3RH2911-1FA22, Siemens Auxiliary Contact, 4 Contact, 2NO + 2NC, Snap-On, Sirius Innovation

Siemens Auxiliary Contact Block, 10A, 2NO/2NC - SIRIUS Innovation Series - 3RH2911-1FA22

This auxiliary contact block from Siemens monitors the contactor of a motor to ensure it's running properly. The unit automatically sends a signal to an external control device for quick diagnosis. Simply snap it on the front of the contactor for quick and simple installation. The block is designed for use with contactors, contactor relays and power contactors in the 3RT2 series, making it simple to build a complete setup. You can use this auxiliary contact block for signalling processes in HVAC (heating, ventilation and air conditioning) systems.

• Long mechanical service life of 10 million switching cycles for long-lasting performance
• Broad operating temperature range of -25°C to +60°C for use in demanding environments
• Screw terminals for a secure electrical connection
• Current rating of 10A for reduced power consumption
• Surge voltage resistance of 6kV for enhanced electrical safety

How reliable is this unit?

This unit has a contact reliability rating of one incorrect switching operation per 100 million switching operations, so it's unlikely to fail and will operate reliably throughout its service life.

Switching Devices for Load Feeders

3RH2911-1FA22 Datasheet

Sirius Innovation Accessory Guide

Sirius Innovation Catalogue

Sirius Innovations Switching Devices

Solutions for frequent switching or soft starting

Basic Information

Siemens Sirius Migration

Sirius: Migrating From Classic to Innovation

Catalogue - Contactors and Contactor Assemblies

Environmental Product Declaration

Environmental Product Declaration - Overview