Description
The Siemens 3RH2911-1HA22 is a side-mount auxiliary contact block designed to expand the switching capability of compatible Siemens contactors and control relays. Featuring a 2NO (normally open) and 2NC (normally closed) contact configuration, this block provides flexible circuit control for a wide range of industrial and commercial HVAC applications.
Key Features
- 2NO (normally open) and 2NC (normally closed) contact configuration
- Designed for side-mounting on compatible Siemens 3RH and 3RT series contactors and control relays
- Snap-on installation for fast, tool-free assembly
- Compact design minimizes panel space requirements
- Suitable for use in control circuits, interlocking, and signaling applications
- Manufactured to Siemens quality standards for long service life and reliable performance
Applications
- Commercial and industrial HVAC control panels
- Motor starter and contactor auxiliary circuit expansion
- Control relay interlocking and signaling circuits
- Building automation and mechanical room electrical panels
Why Choose the Siemens 3RH2911-1HA22
As a genuine Siemens replacement and expansion component, the 3RH2911-1HA22 ensures full compatibility with your existing Siemens control hardware. Its dual-contact arrangement — two normally open and two normally closed — gives technicians the flexibility to handle multiple circuit functions from a single block, reducing wiring complexity and improving system reliability.
