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Siemens SIRIUS 3RH1921-1MA11

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3RH1921-1MA11

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The Siemens 3RH1921-1MA11 auxiliary switch block features a dual-pole design, offering one normally open (NO) contact and one normally closed (NC) contact. This unit is engineered for reliable performance in various applications.

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Technical specifications for 3RH1921-1MA11

ManufacturerSiemens
Product LineSIRIUS
Part Number3RH1921-1MA11
UPC754554416199
Weight0.19 lbs (0.09 kg)
SeriesContactors
ProductAuxiliary Switch Block
Number of NO Contacts1
Number of NC Contacts1
Number of Poles2
Electrical ConnectionScrew Terminal
Maximum Ambient Temperature60 degrees Celsius
Minimum Ambient Temperature0 degrees Celsius
Operating HumidityUp to 80% RH (non-condensing)
Storage HumidityUp to 80% (non-condensing)
Maximum Operating Altitude1000 meters above sea level without derating
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The 3RH1921-1MA11 model from Siemens is an auxiliary switch block designed to enhance the functionality of contactor systems. It supports two poles with an arrangement of one normally open (NO) contact and one normally closed (NC) contact, suitable for various control applications. The physical dimensions of the switch block measure 45.00 cm in length, 51.00 cm in width, and 64.00 cm in height, making it compact for integration into existing panels. With a total weight of 0.065 kg, this component is lightweight and easy to manage.

Wiring is facilitated through screw terminals, ensuring robust electrical connections that enhance reliability in operation. The unit is rated for temperatures between 0 degrees Celsius and 60 degrees Celsius, providing versatility across different environments. Additionally, it tolerates humidity levels maintaining up to 80% relative humidity without condensation during operation and storage.

For installations at higher elevations, the 3RH1921-1MA11 is capable of operating at altitudes up to 1000 meters above sea level without derating, suitable for a variety of geographic locations. This design makes it a valuable component for applications that demand consistent performance under a range of conditions.