3SK1121-2CB41

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$308.20
$308.20
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The Siemens 3SK1121-2CB41 is a high-quality SIRIUS safety relay designed for autonomous safety applications, offering reliable performance and advanced safety features. This industrial-grade relay provides 2 normally open (NO) instantaneous and 2 NO delayed relay circuits with a time delay adjustable from 0.05 to 3 seconds, operating on a 24V DC supply. Engineered to meet stringent safety standards like IEC 61508 and EN ISO 13849-1, the 3SK1121-2CB41 ensures enhanced protection for machinery and operators by monitoring safety circuits reliably. Its compact design, finger-safe protection (IP20), and spring-loaded terminals allow straightforward installation and secure wiring, making it ideal for factory control panels and safety systems integration.

Key Features of Siemens 3SK1121-2CB41

  • 2 NO instantaneous and 2 NO delayed contacts with adjustable OFF-delay from 0.05 to 3 seconds
  • 24V DC rated control supply voltage with operating range of 0.8 to 1.2 times rated voltage
  • Compact dimensions: 22.5 mm x 100 mm x 121.6 mm suitable for space-constrained control panels
  • Spring-loaded terminals for reliable and easy wiring
  • Finger-safe design and IP20 enclosure rating for operator protection
  • Complies with international safety standards including IEC 61508, EN ISO 13849-1, UL Listed, and CE Certified
  • Supports long wire length sensor connections up to 4000 meters with Cu 1.5 mm² cables
  • Resistant to vibration and shock per IEC 60068-2-6 and shock testing requirements
  • Includes backslide delay and recovery times ensuring reliable safety circuit response

Explore Siemens 3SK1121-2CB41 specifications covering voltage, I/O, and communication

Parameter Specification
Control Supply Voltage 24 V DC (0.8…1.2 x rated)
Relay Outputs 2 NO instantaneous + 2 NO delayed
Time Delay Adjustable 0.05 to 3 seconds
Enclosure Protection IP20
Dimensions (W x H x D) 22.5 mm x 100 mm x 121.6 mm
Operating Temp. -25 to +60 °C
Standards IEC 61508, EN ISO 13849-1, UL, CE

Applications / Use Case

This Siemens 3SK1121-2CB41 is commonly used in industrial automation systems worldwide where safe machine operation is critical. It is ideal for applications requiring time-delayed safety functions like two-hand control devices, enabling safe start-up sequences or ensuring machinery stops safely during faults. Commonly integrated into factory control panels, process control systems, packaging lines, and production machines, it helps companies comply with safety regulations and maintain operational reliability.

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3SK1121-2CB41

$308.20

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Does it come with a warranty?

Yes, All products are offered wth 1-Year warranty.

What is the condition of the product?

All products sold are New & Unused.

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All products are delivered within 2-8 business days depending on our stock location.

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