The Siemens 3RH1911-2FA20 is a high-quality auxiliary switch block designed for seamless integration with contactor relays and motor switches. This component is part of the SIRIUS product family, renowned for its reliability and performance in industrial control applications. With a protection class of IP20, it is suitable for use in a variety of operating environments.
This auxiliary switch block features two normally open (NO) contacts, providing a dependable solution for expanding control circuits. It is engineered to operate within a wide ambient temperature range, from -25°C to +60°C during operation, ensuring consistent performance even in demanding conditions.
The 3RH1911-2FA20 boasts an impressive mechanical operating life of typically 10 million cycles and an electrical operating life of 200,000 cycles at AC-15 at 230V, highlighting its durability and longevity. The contact reliability is exceptional, with a very low chance of incorrect switching operations, ensuring accurate and reliable circuit control.
Installation is made easy with its snap-on mounting design, and the spring-loaded terminals allow for quick and secure electrical connections. The switch block's dimensions are compact, with a width of 36.5mm, height of 37.5mm, and depth of 46mm, making it suitable for space-constrained applications.
The 3RH1911-2FA20 is designed with safety in mind, featuring mirror contacts according to IEC 60947-4-1 and positively driven operation according to IEC 60947-5-1 when used with 3RT1 and 3RH1 respectively.
This auxiliary switch block is a preferred choice for professionals seeking a robust and reliable component for their industrial control systems. Its technical specifications and build quality make it a valuable addition to any setup requiring precise control and long-term dependability.