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Siemens SIRIUS 3RH1921-2HA22-3AA1

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3RH1921-2HA22-3AA1

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The Siemens 3RH1921-2HA22-3AA1 is an auxiliary switch block designed for versatile control applications. It features two normally open (NO) and two normally closed (NC) contacts, providing flexible connectivity options in various configurations.

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Technical specifications for 3RH1921-2HA22-3AA1

ManufacturerSiemens
Product LineSIRIUS
Part Number3RH1921-2HA22-3AA1
Description of ModuleAuxiliary Switch Block
Number of Contacts2 NO + 2 NC
Protection ClassIP20
Ambient Temperature (Storage)-55 to +80 °C
Ambient Temperature (Operation)-25 to +60 °C
Mechanical Service Life10,000,000 switching cycles
Electrical Endurance (AC-15 at 230 V)200,000 switching cycles
Insulation Voltage690 V
Surge Voltage Resistance6 kV
Installation TypeSnap-on mounting
Width44 mm
Height38 mm
Depth51 mm
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The Siemens 3RH1921-2HA22-3AA1 belongs to the SIRIUS series and functions as an auxiliary switch block. This module is equipped with two normally open (NO) contacts and two normally closed (NC) contacts, allowing it to effectively tailor various applications. Rated for a high insulation voltage of 690 volts, this unit supports a wide range of operational requirements.

When it comes to environmental robustness, the switch block operates within ambient temperatures ranging from -25 °C to +60 °C, making it suitable for a variety of industrial conditions. For storage, it withstands temperatures ranging from -55 °C to +80 °C, ensuring reliability even under extreme conditions. The mechanical service life of the 3RH1921-2HA22-3AA1 is impressive, rated for 10 million switching cycles, which speaks to its durability. In terms of electrical performance, it demonstrates an endurance rate of 200,000 switching cycles at an AC-15 rating operating at 230 V.

This module meets the IP20 protection class, indicating a degree of safeguarding against solid object entry, but is not rated for liquid immersion. It includes a surge voltage resistance of up to 6 kV, enhancing its resilience against transient overvoltage conditions. Installation is straightforward with snap-on mounting, ensuring quick assembly. The dimensions of this auxiliary switch block include a width of 44 mm, a height of 38 mm, and a depth of 51 mm, allowing for compact integration into control systems.