Siemens
Siemens SIRIUS 3SK1121-1CB42 safety relay
Manufacturer part number: 3SK1121-1CB42ESYS SKU: 3SK1121-1CB42
Net unit price, VAT 0%
€349.60
VAT 25.5% and delivery are shown separately in the request summary.
Current availability
Current available stock: 2 pcs
- Minimum order
- 1 pcs
- Order increment
- 1 pcs
- Availability checked
- 1 Sept 2026, 08:45
Siemens SIRIUS 3SK1121-1CB42 safety relay. Key selection data: Instantaneous NO safety outputs: 2; Delayed NO safety outputs: 2; Adjustable off-delay range: 0.5 ... 30 s; SIL level: 3; Supply voltage: 24 V DC; Connector type: screw terminal.
pcs
Information for product selection
Typical applications
- Safety-function signal processing in machine automation
- Emergency-stop and guard circuit implementation
- Replacement in an existing Siemens assembly when article number 3SK1121-1CB42 matches
Key specifications
- Instantaneous NO safety outputs
- 2
- Delayed NO safety outputs
- 2
- Supply voltage
- 24 V DC
- Adjustable off-delay range
- 0.5 ... 30 s
- SIL level
- 3
- Connector type
- screw terminal
Show additional verified specifications
- Mounting method
- screw and snap-on mounting
- Protection rating
- IP20
- Mounting position
- any
- Connectable conductor cross-section
- 1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)
- Insulation voltage
- 300 V
- Width
- 22.5 mm
Lifecycle
- Status
- Active
Compatibility and related parts
3SK1121-1CB42
Replacement: Replacement is allowed only when the target article number is exactly 3SK1121-1CB42; this does not establish interchangeability with any other Siemens article.
