3RH1921-1EA11 - 1NO-1NC Aux. Contact

3RH1921-1EA11 - 1NO-1NC  Aux. Contact

The Siemens 3RH1921-1EA11 Auxiliary Contact is engineered for electricians, facility managers, and industrial maintenance teams who need a dependable accessory that matches exact Siemens contactor interfaces. Designed to integrate seamlessly with compatible Siemens control components, this auxiliary contact delivers the connectors and switching feedback required in many control panel environments. With compact dimensions (3.74" H × 3.386" W × 1.929" D), it fits neatly into panel layouts where space and precision matter. Built to last with quality materials and straightforward electrical characteristics, it provides the functional switching feedback you expect without overstating performance claims.

Key Features and Benefits

• Exact Compatibility: Designed as an accessory to work with Siemens contactors requiring the 3RH auxiliary contact interface, helping you maintain original system configurations.
• Compact Form Factor: Measures just under 4″ tall and 3.4″ wide, ideal for densely populated control enclosures where space is at a premium.
• Clear Feedback Function: Supports auxiliary switching needs in control circuits, assisting operators and automation systems with reliable contact status information.
• Durable Construction: Built from quality materials to withstand typical industrial panel environment conditions and normal operating cycles.
• Easy Integration: Mounts directly to compatible Siemens equipment without modification, reducing installation time and minimizing wiring complexity.

Technical Specifications

• Manufacturer: Siemens
  
• Part Number: 3RH1921-1EA11
  
• Category: Auxiliary Contact Accessory
  
• Dimensions: 3.74″ (H) × 3.386″ (W) × 1.929″ (D)
  
• Poles: —
  
• Amperes: —
  
• A.I.C. Rating & Volts: —
  
• Type: 3RH Series Auxiliary Contact
  
• Coil Voltage: —
  
• Mounting: Panel/Contactor Attachment
  
• Enclosure Type: Open Panel/Control Box
  

(Note: Some ratings are determined by the host contactor’s specifications; confirm compatibility with your existing Siemens devices.)

Material Compliance and Certifications

• Industry Standards: This auxiliary contact is manufactured to align with industry electrical accessory standards. Used within Siemens systems and appropriate panel configurations, it supports code-compliant installations when paired with compatible Siemens components. Always install in accordance with local electrical codes and contactor manufacturer instructions.

Where It Works Best

• Existing Siemens control panels requiring replacement auxiliary contacts.
• Industrial motor control applications where auxiliary feedback is part of system logic.
• Commercial automation systems that utilize Siemens contactors within control cabinets.
• Maintenance inventories that support legacy Siemens 3RH equipment.