8): Closes before the main contacts.
  • Lagging NC Contact (.5/.6): Opens after the main contacts.
• Current Path Identification: 1 NO (leading), –, 1 NC (lagging), –.
• Terminal Type: Robust screw terminals for secure and permanent electrical connection.
• Compatibility: Designed for use with 3RT2 contactors and 3RH2 contactor relays (Sizes S00, S0, S2, S3).
• Protection: IP20 protection class on the front.
• Mechanical Life: Typical mechanical service life of 10,000,000 operating cycles.

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