The Siemens 3SK1121-2AB40 is a circuit protection device designed for 24 V DC applications, ensuring reliable safety control. It features advanced protection technology, ideal for safeguarding electrical circuits from overloads and short circuits. Typically, this component is used in industrial automation systems and machinery to enhance operational safety.
| Type |
Circuit protection |
| Control voltage 1 |
N/A |
| Control voltage 2 |
N/A |
| Depth |
121.6mm |
| Dim |
(W x H x D) 22.5 x 100 x 121.6 mm |
| Evaluation inputs |
One- and two-channel |
| Height |
100mm |
| Max. temperature |
60°C |
| Min. temperature |
-25°C |
| Misc Attribute |
3SK1121-2AB40 |
| Model |
Other |
| Nominal Voltage |
24V DC |
| Number of outputs, safety related, delayed, semiconductors |
N/A |
| Number of outputs, safety related, delayed, with contact |
0 |
| Number of outputs, safety related, undelayed, semiconductors |
N/A |
| Number of outputs, safety related, undelayed, with contact |
0 |
| Number of outputs, signalling function, delayed, semiconductors |
N/A |
| Number of outputs, signalling function, delayed, with contact |
0 |
| Number of outputs, signalling function, undelayed, semiconductors |
N/A |
| Number of outputs, signalling function, undelayed, with contact |
0 |
| Operating voltage AC 50 Hz |
N/A |
| Operating voltage AC 60 Hz |
N/A |
| Operating voltage DC |
N/A |
| Performance level according to EN ISO 13849-1 |
Level e |
| Power Consumption |
N/A |
| Rated switch current |
N/A |
| Release-delay |
N/A |
| SIL according to IEC 61508 |
3 |
| Stop category according to IEC 60204 |
0 |
| Suitable for monitoring of emergency-stop circuits |
TRUE |
| Suitable for monitoring of magnetic switches |
TRUE |
| Suitable for monitoring of optoelectronic protection equipment |
TRUE |
| Suitable for monitoring of position switches |
TRUE |
| Suitable for monitoring of proximity switches |
N/A |
| Suitable for monitoring of tactile sensors |
N/A |
| Suitable for monitoring of valves |
N/A |
| Suitable for rail mounting |
FALSE |
| Supply voltage AC 50 Hz |
N/A |
| Supply voltage AC 60 Hz |
N/A |
| Supply voltage DC |
N/A |
| Type of control voltage 1 |
N/A |
| Type of control voltage 2 |
N/A |
| Type of electric connection |
Spring clamp connection |
| Type of safety according to IEC 61496-1 |
N/A |
| Voltage type (operating voltage) |
N/A |
| Voltage type (supply voltage) |
N/A |
| Voltage type for actuating |
DC |
| Width |
22.5mm |
| With approval according to UL |
TRUE |
| With approval for BG BIA |
N/A |
| With approval for TÜV |
true |
| With detachable clamps |
FALSE |
| With feedback circuit |
TRUE |
| With muting function |
FALSE |
| With start input |
TRUE |
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