Siemens SIRIUS 3SK1 4 Auxiliary Contacts Safety Relay 24V dc, Single Channel 4 Safety Contacts
- RS Stock No.:
- 784-5819
- Distrelec Article No.:
- 304-11-451
- Mfr. Part No.:
- 3SK1121-2AB40
- Brand:
- Siemens
Subtotal (1 unit)*
£181.43
(exc. VAT)
£217.72
(inc. VAT)
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In Stock
- Plus 48 unit(s) shipping from 27 October 2025
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Units | Per unit |
|---|---|
| 1 + | £181.43 |
*price indicative
- RS Stock No.:
- 784-5819
- Distrelec Article No.:
- 304-11-451
- Mfr. Part No.:
- 3SK1121-2AB40
- Brand:
- Siemens
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Siemens | |
| Supply Voltage | 24V dc | |
| Number of Channels | 1 | |
| Safety Contacts | 4 | |
| Function | Safety Monitoring | |
| Auxiliary Contacts | 4 | |
| Reset Method | Automatic, Monitored | |
| Range | SIRIUS | |
| Safety Category ISO 13849-1 | 4 | |
| PL ISO 13849-1 | e | |
| SIL IEC 61508 | 3 | |
| Terminal Type | Cage Clamp | |
| Configurable | Yes | |
| Standards Met | RoHS Compliant | |
| Width | 22.5mm | |
| Series | 3SK1 | |
| Safety Category | 3 | |
| Depth | 122mm | |
| Length | 100mm | |
| Performance Level | e | |
Select all | ||
|---|---|---|
Brand Siemens | ||
Supply Voltage 24V dc | ||
Number of Channels 1 | ||
Safety Contacts 4 | ||
Function Safety Monitoring | ||
Auxiliary Contacts 4 | ||
Reset Method Automatic, Monitored | ||
Range SIRIUS | ||
Safety Category ISO 13849-1 4 | ||
PL ISO 13849-1 e | ||
SIL IEC 61508 3 | ||
Terminal Type Cage Clamp | ||
Configurable Yes | ||
Standards Met RoHS Compliant | ||
Width 22.5mm | ||
Series 3SK1 | ||
Safety Category 3 | ||
Depth 122mm | ||
Length 100mm | ||
Performance Level e | ||
- COO (Country of Origin):
- DE
Siemens Safety Relay, Push-In Terminals, 100mm Height - SIRIUS Series - 3SK1121-2AB40
Use this safety relay from Siemens to monitor your equipment and avoid electrical hazards. It triggers a shutdown response if a dangerous situation is detected, helping to prevent injury and machine damage. Thanks to its compact dimensions of 100 (H) x 22.5 (W) x 121.6mm (D), it takes up minimal space in your setup. A broad operating temperature range between -25°C and +60°C means you can rely on it to operate safely, even in demanding industrial environments. As this unit runs with a low power loss of 2W, it's an energy-efficient choice. You'll find it commonly used in the oil and gas industries.
Features & Benefits
• Surge voltage resistance of 4kV means it can resist sudden spikes in voltage
• IP20 rating indicates it's touch-proof and protected against objects larger than 12mm
• Robust mechanical lifespan of 10 million cycles for reliable long-term performance
• Can be mounted in any position for flexible installation
• IP20 rating indicates it's touch-proof and protected against objects larger than 12mm
• Robust mechanical lifespan of 10 million cycles for reliable long-term performance
• Can be mounted in any position for flexible installation
What's the supply voltage of this device?
This device has a supply voltage of 24V DC, so its a practical choice for use in low-voltage applications.
Related links
- Siemens SIRIUS 3SK1 Safety Relay 24V dc, Single Channel 4 Safety Contacts
- Siemens SIRIUS 3SK1 1 Auxiliary Contacts Safety Relay 24V dc, Dual-Channel 1 Safety Contacts
- Siemens SIRIUS 3SK1 Safety Relay 24V dc, Single Channel 0 Safety Contacts
- Siemens SIRIUS 3SK1 Safety Relay 24V dc, Single Channel 3 Safety Contacts
- Siemens SIRIUS 3SK1 1 Auxiliary Contacts Safety Relay 110 → 240V ac/dc, Dual-Channel 4 Safety Contacts
- Siemens SIRIUS 3SK1 Safety Relay 24V ac/dc, Single Channel 4 Safety Contacts
- Siemens SIRIUS 3SK1 Safety Relay 240V ac, Single Channel 4 Safety Contacts
- Siemens SIRIUS 3SK1 Safety Relay 110 → 240V ac/dc, Single Channel 4 Safety Contacts