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Why SIRIUS SMART Safety Relay 3SK0?

The 3SK0 Safety Relay, designed for the Chinese market, makes machinery safety easily.

With wide application coverage and a modular design, it makes safety intuitive and efficient—from system design to daily operation. The product is certified to CCC, CE, UL, and is recognized by authoritative institutions with a safety level up to PL e / SIL 3.

Significantly reduce fault-related downtime and embedding reliability​ throughout the equipment lifecycle with clear live diagnostics and status indication. Choosing the SIRIUS SMART Safety Relay 3SK0 means choosing efficient, compliant, and trustworthy safety protection.

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Easy to integrate

The 3SK0 easily integrates into various safety circuits to make machinery safety intuitive and easy to implement—from design to application. Significantly shorten the time from design to production.

Globally accepted & trusted protection

Comes with CCC, CE, UL, TÜV and more – your equipment can go to sea without worry. Certified by recognized third parties, with safety level up to PL e / SIL 3. Create a strong, reliable safety barrier for your machines.

Clear diagnostics

Real-time status display and clear fault indication enable quick troubleshooting, reduce downtime, and ensure more reliable operation.

Featured capabilities

High reliability

Certified by recognized third parties, with safety level up to PL e (EN ISO 13849-1)/ SIL 3 (EN 61508).

Wide coverage, Easy integration

  • Supports 1 dual-channel or 1 single-channel safety sensor input.
  • Compatible with emergency stop switches, door switches, safety light curtains, and other common safety sensors.
  • Supports automatic or manual startup modes.
  • Dual-channel output: 3 NO safety outputs + 1 NC signal output.
  • Control voltage 24V AC/DC, compliant with low-voltage operation requirements.

Clear diagnostics

The front status indicator displays real-time operating conditions and provides accurate fault diagnostics. This allows operators to monitor device status at a glance, quickly diagnose issues, and significantly reduce troubleshooting downtime—embedding reliability throughout the entire equipment lifecycle.

Additional resources

User manual

SIRIUS SMART Safety Relay
3SK0 manual