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3RH1921-1EA11 Siemens
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Key specifications
Manufacturer
Siemens
HS code
85365080
Ship to
Kenya
Availability
1394 remaining
Express delivery to your country
Full 12-month warranty
Secure payment process
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The Siemens 3RH1921-1EA11 is a high-quality auxiliary switch block designed to complement contactor setups in a variety of industrial applications. This switch block features a single normally open (NO) and a single normally closed (NC) contact, making it a versatile choice for enhancing control circuit flexibility. Engineered for lateral mounting, it seamlessly integrates with size S0 to S12 contactors, particularly those within the 3RT1 range. Constructed to meet the rigorous standards of the SIRIUS product line, the 3RH1921-1EA11 boasts an IP20 protection class on the front, ensuring it is safeguarded against solid objects larger than 12.5mm. Its robust design allows it to operate reliably within an ambient temperature range of -25 to +60 degrees Celsius, and it maintains performance during storage in temperatures from -55 to +80 degrees Celsius. The switch block is notable for its mechanical service life, offering approximately 10 million switching cycles, and an electrical endurance of 200,000 cycles at AC-15 at 230V, which speaks to its durability and longevity in demanding environments. The contact reliability is exceptional, with a very low chance of incorrect switching operations, ensuring consistent performance. Installation is straightforward with its snap-on mounting design, and it has a compact footprint with dimensions of 10mm in width, 80mm in height, and 71mm in depth. The screw-type terminals provide a secure and reliable electrical connection, accommodating a range of conductor cross-sections for auxiliary contacts. The 3RH1921-1EA11 is equipped with safety-related features such as a mirror contact according to IEC 60947-4-1, although it does not support positively driven operation according to IEC 60947-5-1. This auxiliary switch block is a testament to Siemens' commitment to quality, reliability, and innovation in industrial control components.
Typical applications
- Integration into motor control circuits for auxiliary switching functions
- Use in control panels for adding auxiliary contacts to existing contactor setups
- Implementation in automation systems for signal switching and feedback
- Application in conveyor systems for start/stop operations
- Utilisation in HVAC systems for controlling various stages of operation
- Inclusion in pump control circuits for additional control or indication purposes
- Employment in manufacturing equipment for extending control circuit capabilities
- Installation in packaging machinery for precise control over machine sequences
- Adaptation in material handling systems for auxiliary command functions
- Incorporation in lighting control circuits as auxiliary contacts for complex operations
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