3RH2921-1DA11 Siemens Auxiliary Contact Block (1NO + 1NC)

The Siemens 3RH2921-1DA11 AUX 1NO + 1NC is an instantaneous auxiliary contact block used to expand the functionality of Siemens contactors and contactor relays. It mounts laterally (side-mounted) onto compatible SIRIUS contactors, adding additional electrical contacts for control circuit applications.

This auxiliary contact module contains:

• 1 Normally Open (NO) contact

• 1 Normally Closed (NC) contact

Product Specifications

• Manufacturer: Siemens

• Product Family: SIRIUS 3RH29

• Part Number: 3RH2921-1DA11

• Product Type: Auxiliary Contact Block

• Mounting Type: Lateral / Side Mount

• Contact Configuration: 1NO + 1NC

• Contact Type: Instantaneous Auxiliary Contacts

• Compatible Devices: Siemens 3RT2 Contactors and 3RH2 Contactor Relays

• Terminal Type: Screw Terminal

• Contact Arrangement: 51/52, 63/64 (left) or 31/32, 43/44 (right)

• Rated Insulation Voltage: 690 V

• Rated Impulse Withstand Voltage: 6 kV

• Protection Rating: IP20

• Mechanical Life: Up to 10,000,000 operating cycles

• Electrical Life (AC-15, 230V): Approximately 200,000 operating cycles

• Weight: Approx. 37 g

• Mounting Position: Side mounted