Link module electrical and mechanical for 3RV2.1/3RV2.2 and 3RT2.1 - 3RA1921-1DA00

Product Description

Siemens Link Module Electrical & Mechanical for 3RV2.1 / 3RV2.2 and 3RT2.1 – 3RA1921-1DA00

The Siemens 3RA1921-1DA00 is a SIRIUS link module designed to provide a combined electrical and mechanical connection between Siemens 3RV2.1 / 3RV2.2 motor protection circuit breakers (S0 size) and 3RT2.1 contactors (S00 size). It is part of the Siemens SIRIUS modular motor starter system, enabling compact and reliable motor starter assemblies without additional wiring.

This module is widely used in motor control centers (MCC), industrial automation panels, and motor starter combinations, where fast assembly, reduced wiring effort, and secure interlocking are required.

Key Features:

• Siemens SIRIUS link module 

• Part Number: 3RA1921-1DA00 

• Provides electrical + mechanical connection in one unit 

• Compatible with: 

o 3RV2.1 / 3RV2.2 motor protection circuit breakers (S0 size) 

o 3RT2.1 contactors (S00 size) 

• Supports AC and DC operation 

• Eliminates need for separate wiring between devices 

• Compact modular design for space-saving panel layout 

• Screw-type connection system 

• High reliability in vibration-prone industrial environments 

• Part of Siemens SIRIUS motor starter system