Catalog > SIEMENS, SIGUARD, 3TK2821-1CB30, SAFETY ...

Verified: January 13, 2026

SIEMENS, SIGUARD, 3TK2821-1CB30, SAFETY RELAY (SP94)

~$30.00

The Siemens Siguard 3TK2821-1CB30 is a safety relay designed to monitor and control safety circuits in industrial applications.

Key Specifications

  • Voltage: 24 VDC
  • Contacts: 3 Normally Open (NO) contacts
  • Safety Category: EN 954-1 Category 4, SIL 3 according to IEC 61508
  • Mounting: 35mm DIN rail mount
  • Response Time: Less than 10ms
  • Diagnostic Coverage: High, up to 99%
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