3RH1921-2FA11 SIEMENS

The 3RH1921-2FA11 auxiliary switch block from Siemens is designed to enhance the functionality of contactor relays and motor contactors within sizes S0 to S12, conforming to EN 50005 standards. This switch block features a combination of one normally open (NO) and one normally closed (NC) contact, providing versatile switching options for control circuits. Its spring-type terminals ensure a secure and vibration-resistant connection, simplifying installation and maintenance. The auxiliary switch block is crucial for expanding the control capabilities of the main contactor, enabling signaling, interlocking, or parallel switching functions. It is suitable for diverse industrial applications, including motor control, automation systems, and power distribution. By adding auxiliary contacts, the 3RH1921-2FA11 allows for more complex control schemes and improved system reliability. This component is essential for creating comprehensive and adaptable control solutions. Its robust design guarantees long-term performance in demanding environments. The compact size of the auxiliary switch block ensures efficient use of space within control panels.