Description
The Siemens 3RH2921-2DE11 is a 1NO/1NC auxiliary switch block designed to expand the contact capacity of Siemens 3RT and 3RH series contactors and motor starters. This side-mount auxiliary contact module snaps directly onto compatible Siemens contactor frames, providing a fast and tool-free installation for commercial and industrial HVAC control panels, motor control centers, and building automation systems.
Key Features
- 1 Normally Open (NO) and 1 Normally Closed (NC) contact configuration
- Designed for side-mounting on Siemens 3RT and 3RH series contactors and starters
- Snap-on, tool-free installation for quick field assembly
- Compact design minimizes panel space requirements
- Suitable for use in commercial HVAC control panels, motor control centers, and industrial automation applications
- Siemens quality construction for long service life and dependable switching performance
Applications
- HVAC motor starter auxiliary contact expansion
- Building automation and control panel wiring
- Motor control center (MCC) upgrades
- Contactor status signaling and interlocking circuits
Product Details
- Brand: Siemens
- SKU / Part Number: 3RH2921-2DE11
- Contact Type: 1NO / 1NC
- Series: 3RH2921
- Mount Type: Side-mount auxiliary contact block
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