Siemens 10A Auxiliary Switch Block 3RH1921-1LA11

Siemens 3RH1921-1LA11 Auxiliary Switch Block

The Siemens 3RH1921-1LA11 is a high-quality auxiliary switch block designed to enhance the functionality of motor contactors. This 2-pole device features one normally open (NO) and one normally closed (NC) contact, providing versatile control options for various industrial applications.

Key Features

• Contact Configuration: 1 NO + 1 NC
• Compliance: Conforms to EN 50005 standards
• Connection Type: Screw terminals for secure and reliable connections
• Mounting: Snap-on front mounting for easy installation
• Cable Entry: Positioned at the top for convenient wiring

Electrical Specifications

• Rated Operational Voltage: Up to 690 VAC / 600 VDC
• Rated Operational Current: 10 A at AC-12 (24 V and 230 V)
• Operating Current at AC-15: 6 A at 24 V and 230 V; 3 A at 400 V; 1 A at 690 V
• Operating Current at DC-12: 10 A at 24 V; 3 A at 110 V; 1 A at 220 V
• Operating Current at DC-13: 6 A at 24 V; 2 A at 60 V; 1 A at 110 V; 0.3 A at 220 V

Mechanical Specifications

• Mechanical Service Life: Approximately 10 million switching cycles
• Electrical Endurance at AC-15 (230 V): Approximately 200,000 switching cycles
• Operating Temperature Range: -25°C to +60°C
• Storage Temperature Range: -55°C to +80°C
• Protection Class: IP20

Dimensions and Weight

• Width: 44 mm
• Height: 38 mm
• Depth: 51 mm
• Net Weight: 0.065 kg

The Siemens 3RH1921-1LA11 auxiliary switch block is engineered for durability and reliability, making it an excellent choice for expanding the control capabilities of motor contactors in industrial settings.