Brand: Siemens
Model‑No.: 3SK1121‑1CB42
Series: SIRIUS 3SK1 Advanced safety‑relay basic unit
Rated supply‑voltage: 24 V DC
Time‑delay range: 0.5‑30 seconds adjustable
Safety contacts: 2×instant‑action NO contacts + 2×time‑delay NO contacts
Input mode: Single‑channel / dual‑channel sensor monitoring, cross‑circuit fault‑detection
Reset mode: Automatic monitored reset
Safety certification: PL‑e、SIL3、Category 4 (ISO13849‑1)
Terminal: Screw‑type wiring terminals
Outer dimension: 22.5 × 100 × 121.6 mm
Mounting: Standard 35‑mm DIN rail installation
Housing protection: IP20
Max contact load: 3A @24V DC‑13
Operating temperature: ‑20℃ ~ +55℃
3SK1121-1CB42 Specifications
| Brand | Siemens |
|---|---|
| Model‑No | 3SK1121‑1CB42 |
| Series | SIRIUS 3SK1 Advanced safety‑relay basic unit |
| Rated supply‑voltage | 24 V DC |
| Time‑delay range | 0.5‑30 seconds adjustable |
| Safety contacts | 2×instant‑action NO contacts + 2×time‑delay NO contacts |
| Input mode | Single‑channel / dual‑channel sensor monitoring, cross‑circuit fault‑detection |
| Reset mode | Automatic monitored reset |
| Safety certification | PL‑e、SIL3、Category 4 (ISO13849‑1) |
| Terminal | Screw‑type wiring terminals |
| Outer dimension | 22.5 × 100 × 121.6 mm |
| Mounting | Standard 35‑mm DIN rail installation |
| Housing protection | IP20 |
| Max contact load | 3A @24V DC‑13 |
| Operating temperature | ‑20℃ ~ +55℃ |
About the 3SK1121-1CB42
The Siemens 3SK1121-1CB42 is a electrical products used in industrial automation, control and power systems. It is rated at Brand Siemens, Model‑No 3SK1121‑1CB42, Series SIRIUS 3SK1 Advanced safety‑relay basic unit. Manufactured by Siemens, this electrical products is supplied as new, original industrial-grade stock. Each unit is identified by manufacturer part number 3SK1121-1CB42 for accurate procurement and cross-referencing.
Why source the 3SK1121-1CB42 from HDE123
- Verified part number: every 3SK1121-1CB42 is checked against its manufacturer specification before shipment.
- 15 confirmed technical parameters available on this page for engineering review.
- Global delivery with clear lead time and commercial invoice for B2B buyers.
- Fast B2B support: send us the equipment model or an existing part number and our engineers confirm compatibility before you order.
Ordering the 3SK1121-1CB42
To order the Siemens 3SK1121-1CB42, add it to your cart and complete checkout, or use the Request a Quote form for volume purchases and replacement / cross-reference enquiries. Lead time: typically 3–10 working days for in-stock items, subject to confirmation. Worldwide shipping is available and a commercial invoice is provided for customs.